Step2Study

FAA Aviation Mechanic Airframe (AMA) practice questions

300 free questions with answers and explanations.

Practice test
  1. 51.An aircraft's braking system automatically releases and reapplies brake pressure to individual wheels during a heavy braking landing on a wet runway. This function is performed by theLanding Gear Systems
  2. 52.An accumulator precharge check is being performed on an aircraft with a hydraulic system operating pressure of 3,000 psi. According to typical maintenance practice, what nitrogen precharge pressure should the technician expect to find in the accumulator?Hydraulic and Pneumatic Systems
  3. 53.A technician inspecting a high-strength steel landing gear trunnion finds fine intergranular cracks that developed while the part was under sustained tensile stress in a corrosive environment, even though the part was never subjected to a fatigue-cycling load. What type of failure mechanism does this describe?Airframe Structures
  4. 54.An aircraft's main hydraulic system normally operates at 3,000 psi, but the wheel brake system is limited to a maximum of 1,500 psi. Which component allows the brake system to safely share the same hydraulic power source?Hydraulic and Pneumatic Systems
  5. 55.A technician examining a wing structure finds a short rib installed forward of the front spar, extending only from the spar to the leading edge, whose purpose is to maintain the airfoil shape of the leading edge. What is this rib called?Airframe Structures
  6. 56.A pilot asks a technician how often the ATC transponder system must be tested and inspected under 14 CFR to remain legal for IFR and controlled airspace operations. What is the required interval?Airframe Inspection
  7. 57.A technician signs off a minor repair to a wing inspection panel in the aircraft maintenance records. According to 14 CFR 43.9, which of the following must be included in the record entry?Airframe Inspection
  8. 58.A technician needs to service a landing gear emergency pneumatic system's storage bottle with nitrogen from a service cart. Which fitting, incorporating an internal check valve, allows the bottle to be charged while automatically sealing to prevent pressure loss when the servicing cart hose is disconnected?Hydraulic and Pneumatic Systems
  9. 59.A transport-category aircraft experiences a complete failure of the normal cabin pressurization system at a moderate altitude. The flight crew selects the ram air system to provide emergency cabin ventilation. Under what condition is the ram air valve typically designed to open?Fuel, Cabin and Ice Control Systems
  10. 60.An electrically driven auxiliary hydraulic pump is controlled by a pressure switch that starts the pump motor when system pressure drops to 2,700 psi (cut-in) and stops the motor when pressure rises to 3,000 psi (cut-out). What is the pressure differential of this switch, and what is its primary purpose?Hydraulic and Pneumatic Systems
  11. 61.A technician connects two 12-volt, 20 ampere-hour batteries in series to supply a 24-volt DC bus. What is the resulting voltage and capacity of the combined battery pack?Airframe Electrical and Instruments
  12. 62.A technician inspects pneumatic deicer boots on an aircraft that has been stored outdoors for an extended period and finds fine surface cracking (crazing) unrelated to normal flexing damage. What is the most likely cause of this condition?Fuel, Cabin and Ice Control Systems
  13. 63.A hydraulic filter element is marked as rated at 15 microns absolute. What does this rating indicate?Hydraulic and Pneumatic Systems
  14. 64.A technician functionally tests the cabin pressurization controller on a transport-category aircraft. During a climb, the cabin altitude changes from sea level to 4,000 feet in 10 minutes. What is the cabin rate of climb, and how does this compare to the typical maximum allowable rate for passenger comfort?Fuel, Cabin and Ice Control Systems
  15. 65.An aircraft's main wheel brakes are normally powered by the primary hydraulic system, but an emergency pneumatic system using a compressed nitrogen bottle is installed for use if hydraulic pressure is lost. Which valve automatically connects whichever source (hydraulic or pneumatic) is providing pressure to the brakes, while blocking flow back into the unpressurized source?Hydraulic and Pneumatic Systems
  16. 66.A technician is selecting circuit protection for a new avionics installation. Which characteristic is required of an aircraft circuit breaker but is not necessarily found in a fuse?Airframe Electrical and Instruments
  17. 67.A technician troubleshoots a battery that will not connect to the bus even though the battery master switch is selected ON and battery voltage is present at the switch. The technician suspects the battery contactor (solenoid) itself. What is the correct explanation of how this component normally functions?Airframe Electrical and Instruments
  18. 68.A technician reviewing an aircraft's maintenance manual finds a mandatory component replacement time listed in the Airworthiness Limitations Section (ALS). The aircraft owner asks if the operator can extend this replacement interval based on their own fleet experience data. What must the technician tell the owner?Airframe Inspection
  19. 69.A mechanic is servicing a turbine-powered aircraft with fuel containing fuel system icing inhibitor (FSII). What hazard does FSII primarily protect against?Fuel, Cabin and Ice Control Systems
  20. 70.During an inspection of a composite wing skin, a technician taps the surface with a coin and hears a dull, flat sound in one area compared to a clear ringing sound elsewhere. What does this indicate?Airframe Inspection
  21. 71.A technician is inspecting a transport-category wing in which the fuel tank is formed directly by the wing ribs, spars, and skin, sealed internally with a fuel-resistant sealant rather than using a separate bladder or rigid removable tank. This type of fuel tank is known as a(n):Fuel, Cabin and Ice Control Systems
  22. 72.A technician is testing the cabin pressurization system of a transport-category aircraft and observes that the pressurization controller automatically repositions the outflow valve as the aircraft climbs. What is the primary function of the pressurization controller?Fuel, Cabin and Ice Control Systems
  23. 73.An aircraft uses a remote-indicating compass system in which a transmitter unit senses magnetic heading and electrically transmits that data to a cockpit indicator without a direct mechanical linkage. What type of device performs this heading transmission function?Airframe Electrical and Instruments
  24. 74.An AC alternator on an aircraft has 4 poles and is driven at a constant speed of 1,800 RPM. What output frequency does the alternator produce?Airframe Electrical and Instruments
  25. 75.A technician needs to inspect a high-strength steel landing gear axle for surface and near-surface fatigue cracks without disassembling the axle further. Which nondestructive inspection method is appropriate for this ferromagnetic part?Airframe Structures
  26. 76.A pneumatic emergency landing gear system stores air in a bottle charged to 3,000 psi, but the landing gear actuating cylinders are designed to operate safely at only 1,000 psi. Which component reduces the high bottle pressure to the correct working pressure before the air reaches the actuators?Hydraulic and Pneumatic Systems
  27. 77.During a walk-around inspection, a technician notices thin, thread-like filaments of corrosion product forming random worm-like trails beneath the paint film on an aluminum wing skin, without any visible pitting on the bare metal surface. What type of corrosion is this most likely to be?Airframe Structures
  28. 78.A technician inspecting an extruded aluminum wing spar cap finds the surface layers separating and lifting like the pages of a book, running parallel to the direction of the original metal grain flow. What type of corrosion produces this characteristic pattern?Airframe Structures
  29. 79.A newly certificated A&P technician is preparing to perform an annual inspection on a Piper PA-28 and wants to know the minimum scope of items that must be inspected. Which document provides the FAA-required checklist of items and areas that must be inspected during an annual or 100-hour inspection?Airframe Inspection
  30. 80.A technician inspecting a fuel tank vent system notes a fine wire mesh screen installed within the vent line near the tank vent outlet. What is the purpose of this component?Fuel, Cabin and Ice Control Systems
  31. 81.During landing gear retraction on a light twin, the gear doors must open fully before the landing gear begins to retract into the wheel well, to avoid structural interference. Which hydraulic component is specifically designed to enforce this order of operation?Hydraulic and Pneumatic Systems
  32. 82.A technician is comparing conventional thermal circuit breakers to arc fault circuit breakers (AFCBs) being installed in a new transport-category aircraft wiring system. What key capability distinguishes an AFCB from a conventional thermal circuit breaker?Airframe Electrical and Instruments
  33. 83.On a turbine-powered transport aircraft, the wing leading edge anti-ice system uses hot air routed through small perforated tubes running the length of the wing. What is the source of this hot air?Fuel, Cabin and Ice Control Systems
  34. 84.During a visual inspection of a riveted aluminum lap joint, a technician observes a dark, sooty stain radiating from around several rivet heads. What does this condition most likely indicate?Airframe Inspection
  35. 85.During a corrosion inspection of an aluminum wing spar cap near a drain hole, a technician notices small, localized craters with a rough, irregular surface texture but no significant material loss elsewhere. What type of corrosion is most likely present?Airframe Inspection
  36. 86.A carbon-pile voltage regulator controls a DC generator's field current using a stack of carbon discs whose resistance is varied by spring pressure and an electromagnetic coil connected across the generator output. As generator output voltage rises above the set point, current through the sensing coil increases, pulling the plunger away from the carbon stack and reducing compression on the discs. What is the resulting effect on generator output voltage?Airframe Electrical and Instruments
  37. 87.During postflight inspection, a technician finds a nickel-cadmium battery case warped and discolored with a strong odor. Which condition most likely caused this damage?Airframe Electrical and Instruments
  38. 88.A composite general aviation aircraft was struck by lightning during flight. During the post-strike inspection, what type of damage should the technician expect to find at the strike entry and exit points?Airframe Inspection
  39. 89.A technician is teaching a trainee about switches used in aircraft electrical systems. The trainee points to a switch with one common terminal that can be connected to either of two other terminals, allowing it to control two separate circuits from a single lever, such as a landing/taxi light switch. This is best described as which type of switch?Airframe Electrical and Instruments
  40. 90.A technician inspecting an aluminum wing spar attach fitting notices fine cracks that appear to follow the direction of the original grain flow of the metal, occurring after exposure to a corrosive environment and sustained tensile stress. This is most consistent with which type of corrosion damage?Airframe Structures
  41. 91.A technician is troubleshooting a hydraulic brake system that uses a component to reduce full system pressure to a lower, regulated pressure suitable for the brakes, since the aircraft's brakes cannot tolerate full hydraulic system pressure. Which component performs this function?Landing Gear Systems
  42. 92.A technician is servicing a pneumatic emergency landing gear extension system's air storage bottle and must select the correct charging gas. Why is dry nitrogen specified rather than shop compressed air for this system?Hydraulic and Pneumatic Systems
  43. 93.A technician reviews a maintenance manual specifying replacement of a skin panel with 2024-T3 aluminum alloy. What does the 'T3' temper designation indicate about this material?Airframe Structures
  44. 94.A technician needs to inspect an aluminum casting for surface cracks, but the part is nonferrous and cannot be magnetized. Which nondestructive inspection method should be used?Airframe Structures
  45. 95.A technician needs to inspect a thick aluminum wing spar cap for internal subsurface cracks and delaminations without disassembling the structure. The inspection method uses high-frequency sound waves transmitted into the material, with reflections analyzed to detect discontinuities. Which NDI method is this?Airframe Structures
  46. 96.A technician is inspecting the airspeed indicator on a single-engine airplane equipped with flaps. Which color marking on the dial indicates the flap operating speed range?Airframe Electrical and Instruments
  47. 97.A composite structures technician is selecting core material for a sandwich panel repair that will be exposed to a moist environment and must resist moisture absorption better than standard aluminum honeycomb. Which core material is best suited for this application?Airframe Structures
  48. 98.During a functional test of a transport-category aircraft's pressurization warning system, a technician confirms that a warning horn and light activate when cabin altitude reaches a specific value. At approximately what cabin altitude does the cabin altitude warning system typically activate?Fuel, Cabin and Ice Control Systems
  49. 99.A technician checks the sight gauge on a hydraulic reservoir and observes fluid that is a deep purple color rather than the reddish tint expected. This coloring most likely indicates the system is serviced with which type of hydraulic fluid?Hydraulic and Pneumatic Systems
  50. 100.A tire installed on a jet transport main landing gear has no inner tube and depends on an airtight seal between the tire bead and the wheel rim. This type of tire is classified as aLanding Gear Systems