Step2Study

FAA Aviation Mechanic Airframe (AMA) practice questions

300 free questions with answers and explanations.

Practice test
  1. 101.A hydraulic filter's differential pressure indicator pops during ground operation, alerting the technician that the filter element is becoming clogged. Despite this, the pilot reports no interruption of hydraulic system operation during the flight. Which design feature explains why system flow was maintained?Hydraulic and Pneumatic Systems
  2. 102.A technician is servicing an oleo pneumatic shock strut and must add gas to the strut's air chamber. Which gas is specified by most manufacturers for this purpose, and why?Landing Gear Systems
  3. 103.A line technician refuels an aircraft with 800 gallons of Jet A fuel. Using a standard density of 6.7 pounds per gallon, what is the total weight of fuel added?Fuel, Cabin and Ice Control Systems
  4. 104.A technician is inspecting a nose landing gear switch that signals the aircraft's weight is on the wheels. This switch is most commonly known as theLanding Gear Systems
  5. 105.A technician conducting a walk-around inspection notices that the static dischargers (static wicks) are missing from the trailing edges of the ailerons and rudder. What is the primary operational hazard created by this discrepancy?Airframe Structures
  6. 106.A technician is servicing an oleo pneumatic shock strut that is low on both hydraulic fluid and air pressure. What is the correct servicing procedure?Landing Gear Systems
  7. 107.During a corrosion inspection of a heat-treated aluminum wing spar, a technician notices a form of corrosion that progresses along the grain boundaries of the metal, often invisible from the surface until it causes exfoliation. What type of corrosion is this?Airframe Inspection
  8. 108.A technician must determine if a single 3/16-inch diameter 2117-T4 (AD) solid rivet can safely carry a 750-pound single-shear load. The allowable shear stress for AD rivets is 30,000 psi. Using the shear area formula A = (π/4)d², what is the calculated allowable shear load, and is the rivet adequate?Airframe Structures
  9. 109.An engine-driven hydraulic pump on a light twin begins producing a loud whining/growling noise and erratic pressure fluctuations shortly after the reservoir fluid level was found to be low. A borescope inspection later reveals pitting and erosion on the internal pump gears. What condition most likely caused this damage?Hydraulic and Pneumatic Systems
  10. 110.A technician inspects the internal baffles of a wing fuel tank on a transport-category aircraft and finds one-way flapper check valves installed within the baffle openings. What is the primary function of these check valves?Fuel, Cabin and Ice Control Systems
  11. 111.A technician examining a wing structure finds a heavily reinforced rib located at a landing gear attachment point that, in addition to supporting airfoil shape, transmits concentrated point loads and resists compressive loads from drag/anti-drag wire bracing. This rib is best classified as which type?Airframe Structures
  12. 112.A technician is explaining to a trainee why hydraulic fluid, rather than compressed air, is preferred for actuating primary flight controls that require precise and immediate response to pilot input. Which property of hydraulic fluid makes this possible?Hydraulic and Pneumatic Systems
  13. 113.A 24-volt nickel-cadmium battery is rated at 30 ampere-hours. If a continuous electrical load of 5 amps is applied after the aircraft's generator fails, approximately how long can the battery be expected to supply this load before full discharge?Airframe Electrical and Instruments
  14. 114.A technician inspecting a 2024-T3 aluminum wing skin notices a very thin layer of pure (unalloyed) aluminum bonded to the outer surface of the sheet. What is the primary purpose of this cladding layer?Airframe Structures
  15. 115.A technician needs to supply 26-volt AC power to instrument panel lighting from a 115-volt, 400 Hz AC bus. Instead of using a two-winding isolation transformer, the technician selects an autotransformer with a single tapped winding. What is a key characteristic the technician must consider when using this device?Airframe Electrical and Instruments
  16. 116.A technician is inspecting a main landing gear configuration on a business jet in which the wheel and axle assembly is positioned aft of and below the strut pivot, connected by a rigid arm that pivots as the strut compresses. What type of landing gear arrangement is this?Landing Gear Systems
  17. 117.A technician is selecting a protruding-head solid rivet for a general repair on an aluminum skin where head style is not critical. The rivet has a smooth, dome-shaped head that is flatter than the old round-head style. Which AN rivet designation describes this head style?Airframe Structures
  18. 118.An operator wants to use a progressive inspection program instead of the standard annual/100-hour inspection schedule for a fleet aircraft. Which statement about progressive inspections under 14 CFR 91.409(d) is correct?Airframe Inspection
  19. 119.A technician is comparing two engine-driven hydraulic pump designs. One pump delivers a constant volume of fluid per revolution regardless of system demand, requiring a separate downstream device to control system pressure. Which pump type is being described?Hydraulic and Pneumatic Systems
  20. 120.A technician finds surface corrosion on a magnesium alloy landing gear housing. Which corrosion treatment is specifically appropriate for magnesium alloys, as opposed to the chromate conversion coatings typically used on aluminum?Airframe Structures
  21. 121.A technician is servicing an air/oil (oleo pneumatic) shock strut and must determine the correct amount of strut extension for the current conditions. Because the volume of compressed gas in the strut changes with temperature, the manufacturer provides a servicing chart that correlates ambient temperature to theLanding Gear Systems
  22. 122.A pilot activates the windshield rain repellent system during a heavy rain shower on approach. How does this system improve forward visibility?Fuel, Cabin and Ice Control Systems
  23. 123.After rigging the ailerons on a light airplane, a technician checks control surface travel using a protractor against the manufacturer's specified up and down travel limits. Why is verifying these exact travel limits critical, beyond simply achieving smooth control feel?Airframe Inspection
  24. 124.A technician is troubleshooting a vibrating rod-type ice detector on a turbine aircraft that is giving false ice indications. What operating principle explains how this sensor normally detects ice accumulation?Fuel, Cabin and Ice Control Systems
  25. 125.A technician is scheduling a 100-hour inspection on a Cessna 172 used for flight instruction. Which statement about the scope of this inspection is correct?Airframe Inspection
  26. 126.A technician is inspecting a hydraulic parking brake system that uses a component to store pressurized fluid so the parking brakes remain applied even after the aircraft's engine-driven hydraulic pump is shut down. Which component performs this function?Landing Gear Systems
  27. 127.A technician inspecting a wing skin panel notices a small, sharp-cornered rectangular access hole cut into the structure without any reinforcement or radius at the corners. Why is this a structural concern?Airframe Structures
  28. 128.A technician is preparing bare aluminum structural parts for painting and applies a yellow-green coating before the topcoat. What is the primary purpose of this zinc chromate primer coat?Airframe Structures
  29. 129.A technician comparing two main landing gear tire constructions notes that one has plies running diagonally at alternating angles across the carcass, while the other has plies running straight across from bead to bead with stabilizer belts under the tread. What is the diagonal-ply construction called?Landing Gear Systems
  30. 130.A technician performing a composite skin repair per the structural repair manual must taper (scarf) the damaged area at a 30:1 ratio before applying the repair plies. If the skin laminate thickness is 0.060 inch, what is the required scarf length?Airframe Structures
  31. 131.A technician needs to inspect an assembled wing structure for internal corrosion and hidden cracks without disassembly. The chosen method must be able to penetrate through multiple layers of material and produce a shadow image on film for interpretation. Which nondestructive inspection method should be used?Airframe Structures
  32. 132.An outside air temperature (OAT) gauge is installed with a probe extending through the aircraft skin into the airstream. The gauge requires no electrical power source to operate. Which physical principle allows this gauge to indicate temperature?Airframe Electrical and Instruments
  33. 133.A technician is forming a 90-degree bend in a piece of 0.040-inch thick aluminum sheet using a bend radius of 0.125 inch. What is the setback dimension for this bend?Airframe Structures
  34. 134.A composite structures technician is laying up a repair patch that must resist loads from multiple directions equally. Which ply orientation scheme should the technician use?Airframe Structures
  35. 135.A technician is checking the strength of an in-service fabric-covered airplane wing using a calibrated field test instrument pressed against the surface. What is this common field test called, and what does it evaluate?Airframe Structures
  36. 136.A technician is selecting a solid-state device to convert 28-volt DC battery power into 115-volt, 400 Hz AC power for cockpit instruments during an emergency electrical configuration. Compared to a rotary inverter, what is the main advantage of a static inverter for this application?Airframe Electrical and Instruments
  37. 137.An aircraft's electrical system is designed with an essential bus and a non-essential bus, connected through an isolation relay. During single-engine or single-generator operation, non-essential loads are automatically or manually removed to conserve remaining electrical capacity. What is this design and procedure called?Airframe Electrical and Instruments
  38. 138.A technician performs a preflight operational check of the pitot heat system on a cold ramp. Which indication confirms the pitot heat is functioning properly?Airframe Electrical and Instruments
  39. 139.A technician is troubleshooting a total air temperature (TAT) probe on a turbine-powered aircraft. During cruise flight, the TAT indication reads noticeably higher than the calculated static (outside) air temperature for that altitude, even though the probe and system are functioning correctly. What is the primary cause of this expected difference?Airframe Electrical and Instruments
  40. 140.A technician is troubleshooting a turbine engine fuel system on an aircraft that experiences fuel filter icing during high-altitude cruise in cold weather, even though the fuel meets FSII specifications. Which additional component is installed in the fuel supply line to prevent ice crystal buildup by transferring heat from engine oil to the fuel?Fuel, Cabin and Ice Control Systems
  41. 141.A technician inspecting a main landing gear tire finds excessive wear across the entire tread with feathered edges on the tread ribs. This wear pattern most likely indicatesLanding Gear Systems
  42. 142.A technician examining a semi-monocoque fuselage section identifies several ring-shaped structural members spaced along the fuselage length that give the fuselage its cross-sectional shape but do not run continuously along its length. What are these members called?Airframe Structures
  43. 143.A technician swings the magnetic compass of an aircraft on a compass rose and records the difference between the compass indication and the actual magnetic heading at various headings. What is this recorded information used to create?Airframe Electrical and Instruments
  44. 144.A technician examining a fuselage skin panel identifies numerous small, lightweight longitudinal members running between the heavier longerons, spaced closely to support the skin. What is the primary function of these members?Airframe Structures
  45. 145.During an approach with the landing gear retracted, a pilot retards the throttles below approach power. Which system alerts the pilot to this unsafe gear configuration?Landing Gear Systems
  46. 146.A technician troubleshooting a hydraulic system finds that a component allows free flow in one direction but restricts flow to a much smaller rate in the opposite direction, used to slow landing gear retraction speed. What component is this?Hydraulic and Pneumatic Systems
  47. 147.A student pilot asks a mechanic to explain the fuel selector valve positions on a high-wing single-engine trainer equipped with a four-position (LEFT, RIGHT, BOTH, OFF) fuel selector valve. Which position is normally selected for takeoff and landing?Fuel, Cabin and Ice Control Systems
  48. 148.A technician notices thin conductive wire braids attached to the trailing edges of the ailerons and rudder. What is the primary purpose of these devices?Airframe Electrical and Instruments
  49. 149.A light twin-engine airplane is equipped with a vacuum-driven attitude indicator and heading indicator, along with an electrically driven turn coordinator. What is the primary reason manufacturers commonly design gyroscopic instrument panels using two different power sources in this manner?Airframe Electrical and Instruments
  50. 150.An anti-skid braking system uses a component mounted at each main wheel to sense the wheel's rotational speed and send an electrical signal to the anti-skid control box. If this component fails, what is the most likely result?Landing Gear Systems