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AVIATION MAINTENANCE TECHNICIAN GENERAL EXAM
COMPLETE 100 QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS)
1. What is the primary purpose of a micrometer? A. Measure current B. Measure torque C. Measure small distances D. Measure voltage Correct Answer: C Micrometers are precision tools used to measure very small linear distances. 2. Which unit measures electrical resistance? A. Volt B. Ampere C. Ohm D. Watt Correct Answer: C Resistance in an electrical circuit is measured in ohms. 3. Bernoulli’s principle relates pressure and: A. Temperature B. Velocity C. Density D. Weight Correct Answer: B Bernoulli states that as velocity increases, pressure decreases. 4. Which document lists all FAA-approved procedures for maintenance?
A. Form 337 B. TCDS C. AMM D. AD list Correct Answer: C The Aircraft Maintenance Manual contains manufacturer-approved maintenance procedures.
5. What type of current does a transformer require? A. AC B. DC C. Pulsed DC D. Static charge Correct Answer: A Transformers operate only with alternating current. 6. Which gas is used for oxy-acetylene welding? A. Nitrogen B. Argon C. Acetylene D. Helium Correct Answer: C Acetylene combined with oxygen provides a high-temperature flame. 7. The term “drag” refers to: A. Upward force B. Forward force C. Resistance to motion D. Rotational force Correct Answer: C Drag is the aerodynamic resistance opposing forward motion.
Correct Answer: B Frequency is cycles per second, measured in Hertz.
12. The standard atmospheric pressure at sea level is: A. 14.7 PSI B. 10 PSI C. 20 PSI D. 18 PSI Correct Answer: A Standard sea-level pressure is 14.7 pounds per square inch. 13. What is the purpose of a capacitor? A. Create heat B. Store electrical energy C. Reduce inductance D. Produce AC Correct Answer: B Capacitors store and release electrical charge. 14. “CG” stands for: A. Center of Gravity B. Central Guide C. Controlled Gradient D. Cargo Gate Correct Answer: A CG is the aircraft’s balance point. 15. Ohm’s law states E = A. I × R B. R ÷ I
C. I ÷ R
D. R – I
Correct Answer: A Voltage equals current multiplied by resistance.
16. A dead-man switch is used for: A. Torque wrenches B. Grinding equipment C. Rivet guns D. Soldering irons Correct Answer: B Grinding tools require a dead-man switch for safety. 17. The color of a nitrogen cylinder is: A. Blue B. Red C. Black D. Yellow Correct Answer: C Nitrogen cylinders are painted black. 18. The speed of sound at sea level is approximately: A. 760 mph B. 100 mph C. 500 mph D. 900 mph Correct Answer: A Standard Mach 1 conditions equal roughly 760 mph. 19. A megohmmeter is used to test:
23. The function of a rectifier is to: A. Increase voltage B. Convert AC to DC C. Reduce frequency D. Create inductance Correct Answer: B Rectifiers change alternating current to direct current. 24. A fuselage station is measured from: A. Wingtip B. Reference datum C. CG D. Vertical fin Correct Answer: B Stations are measured from the aircraft’s reference datum. 25. A center punch is used to: A. Remove rivets B. Mark drill locations C. Install cotter pins D. Form threads Correct Answer: B A center punch marks a spot to begin drilling. 26. Which metal is most susceptible to corrosion? A. Titanium B. Magnesium C. Stainless steel D. Cobalt
Correct Answer: B Magnesium corrodes very easily.
27. A circuit with only one path is a: A. Parallel circuit B. Series circuit C. Inductive circuit D. Capacitive circuit Correct Answer: B A series circuit has only one path for current. 28. Aircraft wire size is measured in: A. AWG B. PSI C. BTU D. SAE Correct Answer: A Wire is classified using the American Wire Gauge system. 29. Viscosity describes a fluid’s: A. Lubricity B. Temperature C. Thickness D. Purity Correct Answer: C Viscosity is resistance to flow, or thickness. 30. To prevent static electricity buildup, aircraft are: A. Insulated B. Grounded
A. Add torque B. Prevent loosening C. Add friction D. Increase preload Correct Answer: B Lock washers resist loosening due to vibration.
35. Boyle’s Law relates pressure and: A. Mass B. Volume C. Temperature D. Velocity Correct Answer: B Boyle’s Law states pressure increases as volume decreases. 36. The term “ground effect” refers to increased: A. Drag B. Lift C. Weight D. Stability Correct Answer: B Ground effect increases lift due to reduced downwash near the surface. 37. Which instrument measures current? A. Ammeter B. Voltmeter C. Tonometer D. Thermometer Correct Answer: A Ammeters measure electrical current flow.
38. The densest air occurs at: A. High altitude, hot B. High altitude, cold C. Sea level, cold D. Sea level, hot Correct Answer: C Cold, low-altitude air is most dense. 39. A standard AN bolt is identified by: A. Two raised dashes B. Cross stamp C. Single dot D. Color notch Correct Answer: A AN bolts have two raised dashes on the head. 40. A dual-scale thermometer reads in: A. BTU and PSI B. Celsius and Fahrenheit C. Rankine and Kelvin D. Inches and metric Correct Answer: B Dual-scale thermometers show both Fahrenheit and Celsius. 41. Which device stores mechanical energy? A. Spring B. Battery C. Armature D. Rheostat
C. Oil D. Metal Correct Answer: A Specific gravity uses water as the reference.
46. Corrosion needs metal, oxygen, and: A. Fuel B. Moisture C. Vibration D. Heat Correct Answer: B Moisture is required for corrosion to start. 47. Which component converts mechanical energy into electrical energy? A. Motor B. Generator C. Transformer D. Capacitor Correct Answer: B Generators convert mechanical motion into electricity. 48. The force that causes airflow to speed up over a wing is: A. Thrust B. Gravity C. Pressure differential D. Drag Correct Answer: C Lower pressure over the wing accelerates airflow. 49. What tool removes burrs after drilling?
A. File B. Deburring tool C. Scriber D. Center punch Correct Answer: B Deburring tools remove rough edges.
50. Static electricity is most dangerous when: A. Aircraft is cold B. Aircraft is grounded C. Refueling D. During takeoff Correct Answer: C Static discharge during refueling can ignite fuel vapors. 51. The main purpose of a diode is to: A. Increase resistance B. Block current in one direction C. Produce AC D. Measure voltage Correct Answer: B Diodes act as one-way electrical valves. 52. A manometer is used to measure: A. Pressure differences B. Temperature C. Voltage D. Airspeed
C. Transformer D. Battery Correct Answer: C Transformers step AC voltage up or down.
57. The datum is used to measure: A. Fuel weight B. Center of gravity C. Wing area D. Thrust Correct Answer: B CG calculations originate from the aircraft’s datum point. 58. A digital multimeter can measure: A. Only voltage B. Voltage and pressure C. Voltage, current, and resistance D. Only resistance Correct Answer: C Multimeters can check the main electrical quantities. 59. Gyroscopic precession occurs when force is applied: A. 90 degrees ahead of rotation B. 180 degrees ahead C. 45 degrees behind D. Opposite the direction of rotation Correct Answer: A Precession causes reaction 90° ahead in the direction of rotation. 60. The primary purpose of a circuit breaker is to:
A. Limit voltage B. Protect wiring C. Increase amperage D. Reduce resistance Correct Answer: B Circuit breakers stop overloads to protect the wiring.
61. VFR weather minimums are found in: A. AC 43. B. FAR Part 23 C. FAR Part 91 D. FAR Part 65 Correct Answer: C Part 91 covers general flight rules, including VFR minimums. 62. What is the term for metal’s ability to resist cracking? A. Brittleness B. Ductility C. Toughness D. Elasticity Correct Answer: C Toughness is resistance to fracture. 63. The main function of pitot-static systems is to provide: A. Electrical power B. Navigational data C. Air data D. Hydraulic pressure Correct Answer: C Pitot-static systems supply altitude, airspeed, and VSI information.
Correct Answer: B AN960 is the standard flat washer.
68. The standard frequency of AC in aircraft systems is: A. 30 Hz B. 60 Hz C. 400 Hz D. 1000 Hz Correct Answer: C Aircraft use 400-Hz AC for lighter components. 69. A capacitor opposes changes in: A. Heat B. Current C. Voltage D. Pressure Correct Answer: C Capacitors resist sudden changes in voltage. 70. A tachometer measures: A. Temperature B. Airspeed C. RPM D. Pressure Correct Answer: C Tachometers measure rotational speed. 71. Static stability refers to: A. Long-term stability B. Initial response after disturbance
C. Control stick force D. Wing load factor Correct Answer: B Static stability concerns the aircraft's first reaction to displacement.
72. A simple pulley system provides: A. Only directional change B. Torque multiplication C. Voltage increase D. No mechanical advantage Correct Answer: A A single pulley changes direction without increasing force. 73. The term AC stands for: A. Active current B. Alternating current C. Adjustable current D. Applied current Correct Answer: B AC reverses direction periodically. 74. Which metal is hardest? A. Copper B. Aluminum C. Steel D. Lead Correct Answer: C Steel is significantly harder than aluminum or copper. 75. The purpose of a synchro system is to transmit:
