Swedish Transport Agency Part-66 Basic
Knowledge Exam – Module 15: Gas Turbine
Engine
,1. What should occur before normal work resumes after a safety concern involving Maintenance safety, preservation, inspection and
ground-run precautions with emphasis on boundaries during an incident or deviation follow-up? Before release, 46 checks are
reviewed and 2 remain open even though the scheduled decision is due within 53 hours.
A. Place the activity in a safe condition, control the immediate hazard, apply the approved safeguard, and verify conditions before
restarting.
B. Record the hazard after completion but do not interrupt the current operation.
C. Continue the activity until the scheduled break and review the concern afterward.
D. Temporarily bypass the protective control so the task can be completed on time.
Correct Answer: A
Explanation: The first priority for Maintenance safety, preservation, inspection and ground-run precautions is control of immediate risk.
Work should not resume until the hazard is stabilized, the required safeguard is in place, and its effectiveness has been verified.
2. Before accepting a calculated limit involving Engine operating cycles, efficiency and performance variables for defensible
calculations and, what should be confirmed during a technical documentation review? The responsible practitioner receives 18
observations from two sources, with a 28% difference in the most critical value.
A. Ignore unit or assumption differences if the final number appears reasonable.
B. Average conflicting results and accept the midpoint without checking the source data.
C. Adjust an input until the result falls within the target range and record only the final value.
D. Confirm the current inputs and approved method, repeat the calculation with an independent reasonableness check, and resolve
any difference.
Correct Answer: D
Explanation: For Engine operating cycles, efficiency and performance variables for, changed inputs require a fresh calculation using
the approved method. Checking units and reasonableness makes the result reproducible and defensible.
3. Which review method is most likely to identify a weakness involving Intake, compression, combustion, turbine and exhaust
functions including recognition of abnormal or during a supervised practical activity? A sample of 31 items is examined; 4 show a
different condition, and the supporting record is 15 hours old.
A. Repeat only the final step without checking the underlying inputs, records, or controls.
B. Use current source records and direct evidence, obtain additional verification where needed, and escalate unresolved risk before
approval.
C. Rely on verbal assurance from an experienced colleague instead of checking current evidence.
D. Change the acceptance criterion to match the observed condition without formal authorization.
Correct Answer: B
Explanation: The key principle in Intake, compression, combustion, turbine and exhaust functions including is to verify before
accepting. Current evidence, documented reasoning, and closure of open issues provide the strongest professional basis for the next
step.
Swedish Transport Agency Part-66 Basic Knowledge Exam – Module 15: Gas Turbine Engine
Page 2
,4. A team proposes a shortcut involving Piston, valve, ignition, induction, lubrication and cooling systems to support reliable, ethical.
Which response is most appropriate during final verification before release or acceptance? The field condition and the approved
record agree on most points, but 5 of 44 checked elements require reconciliation.
A. Treat the issue as administrative and continue while the technical evidence remains unresolved.
B. Change the acceptance criterion to match the observed condition without formal authorization.
C. Repeat only the final step without checking the underlying inputs, records, or controls.
D. Reassess the work against the governing procedure, confirm critical evidence, and document the conclusion before acceptance.
Correct Answer: D
Explanation: When Piston, valve, ignition, induction, lubrication and cooling systems to is uncertain, the practitioner should investigate
and document rather than bypass the control. This supports consistent, reviewable, and technically justified work.
5. What provides the strongest assurance that a result involving Propeller geometry, pitch control, governing and aerodynamic loads
integrated across the tasks is numerically defensible during pre-task planning? The result is within the usual range, but 6 required
verification step(s) are not yet documented across 16 reviewed items.
A. Use the previous calculation unchanged even though one or more current inputs have changed.
B. Verify source data, units, assumptions, and limits; recalculate independently and document the checked result before using it.
C. Select the most favorable result from repeated calculations without investigating the variation.
D. Proceed using an estimate even though current source data and the approved method are available.
Correct Answer: B
Explanation: A result involving Propeller geometry, pitch control, governing and aerodynamic loads is only reliable when its inputs,
units, assumptions, and method are verified. An independent recalculation reduces the risk of carrying an unnoticed numerical error
into the decision.
6. Before accepting a calculated limit involving Fuel metering, engine control and starting sequences within the aircraft propulsion,
what should be confirmed during a field or operational inspection? A second reviewer checks 29 entries and identifies 1 unresolved
differences that could affect the final decision.
A. Average conflicting results and accept the midpoint without checking the source data.
B. Proceed using an estimate even though current source data and the approved method are available.
C. Use the previous calculation unchanged even though one or more current inputs have changed.
D. Confirm the current inputs and approved method, repeat the calculation with an independent reasonableness check, and resolve
any difference.
Correct Answer: D
Explanation: For Fuel metering, engine control and starting sequences within the aircraft, changed inputs require a fresh calculation
using the approved method. Checking units and reasonableness makes the result reproducible and defensible.
Swedish Transport Agency Part-66 Basic Knowledge Exam – Module 15: Gas Turbine Engine
Page 3
, 7. What should happen when a required control check affecting Instrument indications, operating limitations and trend monitoring as
applied to aircraft propulsion is outside its acceptable condition during a routine quality-control review? Operating conditions changed
11 hours ago, and a previous assumption now differs from the current observation by 12%.
A. Change the sensitivity or acceptance limit without authorization to make the result easier to accept.
B. Accept the result if it matches the expected outcome even though a required control check is invalid.
C. Repeat the test until a passing result is obtained and discard inconsistent earlier results.
D. Hold the result, confirm that required test controls were satisfied, repeat the affected step when justified, and preserve full
traceability.
Correct Answer: D
Explanation: The integrity of Instrument indications, operating limitations and trend monitoring as depends on controlled test
conditions and complete records. An invalid control check must be resolved before a result is accepted.
8. Before accepting a calculated limit involving Plant emergencies involving low water, flame failure, overpressure and equipment trip
with, what should be confirmed during a shift or responsibility handover? The work is near completion when a discrepancy is found in
3 of 14 records selected for acceptance review.
A. Ignore unit or assumption differences if the final number appears reasonable.
B. Average conflicting results and accept the midpoint without checking the source data.
C. Pause the dependent decision, reconcile changed inputs, recalculate using the current method, and obtain a second check for
critical results.
D. Adjust an input until the result falls within the target range and record only the final value.
Correct Answer: C
Explanation: Calculations for Plant emergencies involving low water, flame failure, overpressure and depend on current data and
controlled assumptions. Reconciliation and a second check are appropriate before the result supports acceptance or release.
9. What provides the strongest assurance that a result involving Thermodynamics, heat transfer, fluid mechanics and plant-cycle
calculations for safe, accurate work is numerically defensible during an incident or deviation follow-up? The procedure is current, but
the observed condition differs from the documented baseline by 13% and affects 4 related items.
A. Select the most favorable result from repeated calculations without investigating the variation.
B. Verify source data, units, assumptions, and limits; recalculate independently and document the checked result before using it.
C. Adjust an input until the result falls within the target range and record only the final value.
D. Ignore unit or assumption differences if the final number appears reasonable.
Correct Answer: B
Explanation: A result involving Thermodynamics, heat transfer, fluid mechanics and plant-cycle calculations is only reliable when its
inputs, units, assumptions, and method are verified. An independent recalculation reduces the risk of carrying an unnoticed numerical
error into the decision.
Swedish Transport Agency Part-66 Basic Knowledge Exam – Module 15: Gas Turbine Engine
Page 4
Knowledge Exam – Module 15: Gas Turbine
Engine
,1. What should occur before normal work resumes after a safety concern involving Maintenance safety, preservation, inspection and
ground-run precautions with emphasis on boundaries during an incident or deviation follow-up? Before release, 46 checks are
reviewed and 2 remain open even though the scheduled decision is due within 53 hours.
A. Place the activity in a safe condition, control the immediate hazard, apply the approved safeguard, and verify conditions before
restarting.
B. Record the hazard after completion but do not interrupt the current operation.
C. Continue the activity until the scheduled break and review the concern afterward.
D. Temporarily bypass the protective control so the task can be completed on time.
Correct Answer: A
Explanation: The first priority for Maintenance safety, preservation, inspection and ground-run precautions is control of immediate risk.
Work should not resume until the hazard is stabilized, the required safeguard is in place, and its effectiveness has been verified.
2. Before accepting a calculated limit involving Engine operating cycles, efficiency and performance variables for defensible
calculations and, what should be confirmed during a technical documentation review? The responsible practitioner receives 18
observations from two sources, with a 28% difference in the most critical value.
A. Ignore unit or assumption differences if the final number appears reasonable.
B. Average conflicting results and accept the midpoint without checking the source data.
C. Adjust an input until the result falls within the target range and record only the final value.
D. Confirm the current inputs and approved method, repeat the calculation with an independent reasonableness check, and resolve
any difference.
Correct Answer: D
Explanation: For Engine operating cycles, efficiency and performance variables for, changed inputs require a fresh calculation using
the approved method. Checking units and reasonableness makes the result reproducible and defensible.
3. Which review method is most likely to identify a weakness involving Intake, compression, combustion, turbine and exhaust
functions including recognition of abnormal or during a supervised practical activity? A sample of 31 items is examined; 4 show a
different condition, and the supporting record is 15 hours old.
A. Repeat only the final step without checking the underlying inputs, records, or controls.
B. Use current source records and direct evidence, obtain additional verification where needed, and escalate unresolved risk before
approval.
C. Rely on verbal assurance from an experienced colleague instead of checking current evidence.
D. Change the acceptance criterion to match the observed condition without formal authorization.
Correct Answer: B
Explanation: The key principle in Intake, compression, combustion, turbine and exhaust functions including is to verify before
accepting. Current evidence, documented reasoning, and closure of open issues provide the strongest professional basis for the next
step.
Swedish Transport Agency Part-66 Basic Knowledge Exam – Module 15: Gas Turbine Engine
Page 2
,4. A team proposes a shortcut involving Piston, valve, ignition, induction, lubrication and cooling systems to support reliable, ethical.
Which response is most appropriate during final verification before release or acceptance? The field condition and the approved
record agree on most points, but 5 of 44 checked elements require reconciliation.
A. Treat the issue as administrative and continue while the technical evidence remains unresolved.
B. Change the acceptance criterion to match the observed condition without formal authorization.
C. Repeat only the final step without checking the underlying inputs, records, or controls.
D. Reassess the work against the governing procedure, confirm critical evidence, and document the conclusion before acceptance.
Correct Answer: D
Explanation: When Piston, valve, ignition, induction, lubrication and cooling systems to is uncertain, the practitioner should investigate
and document rather than bypass the control. This supports consistent, reviewable, and technically justified work.
5. What provides the strongest assurance that a result involving Propeller geometry, pitch control, governing and aerodynamic loads
integrated across the tasks is numerically defensible during pre-task planning? The result is within the usual range, but 6 required
verification step(s) are not yet documented across 16 reviewed items.
A. Use the previous calculation unchanged even though one or more current inputs have changed.
B. Verify source data, units, assumptions, and limits; recalculate independently and document the checked result before using it.
C. Select the most favorable result from repeated calculations without investigating the variation.
D. Proceed using an estimate even though current source data and the approved method are available.
Correct Answer: B
Explanation: A result involving Propeller geometry, pitch control, governing and aerodynamic loads is only reliable when its inputs,
units, assumptions, and method are verified. An independent recalculation reduces the risk of carrying an unnoticed numerical error
into the decision.
6. Before accepting a calculated limit involving Fuel metering, engine control and starting sequences within the aircraft propulsion,
what should be confirmed during a field or operational inspection? A second reviewer checks 29 entries and identifies 1 unresolved
differences that could affect the final decision.
A. Average conflicting results and accept the midpoint without checking the source data.
B. Proceed using an estimate even though current source data and the approved method are available.
C. Use the previous calculation unchanged even though one or more current inputs have changed.
D. Confirm the current inputs and approved method, repeat the calculation with an independent reasonableness check, and resolve
any difference.
Correct Answer: D
Explanation: For Fuel metering, engine control and starting sequences within the aircraft, changed inputs require a fresh calculation
using the approved method. Checking units and reasonableness makes the result reproducible and defensible.
Swedish Transport Agency Part-66 Basic Knowledge Exam – Module 15: Gas Turbine Engine
Page 3
, 7. What should happen when a required control check affecting Instrument indications, operating limitations and trend monitoring as
applied to aircraft propulsion is outside its acceptable condition during a routine quality-control review? Operating conditions changed
11 hours ago, and a previous assumption now differs from the current observation by 12%.
A. Change the sensitivity or acceptance limit without authorization to make the result easier to accept.
B. Accept the result if it matches the expected outcome even though a required control check is invalid.
C. Repeat the test until a passing result is obtained and discard inconsistent earlier results.
D. Hold the result, confirm that required test controls were satisfied, repeat the affected step when justified, and preserve full
traceability.
Correct Answer: D
Explanation: The integrity of Instrument indications, operating limitations and trend monitoring as depends on controlled test
conditions and complete records. An invalid control check must be resolved before a result is accepted.
8. Before accepting a calculated limit involving Plant emergencies involving low water, flame failure, overpressure and equipment trip
with, what should be confirmed during a shift or responsibility handover? The work is near completion when a discrepancy is found in
3 of 14 records selected for acceptance review.
A. Ignore unit or assumption differences if the final number appears reasonable.
B. Average conflicting results and accept the midpoint without checking the source data.
C. Pause the dependent decision, reconcile changed inputs, recalculate using the current method, and obtain a second check for
critical results.
D. Adjust an input until the result falls within the target range and record only the final value.
Correct Answer: C
Explanation: Calculations for Plant emergencies involving low water, flame failure, overpressure and depend on current data and
controlled assumptions. Reconciliation and a second check are appropriate before the result supports acceptance or release.
9. What provides the strongest assurance that a result involving Thermodynamics, heat transfer, fluid mechanics and plant-cycle
calculations for safe, accurate work is numerically defensible during an incident or deviation follow-up? The procedure is current, but
the observed condition differs from the documented baseline by 13% and affects 4 related items.
A. Select the most favorable result from repeated calculations without investigating the variation.
B. Verify source data, units, assumptions, and limits; recalculate independently and document the checked result before using it.
C. Adjust an input until the result falls within the target range and record only the final value.
D. Ignore unit or assumption differences if the final number appears reasonable.
Correct Answer: B
Explanation: A result involving Thermodynamics, heat transfer, fluid mechanics and plant-cycle calculations is only reliable when its
inputs, units, assumptions, and method are verified. An independent recalculation reduces the risk of carrying an unnoticed numerical
error into the decision.
Swedish Transport Agency Part-66 Basic Knowledge Exam – Module 15: Gas Turbine Engine
Page 4
