Licensure Practice Exam Questions And

Airframe And Powerplant Mechanic (A&P) Licensure Practice Exam Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

(All subjects: General, Airframe, and Powerplant)

• What is the purpose of a torque wrench?
• To measure electrical resistance
• To apply a specific amount of tightening force to a fastener
• To measure hydraulic pressure
• To check alignment

Rationale: Proper torque ensures fasteners are neither under- nor over-

tightened, preventing mechanical failure.

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• Which type of current is produced by an aircraft alternator?
• Direct current
• Alternating current
• Pulsating current
• Rectified current

Rationale: Alternators generate AC, which is converted to DC for aircraft

systems via rectifiers.

• What is the function of the carburetor?
• To cool the engine oil
• To control ignition timing
• To mix fuel and air in proper proportions
• To provide lubrication

Rationale: A carburetor ensures correct air-fuel ratio for efficient

combustion.

• Bernoulli’s Principle explains which phenomenon?
• Heat transfer
• Fuel atomization
• Lift produced by a wing
• Compression ratio

Rationale: Increased airflow velocity decreases pressure, generating lift. 2 / 4

• What material is commonly used for aircraft control cables?
• Aluminum
• Stainless steel
• Titanium
• Bronze

Rationale: Stainless steel provides strength, flexibility, and corrosion

resistance.

6. The angle of attack is defined as the angle between the:

• Chord line and the longitudinal axis
• Relative wind and the horizontal plane
• Chord line and relative wind
• Mean camber line and ground

Rationale: Angle of attack determines lift and stall characteristics.

• Which instrument indicates the rate of climb or descent?
• Airspeed indicator
• Vertical speed indicator
• Altimeter
• Turn coordinator

Rationale: The VSI measures rate of change in static pressure. 3 / 4

• What is the purpose of a magneto in an aircraft engine?
• To regulate fuel pressure
• To generate electrical spark independent of the battery
• To control oil temperature
• To time the ignition system

Rationale: A magneto provides engine ignition even if electrical power fails.

• A fuselage constructed with frames, longerons, and stringers covered

with stressed skin is called:

• Truss type
• Semi-monocoque
• Monocoque
• Composite

Rationale: Semi-monocoque combines internal framework with load-bearing

skin.

• Which gas is used in most aircraft shock struts?
• Oxygen
• Carbon dioxide
• Compressed air
• Nitrogen
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