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FAA Aviation Mechanic General (AMG) practice questions

211 free questions with answers and explanations.

Practice test
  1. 51.A hydraulic fluid has a density of 0.0311 lb/in³. What is the weight of the fluid contained in a 250 cubic inch reservoir?Physics, Math and Fluid Lines
  2. 52.A test cart holding an avionics component weighing 64.4 pounds is pushed across a frictionless bench with a horizontal acceleration of 10 ft/sec². What horizontal force is being applied to the cart?Physics, Math and Fluid Lines
  3. 53.A circuit operating at 120 volts draws a current of 5 amperes. What is the power consumed by the circuit?Fundamentals of Electricity and Electronics
  4. 54.A loading ramp used to raise ground support equipment is 20 feet long and rises to a platform 4 feet high. Treating the ramp as an inclined plane, what is its mechanical advantage?Physics, Math and Fluid Lines
  5. 55.A technician attempts a composite structure repair using techniques he learned years ago on aluminum structures, without referring to the manufacturer's composite repair manual. The repair later fails a load test. Which Dirty Dozen human factor best explains this error?Regulations, Records and Human Factors
  6. 56.Which inspection privilege is granted to a mechanic holding an Inspection Authorization (IA) that is not available to a mechanic who holds only an Airframe and Powerplant (A&P) certificate?Regulations, Records and Human Factors
  7. 57.A technician inspecting a composite control surface with a honeycomb core suspects internal delamination or moisture intrusion but has no access to ultrasonic equipment. Which simple nondestructive method can help detect these defects?Materials, Hardware and Processes
  8. 58.A sample of hydraulic fluid weighs 7.3 pounds per gallon. Water weighs 8.34 pounds per gallon at the same temperature. What is the specific gravity of the hydraulic fluid?Physics, Math and Fluid Lines
  9. 59.An engineering drawing dimensions a shaft diameter as '0.497–0.500 in.' rather than showing a basic size with a plus/minus tolerance. What type of dimensioning method is this?Aircraft Drawings, Weight and Balance
  10. 60.A lever has an effort arm of 24 inches and a resistance arm of 6 inches. If an effort force of 50 pounds is applied, what resistance force can the lever overcome?Physics, Math and Fluid Lines
  11. 61.A drafter needs to depict a bracket so that a technician can clearly see its true length, width, and height without distortion. Which drawing technique is used to show the front, top, and side of the part as separate, related views?Aircraft Drawings, Weight and Balance
  12. 62.A capacitor with a capacitance of 10 microfarads is connected to a 1,000 Hz AC source. What is the capacitive reactance of this capacitor?Fundamentals of Electricity and Electronics
  13. 63.A circuit consists of a 10-ohm resistor (R1) connected in series with a parallel combination of two 20-ohm resistors (R2 and R3). This network is connected to a 40-volt battery. What is the total current supplied by the battery?Fundamentals of Electricity and Electronics
  14. 64.A technician is analyzing an NPN transistor operating in its normal amplifying (active) mode. What is the correct bias condition for the base-emitter and base-collector junctions?Fundamentals of Electricity and Electronics
  15. 65.A technician uses a metric caliper and measures a tube's outside diameter as 12.7 mm. Using 1 inch = 25.4 mm, what is this diameter in inches?Physics, Math and Fluid Lines
  16. 66.A mechanic is selecting replacement flight control cable that must route around several pulleys and remain flexible without kinking. Which cable construction should be selected?Materials, Hardware and Processes
  17. 67.An aircraft's mean aerodynamic chord (MAC) is 60 inches, with the leading edge of the MAC (LEMAC) located at fuselage station 200. A technician calculates the loaded CG at fuselage station 215. What is the CG location expressed as a percentage of MAC?Aircraft Drawings, Weight and Balance
  18. 68.A tube has an outside diameter of 0.500 inch and a wall thickness of 0.035 inch. What is the approximate cross-sectional area available for fluid flow inside the tube?Physics, Math and Fluid Lines
  19. 69.A hydraulic actuator piston has a full bore area of 3.0 square inches on the blind side. The piston rod has a cross-sectional area of 0.75 square inch. When system pressure of 1,000 psi is applied to retract the actuator (pressure acting on the rod-side annular area), what retract force is produced?Physics, Math and Fluid Lines
  20. 70.A mechanic is tying down a light aircraft outdoors in anticipation of high winds. What is the recommended angle between the tie-down ropes and the ground for wing and tail tie-downs?Ground Operations and Servicing
  21. 71.A technician is preparing to service the main landing gear tires on a transport-category aircraft. Why is dry nitrogen specified for tire inflation instead of shop compressed air?Ground Operations and Servicing
  22. 72.A technician is examining a detail drawing of a sheet metal bracket labeled 'SCALE: 1:2.' Using a scale ruler, a feature measures 3.00 inches on the drawing. What is the actual length of that feature on the finished part?Aircraft Drawings, Weight and Balance
  23. 73.A technician repairing 2024-T3 aluminum skin is careful not to sand through the thin, bright surface layer visible on the sheet. What is the purpose of this Alclad layer?Materials, Hardware and Processes
  24. 74.An aircraft owner hires an independent A&P mechanic to perform an annual inspection. After the inspection, a defect is later discovered that should have been caught. According to 14 CFR 91.403, who bears primary responsibility for the aircraft's continued airworthiness?Regulations, Records and Human Factors
  25. 75.An aircraft travels 450 nautical miles in 1.5 hours at a constant groundspeed. What is the aircraft's groundspeed?Physics, Math and Fluid Lines
  26. 76.A technician preparing to weigh an aircraft for a new weight and balance report positions a spirit level on a predetermined leveling point and adjusts jacks until the bubble is centered. What is the primary purpose of this leveling step?Aircraft Drawings, Weight and Balance
  27. 77.A technician is performing an oxyacetylene weld repair on a steel tubing fuselage structure. Which flame adjustment should be used to avoid introducing excess carbon or oxygen into the weld?Materials, Hardware and Processes
  28. 78.A technician inspecting an aluminum wing panel finds white powdery deposits forming at a joint where a steel bolt contacts the aluminum skin in the presence of moisture. This is most likely an example of which type of corrosion?Materials, Hardware and Processes
  29. 79.During assembly, a technician installs a castellated nut on a drilled bolt and inserts a cotter pin through the aligned holes. What is the primary purpose of this cotter pin installation?Materials, Hardware and Processes
  30. 80.A series circuit is powered by a 24-volt battery and contains three resistors. The voltmeter readings across R1 and R2 are 8 volts and 10 volts, respectively. Using Kirchhoff's Voltage Law, what is the voltage drop across R3?Fundamentals of Electricity and Electronics
  31. 81.A technician rigs a block-and-tackle pulley system with 4 rope segments supporting the load to lift an engine weighing 800 pounds. Ignoring friction, what effort force is required at the free end of the rope?Physics, Math and Fluid Lines
  32. 82.A private pilot who owns a single-engine airplane wants to perform maintenance on it himself between annual inspections. Per 14 CFR Part 43, Appendix A, which task is he authorized to perform as preventive maintenance?Regulations, Records and Human Factors
  33. 83.During a repair, a technician repeatedly bends and straightens a section of 6061-T6 aluminum sheet while trial-fitting a patch. The metal becomes progressively stiffer and more brittle, eventually cracking before the final bend is completed. Which condition describes this behavior?Materials, Hardware and Processes
  34. 84.A technician is designing a capacitor and wants to increase its capacitance without changing the dielectric material or plate spacing. What change should be made?Fundamentals of Electricity and Electronics
  35. 85.A mechanic has not exercised the privileges of an Airframe and Powerplant certificate for the past 30 months. According to 14 CFR 65.83, what must this mechanic do before performing maintenance and approving an aircraft for return to service?Regulations, Records and Human Factors
  36. 86.According to 14 CFR 43.9(a), which of the following is NOT required in a maintenance record entry for routine work performed?Regulations, Records and Human Factors
  37. 87.An outside air temperature gauge on the ramp reads 95°F. What is this temperature expressed in degrees Celsius?Physics, Math and Fluid Lines
  38. 88.A manufacturer's maintenance manual does not address a specific repair technique for a component. According to 14 CFR 43.13(a), what standard must the mechanic use for performing the work?Regulations, Records and Human Factors
  39. 89.A drafter produces a drawing that shows a single bracket completely dimensioned, including material, finish, and tolerances, with no other parts shown. What type of drawing is this?Aircraft Drawings, Weight and Balance
  40. 90.A mechanic uses a simple balance beam scale to weigh an aircraft component. A 100-pound reference weight is placed 20 inches from the fulcrum. To balance the scale, an unknown weight must be placed 25 inches from the fulcrum on the opposite side. What is the unknown weight?Physics, Math and Fluid Lines
  41. 91.During inspection of an aluminum wing spar extrusion, a technician finds the surface has lifted and is separating into thin layers parallel to the surface, giving it the appearance of pages in a book. This condition is characteristic of which type of corrosion?Materials, Hardware and Processes
  42. 92.A hydraulic actuator piston has an effective area of 4 square inches. If system pressure is 1,500 psi, how much force does the piston produce?Physics, Math and Fluid Lines
  43. 93.A technician is safety-wiring a turnbuckle on a flight control cable using the double-wrap method. According to acceptable practice, how many wraps of wire must be made around each turnbuckle terminal?Materials, Hardware and Processes
  44. 94.A technician is towing a transport-category aircraft with a tow tractor and tow bar. Which practice is essential to prevent damage to the nose gear steering mechanism during the tow?Ground Operations and Servicing
  45. 95.An aircraft weighs 3,000 lb with the CG currently at 90.0 in aft of datum, which exceeds the forward CG limit. A technician plans to add ballast at fuselage station 40.0 in to bring the CG to the forward limit of 88.0 in. How much weight must be added?Aircraft Drawings, Weight and Balance
  46. 96.An aircraft owner sells their airplane to a new owner. According to 14 CFR 91.417, which records must be transferred with the aircraft at the time of sale?Regulations, Records and Human Factors
  47. 97.According to general guidance for fabricating fluid lines, the minimum bend radius for aluminum alloy tubing is approximately 3 times the tube outside diameter. What is the minimum allowable bend radius for a 3/8 inch OD aluminum tube?Physics, Math and Fluid Lines
  48. 98.A technician is servicing an aircraft oxygen system and needs to select a compatible sealant or lubricant for a fitting. Which type of substance must be strictly avoided in oxygen system components?Ground Operations and Servicing
  49. 99.An engine cylinder has a total volume of 88 cubic inches with the piston at the bottom of its stroke, and a clearance volume of 8 cubic inches with the piston at the top of its stroke. What is the engine's compression ratio?Physics, Math and Fluid Lines
  50. 100.A technician selects tubing labeled 3/8 inch for a fluid line repair. What is the decimal equivalent of this fraction, needed to verify the size with a caliper?Physics, Math and Fluid Lines