Direction Générale de l’Aviation
Civile Part-66 Basic Knowledge
Examination – Module 14:
Propulsion Exam
,Direction Générale de l’Aviation Civile Part-66 Basic Knowledge Examination – Module 14: Propulsion Exam
Question 1
A handover identifies “Turbine Section” as confirmed and “thermal shock” as unresolved.
Which instruction preserves that distinction for the next person?
A. Replace the unresolved status with the expected outcome without recording further evidence.
B. Retain the confirmed result and continue the outstanding inquiry without treating it as completed.
C. Discard the confirmed result and infer that the unresolved matter has failed.
D. Mark both matters complete because they were included in the same handover.
Correct Answer: B
Full Explanation: The handover carries two different statuses. Keeping the confirmed result while
clearly identifying the open inquiry preserves continuity and prevents an assumption from being
recorded as a completed finding. Unknown and failed remain different states.
Question 2
A correction to “Boroscope Inspections” changes a result previously used to justify
“internal damage criteria”. The original decision is retained without checking the effect.
What is the principal weakness?
A. The retained decision may no longer be supported by the input on which it was based.
B. The correction proves every independent decision in the review must be discarded.
C. Keeping the original decision automatically confirms that the correction was unnecessary.
D. A corrected input can never affect any decision made from its earlier value.
Correct Answer: A
Full Explanation: The decision depended on an input that has changed. Its continuing support must
therefore be checked. The correction need not change the final decision, but retaining it without
reassessment leaves that question unresolved.
Question 3
A review of “Engine Mounts” must use the current, case-specific evidence on “vibration
dampening materials”. Which choice best follows that requirement?
A. Use an old summary with no link to the conditions of the present case.
B. Use the identified current observation from this case, after checking its conditions and relevance.
C. Use an unidentified earlier observation from another case because its conclusion is favorable.
D. Use a repeated opinion about the expected result without checking a case-specific observation.
Correct Answer: B
Full Explanation: The requirement specifies currency and case relevance. An identified observation
from the present case can be checked against those criteria. The alternatives lack either a reliable
connection to the current case or an observation that can be evaluated.
2863 Page 2
,Direction Générale de l’Aviation Civile Part-66 Basic Knowledge Examination – Module 14: Propulsion Exam
Question 4
A task concerning “Shut-off valves, pressurization, and dump valves” separates
identifying an issue from explaining its cause in “Fuel Distribution and Filtering:
heaters”. The issue is identified, but the explanation is untested. What has been
established?
A. The issue has been identified; its proposed cause remains to be evaluated.
B. Identifying the issue proves every proposed explanation of its cause.
C. An untested explanation means the identified issue could not have been observed.
D. Identification and explanation are interchangeable, so no further distinction is needed.
Correct Answer: A
Full Explanation: Identification establishes what issue is being considered. A causal explanation is an
additional claim requiring support. Keeping those steps separate prevents the observation of a problem
from being mistaken for proof of a particular cause.
Question 5
For this exercise, completion requires documented checks of both “Fuel pumps (gear,
centrifugal, plunger types)” and “centrifugal”. Which record meets the stated completion
rule?
A. The second check is recorded; completion of the first is inferred from a similar earlier case.
B. The first check is recorded; the second is described only as likely to be satisfactory.
C. Both checks appear in the plan, but neither outcome is recorded as having been checked.
D. Both checks are recorded, with their outcomes and the conditions under which they were made.
Correct Answer: D
Full Explanation: The rule requires evidence of both completed checks, not merely a plan,
expectation, or analogy. Recording the outcomes and their conditions meets that rule. Each alternative
leaves at least one required result unverified.
Question 6
A review of “Bellmouth inlets” requires evidence for two distinct aspects of “Inlet”: the
stated method and its observed result. Which submission is complete for this purpose?
A. An outcome claim with no description of how the relevant result was obtained.
B. Two descriptions of the intended method, both written before any result was observed.
C. A description of the method together with the observed result obtained by applying it.
D. A detailed description of the method with no record of any observed result.
Correct Answer: C
Full Explanation: The requirement has two parts: method and outcome evidence. Providing only one
part, even in detail or in duplicate, leaves the other unaddressed. A complete submission includes both
and connects the observed result to the method used.
2863 Page 3
, Direction Générale de l’Aviation Civile Part-66 Basic Knowledge Examination – Module 14: Propulsion Exam
Question 7
A case rule accepts evidence of either “Access ports” or “Boroscope Inspections:
tooling”, but requires “Access ports, tooling, internal damage criteria, and evaluation
procedures” in every case. Which evidence set is sufficient under that rule?
A. Only the separately mandatory requirement is confirmed; neither alternative has supporting
evidence.
B. One alternative is expected to be satisfactory, and the mandatory requirement remains
unexamined.
C. The first alternative is confirmed and the separately mandatory requirement is also confirmed.
D. Both alternatives are confirmed, but the separately mandatory requirement is still unknown.
Correct Answer: C
Full Explanation: The rule combines an alternative requirement with a separate mandatory one.
Confirming one alternative and the mandatory requirement satisfies both parts. Two alternatives cannot
compensate for missing mandatory evidence, and the mandatory result alone does not satisfy the
alternative requirement.
Question 8
A stated case rule makes satisfactory “diffusers” necessary, but not sufficient, for
accepting “variable inlet guide vanes”. The necessary condition is satisfied. What
follows?
A. Acceptance is impossible because a necessary condition has now been satisfied.
B. One required condition is met, but acceptance still depends on the remaining conditions.
C. Acceptance is established because every necessary condition is also sufficient on its own.
D. The rule becomes irrelevant once evidence of the necessary condition is available.
Correct Answer: B
Full Explanation: A necessary condition must be met, but meeting it does not establish every
requirement. The phrase 'not sufficient' explicitly rules out automatic acceptance. The remaining
conditions must therefore be evaluated before a final decision is made.
Question 9
An evaluation of “overheat sensing elements” reuses evidence about “Fire detection
loops” from another case. The relevant conditions have not been compared. What is the
necessary first question?
A. Whether the two cases have titles similar enough to avoid checking their differences.
B. Whether the other case reached the same conclusion the current reviewer prefers.
C. Whether copying the evidence into the current report changes its original conditions.
D. Whether the evidence's conditions and scope make it applicable to the present case.
Correct Answer: D
Full Explanation: Evidence from another case can be useful only if its applicability is established.
Similar titles, a favorable conclusion, or copying the record does not establish comparable conditions.
The scope and conditions must be checked before transfer.
2863 Page 4
Civile Part-66 Basic Knowledge
Examination – Module 14:
Propulsion Exam
,Direction Générale de l’Aviation Civile Part-66 Basic Knowledge Examination – Module 14: Propulsion Exam
Question 1
A handover identifies “Turbine Section” as confirmed and “thermal shock” as unresolved.
Which instruction preserves that distinction for the next person?
A. Replace the unresolved status with the expected outcome without recording further evidence.
B. Retain the confirmed result and continue the outstanding inquiry without treating it as completed.
C. Discard the confirmed result and infer that the unresolved matter has failed.
D. Mark both matters complete because they were included in the same handover.
Correct Answer: B
Full Explanation: The handover carries two different statuses. Keeping the confirmed result while
clearly identifying the open inquiry preserves continuity and prevents an assumption from being
recorded as a completed finding. Unknown and failed remain different states.
Question 2
A correction to “Boroscope Inspections” changes a result previously used to justify
“internal damage criteria”. The original decision is retained without checking the effect.
What is the principal weakness?
A. The retained decision may no longer be supported by the input on which it was based.
B. The correction proves every independent decision in the review must be discarded.
C. Keeping the original decision automatically confirms that the correction was unnecessary.
D. A corrected input can never affect any decision made from its earlier value.
Correct Answer: A
Full Explanation: The decision depended on an input that has changed. Its continuing support must
therefore be checked. The correction need not change the final decision, but retaining it without
reassessment leaves that question unresolved.
Question 3
A review of “Engine Mounts” must use the current, case-specific evidence on “vibration
dampening materials”. Which choice best follows that requirement?
A. Use an old summary with no link to the conditions of the present case.
B. Use the identified current observation from this case, after checking its conditions and relevance.
C. Use an unidentified earlier observation from another case because its conclusion is favorable.
D. Use a repeated opinion about the expected result without checking a case-specific observation.
Correct Answer: B
Full Explanation: The requirement specifies currency and case relevance. An identified observation
from the present case can be checked against those criteria. The alternatives lack either a reliable
connection to the current case or an observation that can be evaluated.
2863 Page 2
,Direction Générale de l’Aviation Civile Part-66 Basic Knowledge Examination – Module 14: Propulsion Exam
Question 4
A task concerning “Shut-off valves, pressurization, and dump valves” separates
identifying an issue from explaining its cause in “Fuel Distribution and Filtering:
heaters”. The issue is identified, but the explanation is untested. What has been
established?
A. The issue has been identified; its proposed cause remains to be evaluated.
B. Identifying the issue proves every proposed explanation of its cause.
C. An untested explanation means the identified issue could not have been observed.
D. Identification and explanation are interchangeable, so no further distinction is needed.
Correct Answer: A
Full Explanation: Identification establishes what issue is being considered. A causal explanation is an
additional claim requiring support. Keeping those steps separate prevents the observation of a problem
from being mistaken for proof of a particular cause.
Question 5
For this exercise, completion requires documented checks of both “Fuel pumps (gear,
centrifugal, plunger types)” and “centrifugal”. Which record meets the stated completion
rule?
A. The second check is recorded; completion of the first is inferred from a similar earlier case.
B. The first check is recorded; the second is described only as likely to be satisfactory.
C. Both checks appear in the plan, but neither outcome is recorded as having been checked.
D. Both checks are recorded, with their outcomes and the conditions under which they were made.
Correct Answer: D
Full Explanation: The rule requires evidence of both completed checks, not merely a plan,
expectation, or analogy. Recording the outcomes and their conditions meets that rule. Each alternative
leaves at least one required result unverified.
Question 6
A review of “Bellmouth inlets” requires evidence for two distinct aspects of “Inlet”: the
stated method and its observed result. Which submission is complete for this purpose?
A. An outcome claim with no description of how the relevant result was obtained.
B. Two descriptions of the intended method, both written before any result was observed.
C. A description of the method together with the observed result obtained by applying it.
D. A detailed description of the method with no record of any observed result.
Correct Answer: C
Full Explanation: The requirement has two parts: method and outcome evidence. Providing only one
part, even in detail or in duplicate, leaves the other unaddressed. A complete submission includes both
and connects the observed result to the method used.
2863 Page 3
, Direction Générale de l’Aviation Civile Part-66 Basic Knowledge Examination – Module 14: Propulsion Exam
Question 7
A case rule accepts evidence of either “Access ports” or “Boroscope Inspections:
tooling”, but requires “Access ports, tooling, internal damage criteria, and evaluation
procedures” in every case. Which evidence set is sufficient under that rule?
A. Only the separately mandatory requirement is confirmed; neither alternative has supporting
evidence.
B. One alternative is expected to be satisfactory, and the mandatory requirement remains
unexamined.
C. The first alternative is confirmed and the separately mandatory requirement is also confirmed.
D. Both alternatives are confirmed, but the separately mandatory requirement is still unknown.
Correct Answer: C
Full Explanation: The rule combines an alternative requirement with a separate mandatory one.
Confirming one alternative and the mandatory requirement satisfies both parts. Two alternatives cannot
compensate for missing mandatory evidence, and the mandatory result alone does not satisfy the
alternative requirement.
Question 8
A stated case rule makes satisfactory “diffusers” necessary, but not sufficient, for
accepting “variable inlet guide vanes”. The necessary condition is satisfied. What
follows?
A. Acceptance is impossible because a necessary condition has now been satisfied.
B. One required condition is met, but acceptance still depends on the remaining conditions.
C. Acceptance is established because every necessary condition is also sufficient on its own.
D. The rule becomes irrelevant once evidence of the necessary condition is available.
Correct Answer: B
Full Explanation: A necessary condition must be met, but meeting it does not establish every
requirement. The phrase 'not sufficient' explicitly rules out automatic acceptance. The remaining
conditions must therefore be evaluated before a final decision is made.
Question 9
An evaluation of “overheat sensing elements” reuses evidence about “Fire detection
loops” from another case. The relevant conditions have not been compared. What is the
necessary first question?
A. Whether the two cases have titles similar enough to avoid checking their differences.
B. Whether the other case reached the same conclusion the current reviewer prefers.
C. Whether copying the evidence into the current report changes its original conditions.
D. Whether the evidence's conditions and scope make it applicable to the present case.
Correct Answer: D
Full Explanation: Evidence from another case can be useful only if its applicability is established.
Similar titles, a favorable conclusion, or copying the record does not establish comparable conditions.
The scope and conditions must be checked before transfer.
2863 Page 4
