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FAA Aviation Mechanic Airframe (AMA) practice questions

300 free questions with answers and explanations.

Practice test
  1. 251.An aircraft's annual inspection has expired, and the owner needs to fly it to a maintenance facility for repairs before it can be returned to airworthy condition. What must be accomplished before the FAA will issue a special flight permit (ferry permit) for this flight?Airframe Inspection
  2. 252.A pilot selects the landing gear handle to the DOWN position, but the nose gear position indicator shows a red light with no green light illuminated. What does this indicate?Landing Gear Systems
  3. 253.During a 100-hour inspection, a technician checks the fuel tank sump quick-drain valves on a light aircraft. What is the primary purpose of these valves?Fuel, Cabin and Ice Control Systems
  4. 254.A starter motor on a reciprocating engine uses a series-wound DC motor design rather than a shunt-wound motor. A technician explains this choice to a trainee. What operating characteristic makes the series motor best suited for this application?Airframe Electrical and Instruments
  5. 255.An aircraft's normal hydraulic brake system has failed completely. The pilot pulls an emergency brake handle, which releases compressed nitrogen from a storage bottle through a metering/relief valve directly to the brake pistons, bypassing the hydraulic power system. This describes aLanding Gear Systems
  6. 256.A fixed-displacement engine-driven hydraulic pump delivers 6 gallons per minute of fluid while being driven at 4,800 rpm. Approximately what is the pump's displacement per revolution, in cubic inches? (1 gallon = 231 cubic inches)Hydraulic and Pneumatic Systems
  7. 257.A technician is selecting wire gauge for a new 28-volt DC circuit that will carry 15 amps continuously through a 40-foot wire run from the bus to the equipment. Which factor, in addition to current-carrying capacity, must be considered to properly size this wire according to standard aircraft wiring practices?Airframe Electrical and Instruments
  8. 258.A technician suspects a fatigue crack on the surface of an aluminum wing skin but sees no visible crack. Which nondestructive inspection method is best suited to detect this surface crack on nonferrous, non-magnetic material?Airframe Inspection
  9. 259.A technician is inspecting an aileron trim system and finds a small auxiliary surface hinged to the trailing edge of the aileron that is mechanically linked to the fixed wing structure so that it automatically deflects opposite to the aileron's movement, reducing pilot control force without being directly controlled by the pilot. What is this type of tab called?Airframe Structures
  10. 260.A technician installs a bonding jumper between a control surface and the adjacent airframe structure. What is the primary purpose of this bonding jumper?Airframe Electrical and Instruments
  11. 261.A hydraulic circuit uses a four-way selector valve to control a double-acting landing gear actuator. When the valve is positioned for gear retraction, what must it simultaneously accomplish?Hydraulic and Pneumatic Systems
  12. 262.A technician is calculating the bearing stress on a rivet-to-sheet joint where a 900-pound load is applied. The rivet diameter is 0.1875 inch and the sheet thickness is 0.032 inch. What is the bearing stress at the joint?Airframe Structures
  13. 263.An airline's maintenance program divides each aircraft into numbered geographic areas, and technicians inspect all systems, structures, and components within each area using a dedicated checklist during scheduled maintenance visits. What is this type of inspection program called?Airframe Inspection
  14. 264.A technician needs to install a removable inspection panel that mechanics will open frequently during routine maintenance using only a screwdriver, without the panel requiring separate nuts. Which fastener is best suited for this application?Airframe Structures
  15. 265.A technician finds that an aircraft's records show an Airworthiness Directive (AD) was complied with 500 hours ago, but the AD requires recurring compliance every 400 hours. What is the technician's responsibility regarding this discrepancy?Airframe Inspection
  16. 266.A technician is performing a compass swing on a compass rose. The aircraft is aligned on a magnetic heading of 000° (north) and the N-S compensator screw is adjusted to minimize deviation. On which heading should the technician next align the aircraft to adjust the E-W compensator screw?Airframe Electrical and Instruments
  17. 267.A technician is preparing to install standard flush (countersunk head) rivets in an aircraft skin panel. What countersink head angle is standard for these flush rivets?Airframe Structures
  18. 268.A laboratory analysis of a hydraulic fluid sample reveals a high count of particles in the 5 to 15 micron range along with trace amounts of ferrous metal particles. This level of contamination is most significant to a technician because it can lead to:Hydraulic and Pneumatic Systems
  19. 269.A technician inspecting a 7x19 control cable near a pulley finds several broken wires. According to general cable inspection criteria in AC 43.13-1B, what is the primary factor used to determine if the cable must be rejected due to broken wires?Airframe Inspection
  20. 270.A technician is explaining the internal operation of a vertical speed indicator (VSI) to an apprentice. Inside the instrument case, a diaphragm is connected directly to the static line, while the case itself is connected to the static line through a calibrated restricted orifice (calibrated leak). What does this arrangement allow the VSI to measure?Airframe Electrical and Instruments
  21. 271.A technician is recovering a fabric-covered aircraft using a synthetic fabric covering process approved under a supplemental type certificate. Which practice is required to remain in compliance during this process?Airframe Structures
  22. 272.During a functional check, the hydraulic system that normally extends the landing gear has failed completely. The pilot uses an alternate method that releases the uplocks and allows the gear to fall by gravity and airflow. This system is calledLanding Gear Systems
  23. 273.A pilot flying a compass heading of due north in the Northern Hemisphere begins a turn to the east. Due to magnetic dip, how will the magnetic compass initially indicate the turn?Airframe Electrical and Instruments
  24. 274.A technician crimps a new terminal lug onto a wire and inspects the connection before installation. Which inspection finding would require the technician to reject the crimped terminal and remake the connection?Airframe Electrical and Instruments
  25. 275.An owner has a non-structural cargo door installed as a major alteration on a Cessna 182 using approved data. Before the aircraft is returned to service, which inspection must be performed to verify the alteration matches the approved data exactly?Airframe Inspection
  26. 276.A technician troubleshoots a capacitance-type fuel quantity indicating system that reads incorrectly after the aircraft was refueled with a batch of fuel of unusually different density. What is the underlying operating principle that explains this sensitivity to fuel density?Fuel, Cabin and Ice Control Systems
  27. 277.During an inspection of a fuel tank access panel on a transport category aircraft, a technician notices the sealant around the panel has cracked and lifted. Why is this discrepancy considered a significant airworthiness concern requiring prompt correction?Airframe Inspection
  28. 278.A technician is safety-wiring a turnbuckle on a flight control cable assembly using two separate lengths of wire, with each wire independently wrapped a minimum of three turns around the barrel and through its adjacent cable eye. Which turnbuckle safetying method is being used?Airframe Structures
  29. 279.A hydraulic system relief valve begins to crack open (initial opening) at 3,000 psi and does not reach full flow (fully open) until system pressure reaches 3,250 psi. What is the percentage differential between the crack pressure and the full-flow pressure of this relief valve?Hydraulic and Pneumatic Systems
  30. 280.A technician is inspecting the pressurization system of a transport-category aircraft and locates a valve that is separate from the primary cabin pressure outflow valve. This valve opens automatically only if cabin differential pressure exceeds a preset maximum limit, protecting the fuselage from structural damage. This valve is the:Fuel, Cabin and Ice Control Systems
  31. 281.A technician is comparing two hydraulic reservoir pressurization designs used to ensure a positive fluid supply to the engine-driven pump inlet. One design uses regulated engine bleed air ducted directly into the reservoir air space above the fluid. The other uses a small internal piston, actuated by system return pressure, to pressurize the fluid. The first design (using regulated bleed air directly) is known as a(n):Hydraulic and Pneumatic Systems
  32. 282.During refueling of a transport-category aircraft at a high flow rate, a technician notes that Jet A fuel contains a static dissipater additive (SDA). What is the primary purpose of this additive?Fuel, Cabin and Ice Control Systems
  33. 283.A technician needs to determine the resistance of a resistive heating element in a 24-volt DC windshield anti-ice circuit. An ammeter in series with the element reads 8 amps when full system voltage is applied. What is the resistance of the element?Airframe Electrical and Instruments
  34. 284.A technician is preparing to install rivets in a thin 0.020-inch aluminum skin where a flush surface is required, but the skin is too thin to safely countersink. What process should be used instead?Airframe Structures
  35. 285.A pneumatic emergency landing gear extension system uses a compressed air storage bottle with a volume of 250 cubic inches charged to 3,000 psi. When discharged, this air fills the gear actuating system lines and cylinders, which have a total volume of 750 cubic inches. Assuming no temperature change, what is the resulting pressure in the system after discharge?Hydraulic and Pneumatic Systems
  36. 286.During troubleshooting, a technician finds that an aircraft's attitude indicator has become sluggish and tumbles shortly after engine start. A test of the vacuum system shows suction below the minimum specification. This finding is most consistent with a fault in which type of instrument system?Airframe Electrical and Instruments
  37. 287.A technician is bleeding air from a hydraulic system after component replacement. Air trapped in the system can cause which of the following operational problems?Hydraulic and Pneumatic Systems
  38. 288.A technician is solution heat treating a 2024-T3 aluminum repair skin in preparation for forming. After removing the part from the furnace at the specified soaking temperature, what is the maximum allowable delay before the part must be quenched to retain proper corrosion resistance and mechanical properties?Airframe Structures
  39. 289.A technician is inspecting a hydraulic reservoir equipped with a standpipe extending up from the bottom. The normal system pump draws fluid through the standpipe, while the emergency system pump draws fluid directly from the very bottom of the reservoir, below the standpipe opening. What is the purpose of this arrangement?Hydraulic and Pneumatic Systems
  40. 290.A pilot asks a technician why the aircraft's pitot-static system and altimeter were tested even though there had been no reported malfunctions. Under 14 CFR 91.411, this test is required at what interval for aircraft operated under IFR?Airframe Inspection
  41. 291.A technician is reviewing maintenance records to verify compliance with a life-limited component's replacement time on a turbine-powered airplane. Which record-keeping practice is essential to accurately track this component's status?Airframe Inspection
  42. 292.A technician has installed a new wire bundle for a flight control system and must verify there is no short or degraded insulation between the conductors and the airframe before applying power. Which test instrument is designed for this insulation resistance check?Airframe Electrical and Instruments
  43. 293.During landing gear retraction on a hydraulic-actuated system, a technician notes that the gear doors must fully open before the main gear strut begins retracting. Which component ensures this timing?Landing Gear Systems
  44. 294.A technician is installing a steel bracket directly against an aluminum wing skin. To prevent galvanic corrosion at the interface, what should the technician do before assembly?Airframe Structures
  45. 295.A technician explains to an apprentice why manufacturer fueling instructions specify filling an integral wing fuel tank to only 98 percent of its rated volume rather than completely full. What is the primary reason for leaving this unfilled space, known as ullage?Fuel, Cabin and Ice Control Systems
  46. 296.A technician is examining a wing box beam spar assembly. Which structural member is designed primarily to resist the tension and compression bending loads at the top and bottom of the spar?Airframe Structures
  47. 297.A technician is forming a 90-degree bend in a piece of 2024-T3 aluminum sheet using a hand brake. To reduce the risk of cracking along the bend, the bend line should be oriented relative to the sheet's grain direction how?Airframe Structures
  48. 298.A technician is troubleshooting a fuel vent system on a transport-category aircraft wing and locates a small chamber near the wingtip that is not part of the usable fuel volume. Its purpose is to collect fuel that expands due to thermal changes or sloshes during maneuvers, preventing fuel from escaping through the vent outlet. This chamber is called the:Fuel, Cabin and Ice Control Systems
  49. 299.A mechanic holding an Inspection Authorization (IA) wants to know the scope of privileges this certificate grants beyond a standard A&P certificate. Which of the following is a privilege granted specifically by an IA?Airframe Inspection
  50. 300.An engine-driven hydraulic pump on a transport category aircraft requires a positive fluid supply at its inlet during high-altitude, low-pressure conditions to prevent cavitation. Which reservoir design uses system fluid pressure acting on an internal piston to keep the reservoir fluid pressurized?Hydraulic and Pneumatic Systems