Florida Airframe & Powerplant
Mechanic Exam Questions and Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
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1. What is the primary function of an aircraft alternator?
A. Produce AC electrical power
B. Store electrical power
C. Regulate fuel pressure
D. Provide vacuum pressure
Answer: A
Rationale: Alternators generate alternating current that is converted and
distributed as required.
2. A mechanic torques a bolt beyond specification. What risk is created?
A. Improved fatigue resistance
B. Reduced clamp load only
C. Bolt stretching or failure
D. Increased corrosion resistance
Answer: C
Rationale: Excessive torque can permanently stretch or weaken fasteners.
3. Which fuel contamination is most commonly checked during preflight and
maintenance inspections?
,A. Sand
B. Water
C. Paint chips
D. Grease
Answer: B
Rationale: Water contamination is common and poses significant operational
hazards.
4. What is the purpose of a differential compression test?
A. Measure fuel pressure
B. Evaluate cylinder sealing ability
C. Determine oil viscosity
D. Check magneto timing
Answer: B
Rationale: Differential compression testing assesses cylinder and valve condition.
5. During sheet-metal repair, which rivet type is commonly used when only one
side is accessible?
A. Solid rivet
B. Flush rivet
C. Blind rivet
D. Universal rivet
Answer: C
Rationale: Blind rivets are designed for installations with limited access.
6. What effect does detonation have on an aircraft engine?
A. Lowers cylinder temperatures
B. Causes abnormal combustion pressures
C. Improves fuel economy
D. Reduces spark plug wear
Answer: B
Rationale: Detonation creates damaging pressure spikes and excessive heat.
, 7. Which aircraft control surface controls roll?
A. Rudder
B. Elevator
C. Trim tab
D. Aileron
Answer: D
Rationale: Ailerons control movement about the longitudinal axis.
8. A mechanic discovers chafing on an electrical wire bundle. The proper action
is to:
A. Paint over the damaged area
B. Inspect and repair or replace affected wiring
C. Ignore minor wear
D. Increase circuit breaker size
Answer: B
Rationale: Chafed wiring can create shorts, arcing, and fire hazards.
9. What is the primary purpose of engine baffling?
A. Improve exhaust flow
B. Direct cooling air around cylinders
C. Increase fuel pressure
D. Reduce ignition voltage
Answer: B
Rationale: Proper baffling ensures effective engine cooling.
10. Which metal is commonly used in aircraft structural skins because of its high
strength-to-weight ratio?
A. Lead
B. Copper
C. Aluminum alloy
D. Cast iron
Answer: C
Mechanic Exam Questions and Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary function of an aircraft alternator?
A. Produce AC electrical power
B. Store electrical power
C. Regulate fuel pressure
D. Provide vacuum pressure
Answer: A
Rationale: Alternators generate alternating current that is converted and
distributed as required.
2. A mechanic torques a bolt beyond specification. What risk is created?
A. Improved fatigue resistance
B. Reduced clamp load only
C. Bolt stretching or failure
D. Increased corrosion resistance
Answer: C
Rationale: Excessive torque can permanently stretch or weaken fasteners.
3. Which fuel contamination is most commonly checked during preflight and
maintenance inspections?
,A. Sand
B. Water
C. Paint chips
D. Grease
Answer: B
Rationale: Water contamination is common and poses significant operational
hazards.
4. What is the purpose of a differential compression test?
A. Measure fuel pressure
B. Evaluate cylinder sealing ability
C. Determine oil viscosity
D. Check magneto timing
Answer: B
Rationale: Differential compression testing assesses cylinder and valve condition.
5. During sheet-metal repair, which rivet type is commonly used when only one
side is accessible?
A. Solid rivet
B. Flush rivet
C. Blind rivet
D. Universal rivet
Answer: C
Rationale: Blind rivets are designed for installations with limited access.
6. What effect does detonation have on an aircraft engine?
A. Lowers cylinder temperatures
B. Causes abnormal combustion pressures
C. Improves fuel economy
D. Reduces spark plug wear
Answer: B
Rationale: Detonation creates damaging pressure spikes and excessive heat.
, 7. Which aircraft control surface controls roll?
A. Rudder
B. Elevator
C. Trim tab
D. Aileron
Answer: D
Rationale: Ailerons control movement about the longitudinal axis.
8. A mechanic discovers chafing on an electrical wire bundle. The proper action
is to:
A. Paint over the damaged area
B. Inspect and repair or replace affected wiring
C. Ignore minor wear
D. Increase circuit breaker size
Answer: B
Rationale: Chafed wiring can create shorts, arcing, and fire hazards.
9. What is the primary purpose of engine baffling?
A. Improve exhaust flow
B. Direct cooling air around cylinders
C. Increase fuel pressure
D. Reduce ignition voltage
Answer: B
Rationale: Proper baffling ensures effective engine cooling.
10. Which metal is commonly used in aircraft structural skins because of its high
strength-to-weight ratio?
A. Lead
B. Copper
C. Aluminum alloy
D. Cast iron
Answer: C
