Certified Aviation Maintenance Technician
(AMT) Practice Exam Verified Questions,
Correct Answers, and Detailed Explanations
for Students||Already Graded A+
1. What is the primary purpose of a static wick on an aircraft?
A) Reduce drag
B) Prevent lightning strikes
C) Discharge static electricity
D) Improve fuel efficiency
Static wicks provide a controlled path for static electricity to leave the aircraft,
preventing radio interference and sparking.
2. What is the correct mixture setting during engine start on a fuel-injected
aircraft engine?
A) Lean of peak
B) Full rich
C) Idle cut-off or slightly rich
D) Auto mixture
During start, the mixture is set near idle cut-off (or slightly rich) to prevent
flooding and allow smooth ignition.
3. Which component in a reciprocating engine reduces friction between
moving parts?
A) Piston rings
B) Lubricating oil
C) Spark plugs
D) Camshaft
,Lubricating oil forms a film between moving surfaces, reducing wear and
friction.
4. What does the term “magneto timing” refer to?
A) Synchronizing fuel flow
B) Aligning the throttle
C) Adjusting spark to occur at proper piston position
D) Aligning the propeller pitch
Magneto timing ensures spark occurs at the optimal point in the piston’s stroke
for efficient combustion.
5. Which NDT method uses high-frequency sound waves to detect internal
defects?
A) Eddy current
B) Dye penetrant
C) Ultrasonic inspection
D) Visual inspection
Ultrasonic inspection sends sound waves through material, and defects reflect
waves back for detection.
6. What is the purpose of an aircraft’s fuel boost pump?
A) Vent the fuel tank
B) Mix fuel and air
C) Ensure continuous fuel supply under all flight conditions
D) Measure fuel flow
Fuel boost pumps provide positive pressure to fuel lines, especially during low
suction conditions.
7. What is the main hazard of using contaminated fuel?
A) Reduced noise
B) Increased lubrication
C) Engine failure or power loss
D) Higher lift
, Contaminants like water or debris can cause fuel system blockage or engine
damage.
8. Which part of a turbine engine converts high-pressure gas energy into
rotational energy?
A) Compressor
B) Combustion chamber
C) Turbine
D) Inlet
The turbine extracts energy from hot gases to drive the compressor and output
shaft.
9. What is the purpose of an aircraft control cable turnbuckle?
A) Attach cables to instruments
B) Adjust cable tension
C) Reduce cable wear
D) Prevent cable vibration
Turnbuckles allow mechanics to precisely tighten control cables for proper
responsiveness.
10. Which type of corrosion results in intergranular attack along grain
boundaries?
A) Uniform corrosion
B) Pitting corrosion
C) Intergranular corrosion
D) Filiform corrosion
Intergranular corrosion attacks the metal along grain boundaries, often
weakening structural parts.
11. How often must an aircraft’s ELT (Emergency Locator Transmitter) be
inspected?
A) Every 50 hours
B) Every 12 months
(AMT) Practice Exam Verified Questions,
Correct Answers, and Detailed Explanations
for Students||Already Graded A+
1. What is the primary purpose of a static wick on an aircraft?
A) Reduce drag
B) Prevent lightning strikes
C) Discharge static electricity
D) Improve fuel efficiency
Static wicks provide a controlled path for static electricity to leave the aircraft,
preventing radio interference and sparking.
2. What is the correct mixture setting during engine start on a fuel-injected
aircraft engine?
A) Lean of peak
B) Full rich
C) Idle cut-off or slightly rich
D) Auto mixture
During start, the mixture is set near idle cut-off (or slightly rich) to prevent
flooding and allow smooth ignition.
3. Which component in a reciprocating engine reduces friction between
moving parts?
A) Piston rings
B) Lubricating oil
C) Spark plugs
D) Camshaft
,Lubricating oil forms a film between moving surfaces, reducing wear and
friction.
4. What does the term “magneto timing” refer to?
A) Synchronizing fuel flow
B) Aligning the throttle
C) Adjusting spark to occur at proper piston position
D) Aligning the propeller pitch
Magneto timing ensures spark occurs at the optimal point in the piston’s stroke
for efficient combustion.
5. Which NDT method uses high-frequency sound waves to detect internal
defects?
A) Eddy current
B) Dye penetrant
C) Ultrasonic inspection
D) Visual inspection
Ultrasonic inspection sends sound waves through material, and defects reflect
waves back for detection.
6. What is the purpose of an aircraft’s fuel boost pump?
A) Vent the fuel tank
B) Mix fuel and air
C) Ensure continuous fuel supply under all flight conditions
D) Measure fuel flow
Fuel boost pumps provide positive pressure to fuel lines, especially during low
suction conditions.
7. What is the main hazard of using contaminated fuel?
A) Reduced noise
B) Increased lubrication
C) Engine failure or power loss
D) Higher lift
, Contaminants like water or debris can cause fuel system blockage or engine
damage.
8. Which part of a turbine engine converts high-pressure gas energy into
rotational energy?
A) Compressor
B) Combustion chamber
C) Turbine
D) Inlet
The turbine extracts energy from hot gases to drive the compressor and output
shaft.
9. What is the purpose of an aircraft control cable turnbuckle?
A) Attach cables to instruments
B) Adjust cable tension
C) Reduce cable wear
D) Prevent cable vibration
Turnbuckles allow mechanics to precisely tighten control cables for proper
responsiveness.
10. Which type of corrosion results in intergranular attack along grain
boundaries?
A) Uniform corrosion
B) Pitting corrosion
C) Intergranular corrosion
D) Filiform corrosion
Intergranular corrosion attacks the metal along grain boundaries, often
weakening structural parts.
11. How often must an aircraft’s ELT (Emergency Locator Transmitter) be
inspected?
A) Every 50 hours
B) Every 12 months
