Free Aviation Maintenance Technician Airframe Practice Questions

Sample Practice Questions

Try these 10 sample questions from the Aviation Maintenance Technician Airframe practice bank. Each includes the answer and explanation. Continue with the interactive practice above to review the full question set.

1. 1A mechanic is replacing rivets in an aircraft skin area that must retain a smooth aerodynamic surface. Which head style should be selected?

   1. A. Universal head
   2. B. Round head
   3. C. Countersunk head
   4. D. Brazier head

   Answer: C

   Explanation: The FAA states, "Countersunk head rivets should be used where a smooth aerodynamic surface is required." A countersunk head meets the surface requirement in this repair.

   Reference: Aviation Maintenance Technician Handbook—Airframe (FAA-H-8083-31B) — Chapter 4, p. 4-31, Solid Shank Rivet

2. 2A replacement primary control cable is specified to contain seven strands, each containing nineteen wires. Which cable designation matches this construction?

   1. A. 1 × 7
   2. B. 7 × 7
   3. C. 1 × 19
   4. D. 7 × 19

   Answer: D

   Explanation: The FAA states, "The 7 × 19 cable is made up of seven strands of 19 wires each." The first number identifies strands and the second identifies wires per strand.

   Reference: Aviation Maintenance Technician Handbook—Airframe (FAA-H-8083-31B) — Chapter 2, p. 2-39, Cable designations

3. 3A standard-category, single-engine piston airplane is maintained under the ordinary annual-inspection provisions of 14 CFR 91.409(a), with no applicable exception or alternative program. Within what preceding interval must its qualifying inspection have occurred?

   1. A. 6 calendar months
   2. B. 12 calendar months
   3. C. 24 calendar months
   4. D. 36 calendar months

   Answer: B

   Explanation: Section 91.409(a) requires a qualifying inspection "within the preceding 12 calendar months". The stated airplane is subject to that paragraph rather than an excepted inspection program.

   Reference: eCFR — 14 CFR 91.409: Inspections — 14 CFR 91.409(a), introductory sentence

4. 4A mechanic compares hydraulic liquids by their internal resistance to flow. Which property is being compared?

   1. A. Density
   2. B. Viscosity
   3. C. Chemical stability
   4. D. Compressibility

   Answer: B

   Explanation: The FAA defines "Viscosity is internal resistance to flow." It describes how readily the hydraulic liquid flows.

   Reference: Aviation Maintenance Technician Handbook—Airframe (FAA-H-8083-31B) — Chapter 12, p. 12-1, Viscosity

5. 5During a functional check, the cabin pressure controller commands the device that normally regulates cabin air discharge. Which device should the mechanic observe?

   1. A. Pressure reducing valve
   2. B. Cabin outflow valve
   3. C. Negative pressure relief valve
   4. D. Bleed air check valve

   Answer: B

   Explanation: The handbook states, "Controlling cabin pressurization is accomplished through regulating the amount of air that flows out of the cabin." The outflow valve modulates that discharge to maintain the selected cabin pressure.

   Reference: Aviation Maintenance Technician Handbook—Airframe (FAA-H-8083-31B) — Chapter 16, p. 16-30, Cabin Air Pressure Regulator & Outflow Valve

6. 6A mechanic examines the carrier output of an aircraft VHF voice transmitter. Which modulation method does the handbook identify for this communication service?

   1. A. Frequency modulation
   2. B. Pulse-position modulation
   3. C. Amplitude modulation
   4. D. Phase modulation

   Answer: C

   Explanation: The amplitude modulation discussion states, "It is used in aircraft VHF communication radios." In AM, information varies carrier amplitude while carrier frequency remains consistent.

   Reference: Aviation Maintenance Technician Handbook—Airframe (FAA-H-8083-31B) — Chapter 11, p. 11-31, Amplitude Modulation (AM)

7. 7A reciprocating aircraft develops fuel-flow interruption when hot fuel is drawn through a low-pressure supply line. What condition does premature vaporization in that line produce?

   1. A. Vapor lock
   2. B. Carburetor icing
   3. C. Fuel cavitation erosion
   4. D. Surface ignition

   Answer: A

   Explanation: The handbook defines the condition: "Vapor lock is a condition in which AVGAS vaporizes in the fuel line or other components between the fuel tank and the carburetor." Premature vapor formation interrupts liquid delivery.

   Reference: Aviation Maintenance Technician Handbook—Airframe (FAA-H-8083-31B) — Chapter 14, p. 14-3, Vapor Lock

8. 8A mechanic distinguishes two ice-protection functions during system training. Which function is designed to prevent ice formation before accumulation begins?

   1. A. Deicing
   2. B. Defrosting
   3. C. Defogging
   4. D. Anti-icing

   Answer: D

   Explanation: The handbook states, "Anti-icing equipment is turned on before entering icing conditions and is designed to prevent ice from forming." Deicing instead removes ice after accumulation begins.

   Reference: Aviation Maintenance Technician Handbook—Airframe (FAA-H-8083-31B) — Chapter 15, p. 15-3, Ice Prevention

9. 9Burning magnesium is identified during an aircraft ground fire. Which fire class applies to this combustible metal?

   1. A. Class A
   2. B. Class B
   3. C. Class C
   4. D. Class D

   Answer: D

   Explanation: The handbook identifies "Class D—fires involving combustible metals, such as magnesium". This is distinct from ordinary combustibles, flammable liquids, or energized electrical equipment.

   Reference: Aviation Maintenance Technician Handbook—Airframe (FAA-H-8083-31B) — Chapter 17, p. 17-1, Classes of Fires, item 4

10. 10A mechanic checks the normal flushing flow in a closed, recirculating aircraft lavatory system. What liquid should that system circulate?

    1. A. Fresh potable water without disinfectant
    2. B. Filtered waste water containing disinfectant
    3. C. Unfiltered waste water containing disinfectant
    4. D. Fresh potable water containing disinfectant

    Answer: B

    Explanation: FAA guidance describes "a closed system using filtered waste water containing disinfectant". An open system instead uses potable rinse water.

    Reference: AC 25.1455-1 — Waste Water/Potable Water Drain System Certification Testing — Page 1, paragraph 3a, Background