Aviation Maintenance Technician (AMT) Practice
Exam – 100 Questions
1. What is the primary purpose of an airfoil?
A. Reduce drag
B. Produce lift
C. Increase thrust
D. Stabilize yaw
Rationale: Airfoils are shaped to create pressure differences between
upper and lower surfaces, producing lift.
2. Which type of stress causes a member to be pulled apart?
A. Shear
B. Tension
C. Compression
D. Torsion
Rationale: Tension is the stress resulting from forces pulling in
opposite directions.
3. What is the primary function of a magneto?
A. Boost battery voltage
B. Control fuel flow
C. Provide ignition spark independent of the aircraft electrical system
D. Regulate alternator output
Rationale: Magnetos create high-voltage spark using engine rotation
and are independent of the aircraft electrical system.
4. Which gas is used as a shielding gas in TIG welding?
,A. Oxygen
B. Nitrogen
C. Argon
D. Helium
Rationale: Argon provides an inert atmosphere preventing oxidation
during TIG welding.
5. Brake fade is caused by:
A. Excessive tire pressure
B. Overheating of brake components
C. Incorrect hydraulic fluid
D. Frozen moisture in brake lines
Rationale: Excessive heat reduces friction between brake pads and
discs, causing brake fade.
6. Which instrument measures electrical current?
A. Voltmeter
B. Ohmmeter
C. Ammeter
D. Load meter
Rationale: Ammeters measure current flow in amperes.
7. The angle between the chord line and the relative wind is called:
A. Dihedral
B. Camber
C. Angle of attack
D. Incidence angle
Rationale: Angle of attack is the angle formed by the chord line and
the relative wind.
8. What is the primary advantage of AC over DC in large aircraft
electrical systems?
, A. Less interference
B. More efficient power transmission
C. Easier battery storage
D. Lower voltage requirements
Rationale: AC systems are lighter and more efficient for high-power
distribution.
9. Which component controls cabin pressure?
A. Bleed-air regulator
B. Outflow valve
C. Turbine bypass valve
D. Ram air inlet
Rationale: The outflow valve releases air to regulate cabin pressure.
10. What is the main cause of detonation in a reciprocating engine?
A. Oil starvation
B. High cylinder temperatures and pressures
C. Too much ignition advance
D. Rich fuel mixture
Rationale: Excessive heat and pressure cause the fuel-air mixture to
explode rather than burn smoothly.
11. Water in aviation fuel is most dangerous because it:
A. Adds weight
B. Reduces octane
C. Can freeze and block fuel lines
D. Causes engine overheating
Rationale: Ice formation in fuel systems can block fuel flow, causing
engine failure.
Exam – 100 Questions
1. What is the primary purpose of an airfoil?
A. Reduce drag
B. Produce lift
C. Increase thrust
D. Stabilize yaw
Rationale: Airfoils are shaped to create pressure differences between
upper and lower surfaces, producing lift.
2. Which type of stress causes a member to be pulled apart?
A. Shear
B. Tension
C. Compression
D. Torsion
Rationale: Tension is the stress resulting from forces pulling in
opposite directions.
3. What is the primary function of a magneto?
A. Boost battery voltage
B. Control fuel flow
C. Provide ignition spark independent of the aircraft electrical system
D. Regulate alternator output
Rationale: Magnetos create high-voltage spark using engine rotation
and are independent of the aircraft electrical system.
4. Which gas is used as a shielding gas in TIG welding?
,A. Oxygen
B. Nitrogen
C. Argon
D. Helium
Rationale: Argon provides an inert atmosphere preventing oxidation
during TIG welding.
5. Brake fade is caused by:
A. Excessive tire pressure
B. Overheating of brake components
C. Incorrect hydraulic fluid
D. Frozen moisture in brake lines
Rationale: Excessive heat reduces friction between brake pads and
discs, causing brake fade.
6. Which instrument measures electrical current?
A. Voltmeter
B. Ohmmeter
C. Ammeter
D. Load meter
Rationale: Ammeters measure current flow in amperes.
7. The angle between the chord line and the relative wind is called:
A. Dihedral
B. Camber
C. Angle of attack
D. Incidence angle
Rationale: Angle of attack is the angle formed by the chord line and
the relative wind.
8. What is the primary advantage of AC over DC in large aircraft
electrical systems?
, A. Less interference
B. More efficient power transmission
C. Easier battery storage
D. Lower voltage requirements
Rationale: AC systems are lighter and more efficient for high-power
distribution.
9. Which component controls cabin pressure?
A. Bleed-air regulator
B. Outflow valve
C. Turbine bypass valve
D. Ram air inlet
Rationale: The outflow valve releases air to regulate cabin pressure.
10. What is the main cause of detonation in a reciprocating engine?
A. Oil starvation
B. High cylinder temperatures and pressures
C. Too much ignition advance
D. Rich fuel mixture
Rationale: Excessive heat and pressure cause the fuel-air mixture to
explode rather than burn smoothly.
11. Water in aviation fuel is most dangerous because it:
A. Adds weight
B. Reduces octane
C. Can freeze and block fuel lines
D. Causes engine overheating
Rationale: Ice formation in fuel systems can block fuel flow, causing
engine failure.
