USCG General Subjects Exam Module Designated
Duty Engineer 10004000 HP
ID14101
,USCG General Subjects Exam Module Designated Duty Engineer 10004000 HP
1. Cargo loading changes the vessel's vertical center of gravity. With respect to 10. An alarm appears after a change in plant configuration. Which action is most
Cargo operations, stowage, securing and hazards relevant to vessel type, what is likely to prevent recurrence of a problem involving damage control?
the best FIRST action? A. Make several plant changes simultaneously before recording the original condition.
A. Move heavy cargo higher to free lower deck space without recalculation. B. Increase machinery load to see whether the abnormal indication clears.
B. Correct a list by moving weight without checking stability impact. C. Compare operating pressures/temperatures, equipment status and recent changes to
C. Ignore slack-tank effects because total liquid weight is unchanged. isolate the fault safely, then confirm that the corrective action is effective before
D. Recalculate the relevant stability condition before accepting the loading or closure.
ballast change. D. Disable an alarm that is interrupting operations.
Correct Answer: D Correct Answer: C
Explanation: A defensible professional decision should be based on current evidence and Explanation: This is the most appropriate option because it connects the observed
applicable criteria. The other choices rely on assumption, remove safeguards, or change condition to the governing requirement and leaves a record of why the decision was made.
conditions before the cause is understood.
11. A towing or deck operation is affected by changing weather. Which sequence is
2. A deck load is shifted to a higher position. Which evidence is most important most appropriate when carrying out abandonment procedures?
when evaluating Cargo operations? A. Silence a machinery alarm and continue at the same load without investigation.
A. Review loading manual limits, free-surface moment and resulting draft/trim and B. Use all available means to assess collision risk and take early, substantial action
compare the findings with the applicable criteria. consistent with the applicable navigation rules, then verify the resulting state
B. Accept a loading condition based only on even draft readings. before moving to the next step.
C. Ignore slack-tank effects because total liquid weight is unchanged. C. Use a single navigation source after another source shows a material discrepancy.
D. Move heavy cargo higher to free lower deck space without recalculation. D. Assume constant bearing is harmless when range is decreasing.
Correct Answer: A Correct Answer: B
Explanation: This is the most appropriate option because it connects the observed Explanation: The correct choice follows a verify-act-confirm sequence. That is more
condition to the governing requirement and leaves a record of why the decision was made. reliable than bypassing controls or making multiple uncontrolled changes.
3. A deck watch detects a change in bearing to another vessel. Which response 12. An electrical protective device trips repeatedly; a machinery temperature
best controls the primary risk associated with hazards relevant to vessel type? rises 20 C above its normal trend. Which choice demonstrates the strongest
A. Use a single navigation source after another source shows a material discrepancy. control of Marine engineering or electrical systems applicable to the named
B. Cross-check navigation sources and resolve a position discrepancy before relying on officer/module?
the fix. A. Increase machinery load to see whether the abnormal indication clears.
C. Assume constant bearing is harmless when range is decreasing. B. Make several plant changes simultaneously before recording the original condition.
D. Silence a machinery alarm and continue at the same load without investigation. C. Reset a protective trip repeatedly without finding the cause.
Correct Answer: B D. Compare operating pressures/temperatures, equipment status and recent changes to
Explanation: The correct choice follows a verify-act-confirm sequence. That is more isolate the fault safely.
reliable than bypassing controls or making multiple uncontrolled changes. Correct Answer: D
Explanation: The strongest exam-style response is the one that controls immediate risk,
4. A spill occurs during machinery or cargo operations; a target bearing remains
checks the relevant condition, and then acts within the defined requirements for Marine
nearly constant as range decreases. Before proceeding with work involving Marine engineering or electrical systems applicable to the named officer/module.
safety systems, lifesaving appliances and emergency procedures, what should be
verified? 13. A pump loses discharge pressure while demand remains constant. What is
A. Enter an enclosed space based only on a prior atmosphere test. required before accepting the result related to Marine engineering?
B. Wash a small spill overboard rather than initiating the response process. A. Disable an alarm that is interrupting operations.
C. Review equipment inventory, inspection status and operational readiness and compare B. Reset a protective trip repeatedly without finding the cause.
the findings with the applicable criteria. C. Review pressure, temperature, lubrication, electrical load, alarm history and
D. Continue the transfer until the planned quantity is complete. equipment status and compare the findings with the applicable criteria.
Correct Answer: C D. Increase machinery load to see whether the abnormal indication clears.
Explanation: The strongest exam-style response is the one that controls immediate risk, Correct Answer: C
checks the relevant condition, and then acts within the defined requirements for Marine Explanation: The correct response protects the integrity of the process: establish the
safety systems, lifesaving appliances and emergency procedures. facts, apply the appropriate control, and verify the result before closure.
5. An enclosed-space task is proposed without a completed entry check. Which 14. An alarm occurs during machinery operation. Under these conditions, when
troubleshooting approach is most appropriate for Marine safety systems? should the issue involving electrical systems applicable to the named
A. Stop or control the operation, protect personnel and follow the required emergency officer/module be escalated?
or pollution-response procedure. A. Discharge a small contaminant amount rather than initiating the response procedure.
B. Depart with required safety equipment unavailable because conditions are calm. B. Verify the loading and stability data before accepting a cargo or ballast change.
C. Continue the transfer until the planned quantity is complete. C. Make an unverified ballast change solely to improve trim.
D. Enter an enclosed space based only on a prior atmosphere test. D. Depart with required safety equipment inoperative because the voyage is short.
Correct Answer: A Correct Answer: B
Explanation: The correct response protects the integrity of the process: establish the Explanation: This approach preserves control of the situation while producing evidence
facts, apply the appropriate control, and verify the result before closure. that can confirm whether the action actually corrected the issue involving electrical
systems applicable to the named officer/module.
6. A pollution-prevention control is compromised during operations. Which action
best supports a defensible decision about lifesaving appliances? 15. A pollution-prevention barrier is found compromised during transfer. Which
A. Make an unverified ballast change solely to improve trim. comparison is most useful for interpreting Pollution prevention, MARPOL
B. Depart with required safety equipment inoperative because the voyage is short. principles and environmental protection?
C. Discharge a small contaminant amount rather than initiating the response procedure. A. Continue the transfer until the planned quantity is complete.
D. Verify the loading and stability data before accepting a cargo or ballast change. B. Review source/quantity of release, containment condition, notifications and
Correct Answer: D response equipment and compare the findings with the applicable criteria.
Explanation: This approach preserves control of the situation while producing evidence C. Depart with required safety equipment unavailable because conditions are calm.
that can confirm whether the action actually corrected the issue involving lifesaving D. Wash a small spill overboard rather than initiating the response process.
appliances. Correct Answer: B
Explanation: This answer uses verified evidence before action, which reduces the chance
7. A spill occurs during machinery or cargo operations. A change affecting
of masking the real problem and supports a traceable decision about Pollution
emergency procedures is being considered. How should it be handled? prevention, MARPOL principles and environmental protection.
A. Continue the transfer until the planned quantity is complete.
B. Depart with required safety equipment unavailable because conditions are calm. 16. Required lifesaving equipment is not ready before departure; the vessel draft
C. Wash a small spill overboard rather than initiating the response process. increases after cargo loading. Which action best distinguishes the underlying
D. Stop or control the operation, protect personnel and follow the required emergency cause from a symptom in Pollution prevention?
or pollution-response procedure. A. Enter an enclosed space based only on a prior atmosphere test.
Correct Answer: D B. Wash a small spill overboard rather than initiating the response process.
Explanation: This answer uses verified evidence before action, which reduces the chance C. Continue the transfer until the planned quantity is complete.
of masking the real problem and supports a traceable decision about emergency D. Correct a required safety-equipment deficiency and verify readiness before
procedures. proceeding, then confirm that the corrective action is effective before closure.
Correct Answer: D
8. A pump loses discharge pressure while demand remains constant; visibility
Explanation: The selected action best supports safe, compliant, and technically sound
falls below one nautical mile. The abnormal condition directly affects Fire
performance because it addresses Pollution prevention using observable evidence rather
prevention, firefighting, damage control and abandonment procedures. What is the than convenience.
most appropriate response?
A. Increase machinery load to see whether the abnormal indication clears. 17. A vessel approaches restricted visibility with traffic nearby. Which response
B. Compare operating pressures/temperatures, equipment status and recent changes to is most consistent with the professional or compliance requirements governing
isolate the fault safely. MARPOL principles?
C. Make several plant changes simultaneously before recording the original condition. A. Silence a machinery alarm and continue at the same load without investigation.
D. Reset a protective trip repeatedly without finding the cause. B. Use a single navigation source after another source shows a material discrepancy.
Correct Answer: B C. Cross-check navigation sources and resolve a position discrepancy before relying on
Explanation: The selected action best supports safe, compliant, and technically sound the fix.
performance because it addresses Fire prevention, firefighting, damage control and D. Assume constant bearing is harmless when range is decreasing.
abandonment procedures using observable evidence rather than convenience. Correct Answer: C
Explanation: A defensible professional decision should be based on current evidence and
9. A vessel approaches restricted visibility with traffic nearby. Which
applicable criteria. The other choices rely on assumption, remove safeguards, or change
documentation approach best supports traceability for Fire prevention? conditions before the cause is understood.
A. Record the observed condition, supporting evidence, decision and responsible
follow-up; communicate any unresolved risk to the next responsible person. 18. A pollution-prevention barrier is found compromised during transfer. Which
B. Use a single navigation source after another source shows a material discrepancy. handoff practice best reduces error risk for environmental protection?
C. Assume constant bearing is harmless when range is decreasing. A. Wash a small spill overboard rather than initiating the response process.
D. Silence a machinery alarm and continue at the same load without investigation. B. Record the observed condition, supporting evidence, decision and responsible
Correct Answer: A follow-up; communicate any unresolved risk to the next responsible person.
Explanation: A defensible professional decision should be based on current evidence and C. Enter an enclosed space based only on a prior atmosphere test.
applicable criteria. The other choices rely on assumption, remove safeguards, or change D. Depart with required safety equipment unavailable because conditions are calm.
conditions before the cause is understood. Correct Answer: B
Explanation: This is the most appropriate option because it connects the observed
condition to the governing requirement and leaves a record of why the decision was made.
1
,USCG General Subjects Exam Module Designated Duty Engineer 10004000 HP
19. A position fix disagrees with the expected track. Which decision about STCW 28. The vessel approaches a traffic or pilotage constraint; visibility falls
competence, drills, records and professional watchkeeping standards is best below one nautical mile. The abnormal condition directly affects Navigation
supported by the available evidence? rules, watchkeeping responsibilities and bridge resource management. What is the
A. Assume there is no risk because the other vessel is visually small. most appropriate response?
B. Use all available means to determine collision risk and take early, substantial A. Cross-check position, traffic and navigation sources before altering the passage
action consistent with the applicable navigation rules. plan.
C. Continue on an uncertain position until the next scheduled fix. B. Make a series of small course changes that are difficult to detect.
D. Rely on one electronic source when independent information conflicts. C. Rely on one electronic source when independent information conflicts.
Correct Answer: B D. Assume there is no risk because the other vessel is visually small.
Explanation: The correct choice follows a verify-act-confirm sequence. That is more Correct Answer: A
reliable than bypassing controls or making multiple uncontrolled changes. Explanation: The strongest exam-style response is the one that controls immediate risk,
checks the relevant condition, and then acts within the defined requirements for
20. An engineering watch observes an abnormal temperature or pressure; the vessel Navigation rules, watchkeeping responsibilities and bridge resource management.
draft increases after cargo loading. Which review step adds the most value before
closing work involving STCW competence? 29. Visibility falls and several targets appear on radar. Which documentation
A. Discharge a small contaminant amount rather than initiating the response procedure. approach best supports traceability for Navigation rules?
B. Make an unverified ballast change solely to improve trim. A. Continue on an uncertain position until the next scheduled fix.
C. Depart with required safety equipment inoperative because the voyage is short. B. Assume there is no risk because the other vessel is visually small.
D. Verify the loading and stability data before accepting a cargo or ballast change, C. Record the observed condition, supporting evidence, decision and responsible
then confirm that the corrective action is effective before closure. follow-up; communicate any unresolved risk to the next responsible person.
Correct Answer: D D. Make a series of small course changes that are difficult to detect.
Explanation: The strongest exam-style response is the one that controls immediate risk, Correct Answer: C
checks the relevant condition, and then acts within the defined requirements for STCW Explanation: The correct response protects the integrity of the process: establish the
competence. facts, apply the appropriate control, and verify the result before closure.
21. Visibility falls and several targets appear on radar. With respect to 30. Visibility falls and several targets appear on radar. Which action is most
professional watchkeeping standards, what is the best FIRST action? likely to prevent recurrence of a problem involving watchkeeping
A. Continue on an uncertain position until the next scheduled fix. responsibilities?
B. Use all available means to determine collision risk and take early, substantial A. Rely on one electronic source when independent information conflicts.
action consistent with the applicable navigation rules. B. Make a series of small course changes that are difficult to detect.
C. Assume there is no risk because the other vessel is visually small. C. Cross-check position, traffic and navigation sources before altering the passage
D. Make a series of small course changes that are difficult to detect. plan, then confirm that the corrective action is effective before closure.
Correct Answer: B D. Continue on an uncertain position until the next scheduled fix.
Explanation: The correct response protects the integrity of the process: establish the Correct Answer: C
facts, apply the appropriate control, and verify the result before closure. Explanation: This approach preserves control of the situation while producing evidence
that can confirm whether the action actually corrected the issue involving watchkeeping
22. An engineering watch observes an abnormal temperature or pressure. Which responsibilities.
evidence is most important when evaluating Communications, GMDSS awareness and
distress/urgency procedures? 31. A stability calculation is required after cargo or ballast changes. Which
A. Depart with required safety equipment inoperative because the voyage is short. sequence is most appropriate when carrying out bridge resource management?
B. Review required safety equipment and readiness before departure and compare the A. Assume constant bearing is harmless when range is decreasing.
findings with the applicable criteria. B. Respond to an abnormal machinery indication by protecting the plant, confirming the
C. Discharge a small contaminant amount rather than initiating the response procedure. indication and following the operating procedure, then verify the resulting state
D. Make an unverified ballast change solely to improve trim. before moving to the next step.
Correct Answer: B C. Silence a machinery alarm and continue at the same load without investigation.
Explanation: This approach preserves control of the situation while producing evidence D. Use a single navigation source after another source shows a material discrepancy.
that can confirm whether the action actually corrected the issue involving Correct Answer: B
Communications, GMDSS awareness and distress/urgency procedures. Explanation: This answer uses verified evidence before action, which reduces the chance
of masking the real problem and supports a traceable decision about bridge resource
23. A towing or deck operation is affected by changing weather. Which response management.
best controls the primary risk associated with GMDSS awareness?
A. Cross-check navigation sources and resolve a position discrepancy before relying on 32. A navigation fix does not agree with another available source; the vessel
the fix. draft increases after cargo loading. Which choice demonstrates the strongest
B. Silence a machinery alarm and continue at the same load without investigation. control of Chartwork, publications, voyage planning and position fixing?
C. Use a single navigation source after another source shows a material discrepancy. A. Discharge a small contaminant amount rather than initiating the response procedure.
D. Assume constant bearing is harmless when range is decreasing. B. Verify the loading and stability data before accepting a cargo or ballast change.
Correct Answer: A C. Make an unverified ballast change solely to improve trim.
Explanation: This answer uses verified evidence before action, which reduces the chance D. Depart with required safety equipment inoperative because the voyage is short.
of masking the real problem and supports a traceable decision about GMDSS awareness. Correct Answer: B
Explanation: The selected action best supports safe, compliant, and technically sound
24. A pre-departure check identifies a safety-equipment deficiency; a navigation performance because it addresses Chartwork, publications, voyage planning and position
fix differs by 0.8 nautical mile from another source. Before proceeding with work fixing using observable evidence rather than convenience.
involving distress/urgency procedures, what should be verified?
A. Make an unverified ballast change solely to improve trim. 33. A stability calculation is required after cargo or ballast changes. What is
B. Depart with required safety equipment inoperative because the voyage is short. required before accepting the result related to voyage planning?
C. Review stability data, loading condition and free-surface effects and compare the A. Review weather, tide/current, under-keel clearance and route hazards and compare
findings with the applicable criteria. the findings with the applicable criteria.
D. Discharge a small contaminant amount rather than initiating the response procedure. B. Use a single navigation source after another source shows a material discrepancy.
Correct Answer: C C. Assume constant bearing is harmless when range is decreasing.
Explanation: The selected action best supports safe, compliant, and technically sound D. Silence a machinery alarm and continue at the same load without investigation.
performance because it addresses distress/urgency procedures using observable evidence Correct Answer: A
rather than convenience. Explanation: A defensible professional decision should be based on current evidence and
applicable criteria. The other choices rely on assumption, remove safeguards, or change
25. A position fix disagrees with the expected track. Which troubleshooting conditions before the cause is understood.
approach is most appropriate for Collision avoidance, maneuvering, pilotage and
restricted-water operations? 34. A towing or deck operation is affected by changing weather. Under these
A. Continue on an uncertain position until the next scheduled fix. conditions, when should the issue involving position fixing be escalated?
B. Assume there is no risk because the other vessel is visually small. A. Depart with required safety equipment inoperative because the voyage is short.
C. Make a series of small course changes that are difficult to detect. B. Verify the loading and stability data before accepting a cargo or ballast change.
D. Use all available means to determine collision risk and take early, substantial C. Discharge a small contaminant amount rather than initiating the response procedure.
action consistent with the applicable navigation rules. D. Make an unverified ballast change solely to improve trim.
Correct Answer: D Correct Answer: B
Explanation: A defensible professional decision should be based on current evidence and Explanation: This is the most appropriate option because it connects the observed
applicable criteria. The other choices rely on assumption, remove safeguards, or change condition to the governing requirement and leaves a record of why the decision was made.
conditions before the cause is understood.
35. Ballast is proposed to correct a list. Which comparison is most useful for
26. Visibility falls and several targets appear on radar. Which action best interpreting Cargo operations, stowage, securing and hazards relevant to vessel
supports a defensible decision about Collision avoidance? type?
A. Rely on one electronic source when independent information conflicts. A. Review displacement, weight location, GM/stability data and tank condition and
B. Make a series of small course changes that are difficult to detect. compare the findings with the applicable criteria.
C. Cross-check position, traffic and navigation sources before altering the passage B. Correct a list by moving weight without checking stability impact.
plan. C. Move heavy cargo higher to free lower deck space without recalculation.
D. Continue on an uncertain position until the next scheduled fix. D. Accept a loading condition based only on even draft readings.
Correct Answer: C Correct Answer: A
Explanation: This is the most appropriate option because it connects the observed Explanation: The correct choice follows a verify-act-confirm sequence. That is more
condition to the governing requirement and leaves a record of why the decision was made. reliable than bypassing controls or making multiple uncontrolled changes.
27. A vessel must plan a passage through constrained waters. A change affecting 36. A slack tank creates additional free-surface effect; the vessel draft
restricted-water operations is being considered. How should it be handled? increases after cargo loading. Which action best distinguishes the underlying
A. Use a single navigation source after another source shows a material discrepancy. cause from a symptom in Cargo operations?
B. Assume constant bearing is harmless when range is decreasing. A. Account for free-surface and weight-shift effects when evaluating stability and
C. Cross-check navigation sources and resolve a position discrepancy before relying on trim, then confirm that the corrective action is effective before closure.
the fix. B. Ignore slack-tank effects because total liquid weight is unchanged.
D. Silence a machinery alarm and continue at the same load without investigation. C. Accept a loading condition based only on even draft readings.
Correct Answer: C D. Correct a list by moving weight without checking stability impact.
Explanation: The correct choice follows a verify-act-confirm sequence. That is more Correct Answer: A
reliable than bypassing controls or making multiple uncontrolled changes. Explanation: The strongest exam-style response is the one that controls immediate risk,
checks the relevant condition, and then acts within the defined requirements for Cargo
operations.
2
, USCG General Subjects Exam Module Designated Duty Engineer 10004000 HP
37. A vessel must plan a passage through constrained waters. Which response is 46. A machinery temperature rises above its normal operating trend. Which action
most consistent with the professional or compliance requirements governing best supports a defensible decision about Marine engineering or electrical
hazards relevant to vessel type? systems applicable to the named officer/module?
A. Assume constant bearing is harmless when range is decreasing. A. Compare operating pressures/temperatures, equipment status and recent changes to
B. Silence a machinery alarm and continue at the same load without investigation. isolate the fault safely.
C. Cross-check navigation sources and resolve a position discrepancy before relying on B. Make several plant changes simultaneously before recording the original condition.
the fix. C. Increase machinery load to see whether the abnormal indication clears.
D. Use a single navigation source after another source shows a material discrepancy. D. Disable an alarm that is interrupting operations.
Correct Answer: C Correct Answer: A
Explanation: The correct response protects the integrity of the process: establish the Explanation: This approach preserves control of the situation while producing evidence
facts, apply the appropriate control, and verify the result before closure. that can confirm whether the action actually corrected the issue involving Marine
engineering or electrical systems applicable to the named officer/module.
38. Required lifesaving equipment is not ready before departure. Which handoff
practice best reduces error risk for Marine safety systems, lifesaving appliances 47. An alarm appears after a change in plant configuration. A change affecting
and emergency procedures? Marine engineering is being considered. How should it be handled?
A. Wash a small spill overboard rather than initiating the response process. A. Reset a protective trip repeatedly without finding the cause.
B. Enter an enclosed space based only on a prior atmosphere test. B. Disable an alarm that is interrupting operations.
C. Record the observed condition, supporting evidence, decision and responsible C. Make several plant changes simultaneously before recording the original condition.
follow-up; communicate any unresolved risk to the next responsible person. D. Protect the plant, verify the indication and diagnose the affected system before
D. Depart with required safety equipment unavailable because conditions are calm. resetting or increasing load.
Correct Answer: C Correct Answer: D
Explanation: This approach preserves control of the situation while producing evidence Explanation: This answer uses verified evidence before action, which reduces the chance
that can confirm whether the action actually corrected the issue involving Marine safety of masking the real problem and supports a traceable decision about Marine engineering.
systems, lifesaving appliances and emergency procedures.
48. A vessel approaches restricted visibility with traffic nearby; visibility
39. A pollution-prevention barrier is found compromised during transfer. Which falls below one nautical mile. The abnormal condition directly affects electrical
decision about Marine safety systems is best supported by the available evidence? systems applicable to the named officer/module. What is the most appropriate
A. Continue the transfer until the planned quantity is complete. response?
B. Stop or control the operation, protect personnel and follow the required emergency A. Make an unverified ballast change solely to improve trim.
or pollution-response procedure. B. Depart with required safety equipment inoperative because the voyage is short.
C. Depart with required safety equipment unavailable because conditions are calm. C. Verify the loading and stability data before accepting a cargo or ballast change.
D. Wash a small spill overboard rather than initiating the response process. D. Discharge a small contaminant amount rather than initiating the response procedure.
Correct Answer: B Correct Answer: C
Explanation: This answer uses verified evidence before action, which reduces the chance Explanation: The selected action best supports safe, compliant, and technically sound
of masking the real problem and supports a traceable decision about Marine safety performance because it addresses electrical systems applicable to the named
systems. officer/module using observable evidence rather than convenience.
40. An engineering watch observes an abnormal temperature or pressure; the vessel 49. An enclosed-space task is proposed without a completed entry check. Which
draft increases after cargo loading. Which review step adds the most value before documentation approach best supports traceability for Pollution prevention,
closing work involving lifesaving appliances? MARPOL principles and environmental protection?
A. Depart with required safety equipment inoperative because the voyage is short. A. Depart with required safety equipment unavailable because conditions are calm.
B. Discharge a small contaminant amount rather than initiating the response procedure. B. Continue the transfer until the planned quantity is complete.
C. Make an unverified ballast change solely to improve trim. C. Enter an enclosed space based only on a prior atmosphere test.
D. Verify the loading and stability data before accepting a cargo or ballast change, D. Record the observed condition, supporting evidence, decision and responsible
then confirm that the corrective action is effective before closure. follow-up; communicate any unresolved risk to the next responsible person.
Correct Answer: D Correct Answer: D
Explanation: The selected action best supports safe, compliant, and technically sound Explanation: A defensible professional decision should be based on current evidence and
performance because it addresses lifesaving appliances using observable evidence rather applicable criteria. The other choices rely on assumption, remove safeguards, or change
than convenience. conditions before the cause is understood.
41. Required lifesaving equipment is not ready before departure. With respect to 50. A spill occurs during machinery or cargo operations. Which action is most
emergency procedures, what is the best FIRST action? likely to prevent recurrence of a problem involving Pollution prevention?
A. Depart with required safety equipment unavailable because conditions are calm. A. Correct a required safety-equipment deficiency and verify readiness before
B. Stop or control the operation, protect personnel and follow the required emergency proceeding, then confirm that the corrective action is effective before closure.
or pollution-response procedure. B. Wash a small spill overboard rather than initiating the response process.
C. Continue the transfer until the planned quantity is complete. C. Enter an enclosed space based only on a prior atmosphere test.
D. Enter an enclosed space based only on a prior atmosphere test. D. Depart with required safety equipment unavailable because conditions are calm.
Correct Answer: B Correct Answer: A
Explanation: A defensible professional decision should be based on current evidence and Explanation: This is the most appropriate option because it connects the observed
applicable criteria. The other choices rely on assumption, remove safeguards, or change condition to the governing requirement and leaves a record of why the decision was made.
conditions before the cause is understood.
51. A pre-departure check identifies a safety-equipment deficiency. Which
42. An alarm appears after a change in plant configuration. Which evidence is sequence is most appropriate when carrying out MARPOL principles?
most important when evaluating Fire prevention, firefighting, damage control and A. Use a single navigation source after another source shows a material discrepancy.
abandonment procedures? B. Assume constant bearing is harmless when range is decreasing.
A. Make several plant changes simultaneously before recording the original condition. C. Cross-check navigation sources and resolve a position discrepancy before relying on
B. Increase machinery load to see whether the abnormal indication clears. the fix, then verify the resulting state before moving to the next step.
C. Review protective-device indication, circuit condition and recent configuration D. Silence a machinery alarm and continue at the same load without investigation.
change and compare the findings with the applicable criteria. Correct Answer: C
D. Disable an alarm that is interrupting operations. Explanation: The correct choice follows a verify-act-confirm sequence. That is more
Correct Answer: C reliable than bypassing controls or making multiple uncontrolled changes.
Explanation: This is the most appropriate option because it connects the observed
condition to the governing requirement and leaves a record of why the decision was made. 52. An enclosed-space task is proposed without a completed entry check;
visibility falls below one nautical mile. Which choice demonstrates the strongest
43. A pre-departure check identifies a safety-equipment deficiency. Which control of environmental protection?
response best controls the primary risk associated with Fire prevention? A. Enter an enclosed space based only on a prior atmosphere test.
A. Cross-check navigation sources and resolve a position discrepancy before relying on B. Wash a small spill overboard rather than initiating the response process.
the fix. C. Correct a required safety-equipment deficiency and verify readiness before
B. Assume constant bearing is harmless when range is decreasing. proceeding.
C. Silence a machinery alarm and continue at the same load without investigation. D. Continue the transfer until the planned quantity is complete.
D. Use a single navigation source after another source shows a material discrepancy. Correct Answer: C
Correct Answer: A Explanation: The strongest exam-style response is the one that controls immediate risk,
Explanation: The correct choice follows a verify-act-confirm sequence. That is more checks the relevant condition, and then acts within the defined requirements for
reliable than bypassing controls or making multiple uncontrolled changes. environmental protection.
44. A pump loses discharge pressure while demand remains constant; the vessel 53. Another vessel remains on nearly constant bearing while range decreases. What
draft increases after cargo loading. Before proceeding with work involving damage is required before accepting the result related to STCW competence, drills,
control, what should be verified? records and professional watchkeeping standards?
A. Increase machinery load to see whether the abnormal indication clears. A. Continue on an uncertain position until the next scheduled fix.
B. Review protective-device indication, circuit condition and recent configuration B. Review bearing/range trend, own-ship course/speed, target aspect and applicable
change and compare the findings with the applicable criteria. rule and compare the findings with the applicable criteria.
C. Make several plant changes simultaneously before recording the original condition. C. Assume there is no risk because the other vessel is visually small.
D. Reset a protective trip repeatedly without finding the cause. D. Make a series of small course changes that are difficult to detect.
Correct Answer: B Correct Answer: B
Explanation: The strongest exam-style response is the one that controls immediate risk, Explanation: The correct response protects the integrity of the process: establish the
checks the relevant condition, and then acts within the defined requirements for damage facts, apply the appropriate control, and verify the result before closure.
control.
54. A towing or deck operation is affected by changing weather. Under these
45. A deck watch detects a change in bearing to another vessel. Which conditions, when should the issue involving STCW competence be escalated?
troubleshooting approach is most appropriate for abandonment procedures? A. Verify the loading and stability data before accepting a cargo or ballast change.
A. Use a single navigation source after another source shows a material discrepancy. B. Make an unverified ballast change solely to improve trim.
B. Assume constant bearing is harmless when range is decreasing. C. Depart with required safety equipment inoperative because the voyage is short.
C. Cross-check navigation sources and resolve a position discrepancy before relying on D. Discharge a small contaminant amount rather than initiating the response procedure.
the fix. Correct Answer: A
D. Silence a machinery alarm and continue at the same load without investigation. Explanation: This approach preserves control of the situation while producing evidence
Correct Answer: C that can confirm whether the action actually corrected the issue involving STCW
Explanation: The correct response protects the integrity of the process: establish the competence.
facts, apply the appropriate control, and verify the result before closure.
3
Duty Engineer 10004000 HP
ID14101
,USCG General Subjects Exam Module Designated Duty Engineer 10004000 HP
1. Cargo loading changes the vessel's vertical center of gravity. With respect to 10. An alarm appears after a change in plant configuration. Which action is most
Cargo operations, stowage, securing and hazards relevant to vessel type, what is likely to prevent recurrence of a problem involving damage control?
the best FIRST action? A. Make several plant changes simultaneously before recording the original condition.
A. Move heavy cargo higher to free lower deck space without recalculation. B. Increase machinery load to see whether the abnormal indication clears.
B. Correct a list by moving weight without checking stability impact. C. Compare operating pressures/temperatures, equipment status and recent changes to
C. Ignore slack-tank effects because total liquid weight is unchanged. isolate the fault safely, then confirm that the corrective action is effective before
D. Recalculate the relevant stability condition before accepting the loading or closure.
ballast change. D. Disable an alarm that is interrupting operations.
Correct Answer: D Correct Answer: C
Explanation: A defensible professional decision should be based on current evidence and Explanation: This is the most appropriate option because it connects the observed
applicable criteria. The other choices rely on assumption, remove safeguards, or change condition to the governing requirement and leaves a record of why the decision was made.
conditions before the cause is understood.
11. A towing or deck operation is affected by changing weather. Which sequence is
2. A deck load is shifted to a higher position. Which evidence is most important most appropriate when carrying out abandonment procedures?
when evaluating Cargo operations? A. Silence a machinery alarm and continue at the same load without investigation.
A. Review loading manual limits, free-surface moment and resulting draft/trim and B. Use all available means to assess collision risk and take early, substantial action
compare the findings with the applicable criteria. consistent with the applicable navigation rules, then verify the resulting state
B. Accept a loading condition based only on even draft readings. before moving to the next step.
C. Ignore slack-tank effects because total liquid weight is unchanged. C. Use a single navigation source after another source shows a material discrepancy.
D. Move heavy cargo higher to free lower deck space without recalculation. D. Assume constant bearing is harmless when range is decreasing.
Correct Answer: A Correct Answer: B
Explanation: This is the most appropriate option because it connects the observed Explanation: The correct choice follows a verify-act-confirm sequence. That is more
condition to the governing requirement and leaves a record of why the decision was made. reliable than bypassing controls or making multiple uncontrolled changes.
3. A deck watch detects a change in bearing to another vessel. Which response 12. An electrical protective device trips repeatedly; a machinery temperature
best controls the primary risk associated with hazards relevant to vessel type? rises 20 C above its normal trend. Which choice demonstrates the strongest
A. Use a single navigation source after another source shows a material discrepancy. control of Marine engineering or electrical systems applicable to the named
B. Cross-check navigation sources and resolve a position discrepancy before relying on officer/module?
the fix. A. Increase machinery load to see whether the abnormal indication clears.
C. Assume constant bearing is harmless when range is decreasing. B. Make several plant changes simultaneously before recording the original condition.
D. Silence a machinery alarm and continue at the same load without investigation. C. Reset a protective trip repeatedly without finding the cause.
Correct Answer: B D. Compare operating pressures/temperatures, equipment status and recent changes to
Explanation: The correct choice follows a verify-act-confirm sequence. That is more isolate the fault safely.
reliable than bypassing controls or making multiple uncontrolled changes. Correct Answer: D
Explanation: The strongest exam-style response is the one that controls immediate risk,
4. A spill occurs during machinery or cargo operations; a target bearing remains
checks the relevant condition, and then acts within the defined requirements for Marine
nearly constant as range decreases. Before proceeding with work involving Marine engineering or electrical systems applicable to the named officer/module.
safety systems, lifesaving appliances and emergency procedures, what should be
verified? 13. A pump loses discharge pressure while demand remains constant. What is
A. Enter an enclosed space based only on a prior atmosphere test. required before accepting the result related to Marine engineering?
B. Wash a small spill overboard rather than initiating the response process. A. Disable an alarm that is interrupting operations.
C. Review equipment inventory, inspection status and operational readiness and compare B. Reset a protective trip repeatedly without finding the cause.
the findings with the applicable criteria. C. Review pressure, temperature, lubrication, electrical load, alarm history and
D. Continue the transfer until the planned quantity is complete. equipment status and compare the findings with the applicable criteria.
Correct Answer: C D. Increase machinery load to see whether the abnormal indication clears.
Explanation: The strongest exam-style response is the one that controls immediate risk, Correct Answer: C
checks the relevant condition, and then acts within the defined requirements for Marine Explanation: The correct response protects the integrity of the process: establish the
safety systems, lifesaving appliances and emergency procedures. facts, apply the appropriate control, and verify the result before closure.
5. An enclosed-space task is proposed without a completed entry check. Which 14. An alarm occurs during machinery operation. Under these conditions, when
troubleshooting approach is most appropriate for Marine safety systems? should the issue involving electrical systems applicable to the named
A. Stop or control the operation, protect personnel and follow the required emergency officer/module be escalated?
or pollution-response procedure. A. Discharge a small contaminant amount rather than initiating the response procedure.
B. Depart with required safety equipment unavailable because conditions are calm. B. Verify the loading and stability data before accepting a cargo or ballast change.
C. Continue the transfer until the planned quantity is complete. C. Make an unverified ballast change solely to improve trim.
D. Enter an enclosed space based only on a prior atmosphere test. D. Depart with required safety equipment inoperative because the voyage is short.
Correct Answer: A Correct Answer: B
Explanation: The correct response protects the integrity of the process: establish the Explanation: This approach preserves control of the situation while producing evidence
facts, apply the appropriate control, and verify the result before closure. that can confirm whether the action actually corrected the issue involving electrical
systems applicable to the named officer/module.
6. A pollution-prevention control is compromised during operations. Which action
best supports a defensible decision about lifesaving appliances? 15. A pollution-prevention barrier is found compromised during transfer. Which
A. Make an unverified ballast change solely to improve trim. comparison is most useful for interpreting Pollution prevention, MARPOL
B. Depart with required safety equipment inoperative because the voyage is short. principles and environmental protection?
C. Discharge a small contaminant amount rather than initiating the response procedure. A. Continue the transfer until the planned quantity is complete.
D. Verify the loading and stability data before accepting a cargo or ballast change. B. Review source/quantity of release, containment condition, notifications and
Correct Answer: D response equipment and compare the findings with the applicable criteria.
Explanation: This approach preserves control of the situation while producing evidence C. Depart with required safety equipment unavailable because conditions are calm.
that can confirm whether the action actually corrected the issue involving lifesaving D. Wash a small spill overboard rather than initiating the response process.
appliances. Correct Answer: B
Explanation: This answer uses verified evidence before action, which reduces the chance
7. A spill occurs during machinery or cargo operations. A change affecting
of masking the real problem and supports a traceable decision about Pollution
emergency procedures is being considered. How should it be handled? prevention, MARPOL principles and environmental protection.
A. Continue the transfer until the planned quantity is complete.
B. Depart with required safety equipment unavailable because conditions are calm. 16. Required lifesaving equipment is not ready before departure; the vessel draft
C. Wash a small spill overboard rather than initiating the response process. increases after cargo loading. Which action best distinguishes the underlying
D. Stop or control the operation, protect personnel and follow the required emergency cause from a symptom in Pollution prevention?
or pollution-response procedure. A. Enter an enclosed space based only on a prior atmosphere test.
Correct Answer: D B. Wash a small spill overboard rather than initiating the response process.
Explanation: This answer uses verified evidence before action, which reduces the chance C. Continue the transfer until the planned quantity is complete.
of masking the real problem and supports a traceable decision about emergency D. Correct a required safety-equipment deficiency and verify readiness before
procedures. proceeding, then confirm that the corrective action is effective before closure.
Correct Answer: D
8. A pump loses discharge pressure while demand remains constant; visibility
Explanation: The selected action best supports safe, compliant, and technically sound
falls below one nautical mile. The abnormal condition directly affects Fire
performance because it addresses Pollution prevention using observable evidence rather
prevention, firefighting, damage control and abandonment procedures. What is the than convenience.
most appropriate response?
A. Increase machinery load to see whether the abnormal indication clears. 17. A vessel approaches restricted visibility with traffic nearby. Which response
B. Compare operating pressures/temperatures, equipment status and recent changes to is most consistent with the professional or compliance requirements governing
isolate the fault safely. MARPOL principles?
C. Make several plant changes simultaneously before recording the original condition. A. Silence a machinery alarm and continue at the same load without investigation.
D. Reset a protective trip repeatedly without finding the cause. B. Use a single navigation source after another source shows a material discrepancy.
Correct Answer: B C. Cross-check navigation sources and resolve a position discrepancy before relying on
Explanation: The selected action best supports safe, compliant, and technically sound the fix.
performance because it addresses Fire prevention, firefighting, damage control and D. Assume constant bearing is harmless when range is decreasing.
abandonment procedures using observable evidence rather than convenience. Correct Answer: C
Explanation: A defensible professional decision should be based on current evidence and
9. A vessel approaches restricted visibility with traffic nearby. Which
applicable criteria. The other choices rely on assumption, remove safeguards, or change
documentation approach best supports traceability for Fire prevention? conditions before the cause is understood.
A. Record the observed condition, supporting evidence, decision and responsible
follow-up; communicate any unresolved risk to the next responsible person. 18. A pollution-prevention barrier is found compromised during transfer. Which
B. Use a single navigation source after another source shows a material discrepancy. handoff practice best reduces error risk for environmental protection?
C. Assume constant bearing is harmless when range is decreasing. A. Wash a small spill overboard rather than initiating the response process.
D. Silence a machinery alarm and continue at the same load without investigation. B. Record the observed condition, supporting evidence, decision and responsible
Correct Answer: A follow-up; communicate any unresolved risk to the next responsible person.
Explanation: A defensible professional decision should be based on current evidence and C. Enter an enclosed space based only on a prior atmosphere test.
applicable criteria. The other choices rely on assumption, remove safeguards, or change D. Depart with required safety equipment unavailable because conditions are calm.
conditions before the cause is understood. Correct Answer: B
Explanation: This is the most appropriate option because it connects the observed
condition to the governing requirement and leaves a record of why the decision was made.
1
,USCG General Subjects Exam Module Designated Duty Engineer 10004000 HP
19. A position fix disagrees with the expected track. Which decision about STCW 28. The vessel approaches a traffic or pilotage constraint; visibility falls
competence, drills, records and professional watchkeeping standards is best below one nautical mile. The abnormal condition directly affects Navigation
supported by the available evidence? rules, watchkeeping responsibilities and bridge resource management. What is the
A. Assume there is no risk because the other vessel is visually small. most appropriate response?
B. Use all available means to determine collision risk and take early, substantial A. Cross-check position, traffic and navigation sources before altering the passage
action consistent with the applicable navigation rules. plan.
C. Continue on an uncertain position until the next scheduled fix. B. Make a series of small course changes that are difficult to detect.
D. Rely on one electronic source when independent information conflicts. C. Rely on one electronic source when independent information conflicts.
Correct Answer: B D. Assume there is no risk because the other vessel is visually small.
Explanation: The correct choice follows a verify-act-confirm sequence. That is more Correct Answer: A
reliable than bypassing controls or making multiple uncontrolled changes. Explanation: The strongest exam-style response is the one that controls immediate risk,
checks the relevant condition, and then acts within the defined requirements for
20. An engineering watch observes an abnormal temperature or pressure; the vessel Navigation rules, watchkeeping responsibilities and bridge resource management.
draft increases after cargo loading. Which review step adds the most value before
closing work involving STCW competence? 29. Visibility falls and several targets appear on radar. Which documentation
A. Discharge a small contaminant amount rather than initiating the response procedure. approach best supports traceability for Navigation rules?
B. Make an unverified ballast change solely to improve trim. A. Continue on an uncertain position until the next scheduled fix.
C. Depart with required safety equipment inoperative because the voyage is short. B. Assume there is no risk because the other vessel is visually small.
D. Verify the loading and stability data before accepting a cargo or ballast change, C. Record the observed condition, supporting evidence, decision and responsible
then confirm that the corrective action is effective before closure. follow-up; communicate any unresolved risk to the next responsible person.
Correct Answer: D D. Make a series of small course changes that are difficult to detect.
Explanation: The strongest exam-style response is the one that controls immediate risk, Correct Answer: C
checks the relevant condition, and then acts within the defined requirements for STCW Explanation: The correct response protects the integrity of the process: establish the
competence. facts, apply the appropriate control, and verify the result before closure.
21. Visibility falls and several targets appear on radar. With respect to 30. Visibility falls and several targets appear on radar. Which action is most
professional watchkeeping standards, what is the best FIRST action? likely to prevent recurrence of a problem involving watchkeeping
A. Continue on an uncertain position until the next scheduled fix. responsibilities?
B. Use all available means to determine collision risk and take early, substantial A. Rely on one electronic source when independent information conflicts.
action consistent with the applicable navigation rules. B. Make a series of small course changes that are difficult to detect.
C. Assume there is no risk because the other vessel is visually small. C. Cross-check position, traffic and navigation sources before altering the passage
D. Make a series of small course changes that are difficult to detect. plan, then confirm that the corrective action is effective before closure.
Correct Answer: B D. Continue on an uncertain position until the next scheduled fix.
Explanation: The correct response protects the integrity of the process: establish the Correct Answer: C
facts, apply the appropriate control, and verify the result before closure. Explanation: This approach preserves control of the situation while producing evidence
that can confirm whether the action actually corrected the issue involving watchkeeping
22. An engineering watch observes an abnormal temperature or pressure. Which responsibilities.
evidence is most important when evaluating Communications, GMDSS awareness and
distress/urgency procedures? 31. A stability calculation is required after cargo or ballast changes. Which
A. Depart with required safety equipment inoperative because the voyage is short. sequence is most appropriate when carrying out bridge resource management?
B. Review required safety equipment and readiness before departure and compare the A. Assume constant bearing is harmless when range is decreasing.
findings with the applicable criteria. B. Respond to an abnormal machinery indication by protecting the plant, confirming the
C. Discharge a small contaminant amount rather than initiating the response procedure. indication and following the operating procedure, then verify the resulting state
D. Make an unverified ballast change solely to improve trim. before moving to the next step.
Correct Answer: B C. Silence a machinery alarm and continue at the same load without investigation.
Explanation: This approach preserves control of the situation while producing evidence D. Use a single navigation source after another source shows a material discrepancy.
that can confirm whether the action actually corrected the issue involving Correct Answer: B
Communications, GMDSS awareness and distress/urgency procedures. Explanation: This answer uses verified evidence before action, which reduces the chance
of masking the real problem and supports a traceable decision about bridge resource
23. A towing or deck operation is affected by changing weather. Which response management.
best controls the primary risk associated with GMDSS awareness?
A. Cross-check navigation sources and resolve a position discrepancy before relying on 32. A navigation fix does not agree with another available source; the vessel
the fix. draft increases after cargo loading. Which choice demonstrates the strongest
B. Silence a machinery alarm and continue at the same load without investigation. control of Chartwork, publications, voyage planning and position fixing?
C. Use a single navigation source after another source shows a material discrepancy. A. Discharge a small contaminant amount rather than initiating the response procedure.
D. Assume constant bearing is harmless when range is decreasing. B. Verify the loading and stability data before accepting a cargo or ballast change.
Correct Answer: A C. Make an unverified ballast change solely to improve trim.
Explanation: This answer uses verified evidence before action, which reduces the chance D. Depart with required safety equipment inoperative because the voyage is short.
of masking the real problem and supports a traceable decision about GMDSS awareness. Correct Answer: B
Explanation: The selected action best supports safe, compliant, and technically sound
24. A pre-departure check identifies a safety-equipment deficiency; a navigation performance because it addresses Chartwork, publications, voyage planning and position
fix differs by 0.8 nautical mile from another source. Before proceeding with work fixing using observable evidence rather than convenience.
involving distress/urgency procedures, what should be verified?
A. Make an unverified ballast change solely to improve trim. 33. A stability calculation is required after cargo or ballast changes. What is
B. Depart with required safety equipment inoperative because the voyage is short. required before accepting the result related to voyage planning?
C. Review stability data, loading condition and free-surface effects and compare the A. Review weather, tide/current, under-keel clearance and route hazards and compare
findings with the applicable criteria. the findings with the applicable criteria.
D. Discharge a small contaminant amount rather than initiating the response procedure. B. Use a single navigation source after another source shows a material discrepancy.
Correct Answer: C C. Assume constant bearing is harmless when range is decreasing.
Explanation: The selected action best supports safe, compliant, and technically sound D. Silence a machinery alarm and continue at the same load without investigation.
performance because it addresses distress/urgency procedures using observable evidence Correct Answer: A
rather than convenience. Explanation: A defensible professional decision should be based on current evidence and
applicable criteria. The other choices rely on assumption, remove safeguards, or change
25. A position fix disagrees with the expected track. Which troubleshooting conditions before the cause is understood.
approach is most appropriate for Collision avoidance, maneuvering, pilotage and
restricted-water operations? 34. A towing or deck operation is affected by changing weather. Under these
A. Continue on an uncertain position until the next scheduled fix. conditions, when should the issue involving position fixing be escalated?
B. Assume there is no risk because the other vessel is visually small. A. Depart with required safety equipment inoperative because the voyage is short.
C. Make a series of small course changes that are difficult to detect. B. Verify the loading and stability data before accepting a cargo or ballast change.
D. Use all available means to determine collision risk and take early, substantial C. Discharge a small contaminant amount rather than initiating the response procedure.
action consistent with the applicable navigation rules. D. Make an unverified ballast change solely to improve trim.
Correct Answer: D Correct Answer: B
Explanation: A defensible professional decision should be based on current evidence and Explanation: This is the most appropriate option because it connects the observed
applicable criteria. The other choices rely on assumption, remove safeguards, or change condition to the governing requirement and leaves a record of why the decision was made.
conditions before the cause is understood.
35. Ballast is proposed to correct a list. Which comparison is most useful for
26. Visibility falls and several targets appear on radar. Which action best interpreting Cargo operations, stowage, securing and hazards relevant to vessel
supports a defensible decision about Collision avoidance? type?
A. Rely on one electronic source when independent information conflicts. A. Review displacement, weight location, GM/stability data and tank condition and
B. Make a series of small course changes that are difficult to detect. compare the findings with the applicable criteria.
C. Cross-check position, traffic and navigation sources before altering the passage B. Correct a list by moving weight without checking stability impact.
plan. C. Move heavy cargo higher to free lower deck space without recalculation.
D. Continue on an uncertain position until the next scheduled fix. D. Accept a loading condition based only on even draft readings.
Correct Answer: C Correct Answer: A
Explanation: This is the most appropriate option because it connects the observed Explanation: The correct choice follows a verify-act-confirm sequence. That is more
condition to the governing requirement and leaves a record of why the decision was made. reliable than bypassing controls or making multiple uncontrolled changes.
27. A vessel must plan a passage through constrained waters. A change affecting 36. A slack tank creates additional free-surface effect; the vessel draft
restricted-water operations is being considered. How should it be handled? increases after cargo loading. Which action best distinguishes the underlying
A. Use a single navigation source after another source shows a material discrepancy. cause from a symptom in Cargo operations?
B. Assume constant bearing is harmless when range is decreasing. A. Account for free-surface and weight-shift effects when evaluating stability and
C. Cross-check navigation sources and resolve a position discrepancy before relying on trim, then confirm that the corrective action is effective before closure.
the fix. B. Ignore slack-tank effects because total liquid weight is unchanged.
D. Silence a machinery alarm and continue at the same load without investigation. C. Accept a loading condition based only on even draft readings.
Correct Answer: C D. Correct a list by moving weight without checking stability impact.
Explanation: The correct choice follows a verify-act-confirm sequence. That is more Correct Answer: A
reliable than bypassing controls or making multiple uncontrolled changes. Explanation: The strongest exam-style response is the one that controls immediate risk,
checks the relevant condition, and then acts within the defined requirements for Cargo
operations.
2
, USCG General Subjects Exam Module Designated Duty Engineer 10004000 HP
37. A vessel must plan a passage through constrained waters. Which response is 46. A machinery temperature rises above its normal operating trend. Which action
most consistent with the professional or compliance requirements governing best supports a defensible decision about Marine engineering or electrical
hazards relevant to vessel type? systems applicable to the named officer/module?
A. Assume constant bearing is harmless when range is decreasing. A. Compare operating pressures/temperatures, equipment status and recent changes to
B. Silence a machinery alarm and continue at the same load without investigation. isolate the fault safely.
C. Cross-check navigation sources and resolve a position discrepancy before relying on B. Make several plant changes simultaneously before recording the original condition.
the fix. C. Increase machinery load to see whether the abnormal indication clears.
D. Use a single navigation source after another source shows a material discrepancy. D. Disable an alarm that is interrupting operations.
Correct Answer: C Correct Answer: A
Explanation: The correct response protects the integrity of the process: establish the Explanation: This approach preserves control of the situation while producing evidence
facts, apply the appropriate control, and verify the result before closure. that can confirm whether the action actually corrected the issue involving Marine
engineering or electrical systems applicable to the named officer/module.
38. Required lifesaving equipment is not ready before departure. Which handoff
practice best reduces error risk for Marine safety systems, lifesaving appliances 47. An alarm appears after a change in plant configuration. A change affecting
and emergency procedures? Marine engineering is being considered. How should it be handled?
A. Wash a small spill overboard rather than initiating the response process. A. Reset a protective trip repeatedly without finding the cause.
B. Enter an enclosed space based only on a prior atmosphere test. B. Disable an alarm that is interrupting operations.
C. Record the observed condition, supporting evidence, decision and responsible C. Make several plant changes simultaneously before recording the original condition.
follow-up; communicate any unresolved risk to the next responsible person. D. Protect the plant, verify the indication and diagnose the affected system before
D. Depart with required safety equipment unavailable because conditions are calm. resetting or increasing load.
Correct Answer: C Correct Answer: D
Explanation: This approach preserves control of the situation while producing evidence Explanation: This answer uses verified evidence before action, which reduces the chance
that can confirm whether the action actually corrected the issue involving Marine safety of masking the real problem and supports a traceable decision about Marine engineering.
systems, lifesaving appliances and emergency procedures.
48. A vessel approaches restricted visibility with traffic nearby; visibility
39. A pollution-prevention barrier is found compromised during transfer. Which falls below one nautical mile. The abnormal condition directly affects electrical
decision about Marine safety systems is best supported by the available evidence? systems applicable to the named officer/module. What is the most appropriate
A. Continue the transfer until the planned quantity is complete. response?
B. Stop or control the operation, protect personnel and follow the required emergency A. Make an unverified ballast change solely to improve trim.
or pollution-response procedure. B. Depart with required safety equipment inoperative because the voyage is short.
C. Depart with required safety equipment unavailable because conditions are calm. C. Verify the loading and stability data before accepting a cargo or ballast change.
D. Wash a small spill overboard rather than initiating the response process. D. Discharge a small contaminant amount rather than initiating the response procedure.
Correct Answer: B Correct Answer: C
Explanation: This answer uses verified evidence before action, which reduces the chance Explanation: The selected action best supports safe, compliant, and technically sound
of masking the real problem and supports a traceable decision about Marine safety performance because it addresses electrical systems applicable to the named
systems. officer/module using observable evidence rather than convenience.
40. An engineering watch observes an abnormal temperature or pressure; the vessel 49. An enclosed-space task is proposed without a completed entry check. Which
draft increases after cargo loading. Which review step adds the most value before documentation approach best supports traceability for Pollution prevention,
closing work involving lifesaving appliances? MARPOL principles and environmental protection?
A. Depart with required safety equipment inoperative because the voyage is short. A. Depart with required safety equipment unavailable because conditions are calm.
B. Discharge a small contaminant amount rather than initiating the response procedure. B. Continue the transfer until the planned quantity is complete.
C. Make an unverified ballast change solely to improve trim. C. Enter an enclosed space based only on a prior atmosphere test.
D. Verify the loading and stability data before accepting a cargo or ballast change, D. Record the observed condition, supporting evidence, decision and responsible
then confirm that the corrective action is effective before closure. follow-up; communicate any unresolved risk to the next responsible person.
Correct Answer: D Correct Answer: D
Explanation: The selected action best supports safe, compliant, and technically sound Explanation: A defensible professional decision should be based on current evidence and
performance because it addresses lifesaving appliances using observable evidence rather applicable criteria. The other choices rely on assumption, remove safeguards, or change
than convenience. conditions before the cause is understood.
41. Required lifesaving equipment is not ready before departure. With respect to 50. A spill occurs during machinery or cargo operations. Which action is most
emergency procedures, what is the best FIRST action? likely to prevent recurrence of a problem involving Pollution prevention?
A. Depart with required safety equipment unavailable because conditions are calm. A. Correct a required safety-equipment deficiency and verify readiness before
B. Stop or control the operation, protect personnel and follow the required emergency proceeding, then confirm that the corrective action is effective before closure.
or pollution-response procedure. B. Wash a small spill overboard rather than initiating the response process.
C. Continue the transfer until the planned quantity is complete. C. Enter an enclosed space based only on a prior atmosphere test.
D. Enter an enclosed space based only on a prior atmosphere test. D. Depart with required safety equipment unavailable because conditions are calm.
Correct Answer: B Correct Answer: A
Explanation: A defensible professional decision should be based on current evidence and Explanation: This is the most appropriate option because it connects the observed
applicable criteria. The other choices rely on assumption, remove safeguards, or change condition to the governing requirement and leaves a record of why the decision was made.
conditions before the cause is understood.
51. A pre-departure check identifies a safety-equipment deficiency. Which
42. An alarm appears after a change in plant configuration. Which evidence is sequence is most appropriate when carrying out MARPOL principles?
most important when evaluating Fire prevention, firefighting, damage control and A. Use a single navigation source after another source shows a material discrepancy.
abandonment procedures? B. Assume constant bearing is harmless when range is decreasing.
A. Make several plant changes simultaneously before recording the original condition. C. Cross-check navigation sources and resolve a position discrepancy before relying on
B. Increase machinery load to see whether the abnormal indication clears. the fix, then verify the resulting state before moving to the next step.
C. Review protective-device indication, circuit condition and recent configuration D. Silence a machinery alarm and continue at the same load without investigation.
change and compare the findings with the applicable criteria. Correct Answer: C
D. Disable an alarm that is interrupting operations. Explanation: The correct choice follows a verify-act-confirm sequence. That is more
Correct Answer: C reliable than bypassing controls or making multiple uncontrolled changes.
Explanation: This is the most appropriate option because it connects the observed
condition to the governing requirement and leaves a record of why the decision was made. 52. An enclosed-space task is proposed without a completed entry check;
visibility falls below one nautical mile. Which choice demonstrates the strongest
43. A pre-departure check identifies a safety-equipment deficiency. Which control of environmental protection?
response best controls the primary risk associated with Fire prevention? A. Enter an enclosed space based only on a prior atmosphere test.
A. Cross-check navigation sources and resolve a position discrepancy before relying on B. Wash a small spill overboard rather than initiating the response process.
the fix. C. Correct a required safety-equipment deficiency and verify readiness before
B. Assume constant bearing is harmless when range is decreasing. proceeding.
C. Silence a machinery alarm and continue at the same load without investigation. D. Continue the transfer until the planned quantity is complete.
D. Use a single navigation source after another source shows a material discrepancy. Correct Answer: C
Correct Answer: A Explanation: The strongest exam-style response is the one that controls immediate risk,
Explanation: The correct choice follows a verify-act-confirm sequence. That is more checks the relevant condition, and then acts within the defined requirements for
reliable than bypassing controls or making multiple uncontrolled changes. environmental protection.
44. A pump loses discharge pressure while demand remains constant; the vessel 53. Another vessel remains on nearly constant bearing while range decreases. What
draft increases after cargo loading. Before proceeding with work involving damage is required before accepting the result related to STCW competence, drills,
control, what should be verified? records and professional watchkeeping standards?
A. Increase machinery load to see whether the abnormal indication clears. A. Continue on an uncertain position until the next scheduled fix.
B. Review protective-device indication, circuit condition and recent configuration B. Review bearing/range trend, own-ship course/speed, target aspect and applicable
change and compare the findings with the applicable criteria. rule and compare the findings with the applicable criteria.
C. Make several plant changes simultaneously before recording the original condition. C. Assume there is no risk because the other vessel is visually small.
D. Reset a protective trip repeatedly without finding the cause. D. Make a series of small course changes that are difficult to detect.
Correct Answer: B Correct Answer: B
Explanation: The strongest exam-style response is the one that controls immediate risk, Explanation: The correct response protects the integrity of the process: establish the
checks the relevant condition, and then acts within the defined requirements for damage facts, apply the appropriate control, and verify the result before closure.
control.
54. A towing or deck operation is affected by changing weather. Under these
45. A deck watch detects a change in bearing to another vessel. Which conditions, when should the issue involving STCW competence be escalated?
troubleshooting approach is most appropriate for abandonment procedures? A. Verify the loading and stability data before accepting a cargo or ballast change.
A. Use a single navigation source after another source shows a material discrepancy. B. Make an unverified ballast change solely to improve trim.
B. Assume constant bearing is harmless when range is decreasing. C. Depart with required safety equipment inoperative because the voyage is short.
C. Cross-check navigation sources and resolve a position discrepancy before relying on D. Discharge a small contaminant amount rather than initiating the response procedure.
the fix. Correct Answer: A
D. Silence a machinery alarm and continue at the same load without investigation. Explanation: This approach preserves control of the situation while producing evidence
Correct Answer: C that can confirm whether the action actually corrected the issue involving STCW
Explanation: The correct response protects the integrity of the process: establish the competence.
facts, apply the appropriate control, and verify the result before closure.
3
