Airframe Mechanic Certification Aircraft Systems & Components 2 — Questions and Answers
Question 1: What is the primary purpose of an aircraft's spoiler system?
- Increase lift during takeoff
- Reduce lift and increase drag during descent (Correct answer)
- Provide directional control on the ground
- Increase engine thrust during landing
Correct answer: Reduce lift and increase drag during descent
Spoilers disrupt airflow over the wing to reduce lift and increase drag, allowing steeper descents without increasing airspeed.
Question 2: Which component in a hydraulic system prevents pressure from exceeding a safe limit?
- Check valve
- Selector valve
- Relief valve (Correct answer)
- Accumulator
Correct answer: Relief valve
A relief valve opens automatically when system pressure exceeds a preset limit, routing fluid back to the reservoir.
Question 3: What type of corrosion forms as a white powdery deposit on aluminum aircraft structures?
- Intergranular corrosion
- Fretting corrosion
- Oxidation corrosion (Correct answer)
- Filiform corrosion
Correct answer: Oxidation corrosion
Oxidation corrosion on aluminum produces aluminum oxide, which appears as a white or gray powdery surface deposit.
Question 4: In a fuel system, what is the function of a boost pump?
- Filter contaminants from the fuel
- Maintain positive fuel pressure to the engine-driven pump (Correct answer)
- Regulate fuel temperature
- Measure fuel quantity
Correct answer: Maintain positive fuel pressure to the engine-driven pump
Boost pumps provide positive fuel pressure to prevent cavitation in the engine-driven pump, especially during high-altitude operations.
Question 5: What is the purpose of a Zerk fitting on an aircraft landing gear component?
- Secure the torque link bolt
- Provide a grease injection point for lubrication (Correct answer)
- Measure strut extension
- Vent hydraulic pressure
Correct answer: Provide a grease injection point for lubrication
A Zerk (grease) fitting allows technicians to inject grease into bearings and joints using a grease gun without disassembly.
Question 6: Which aircraft wing design feature increases the critical angle of attack before stall?
- Winglet
- Leading edge slat (Correct answer)
- Trailing edge flap
- Wing fence
Correct answer: Leading edge slat
Leading edge slats extend the wing's leading edge, increasing camber and allowing the wing to operate at a higher angle of attack before stalling.
Question 7: When performing a continuity check on a control cable system, a technician finds an open circuit. What does this most likely indicate?
- Excessive cable tension
- A broken or disconnected cable (Correct answer)
- Incorrect cable routing
- Moisture in the conduit
Correct answer: A broken or disconnected cable
An open circuit in a cable system continuity check indicates the electrical path is broken, most commonly due to a broken or disconnected wire or cable.
Airframe Mechanic Certification Aircraft Systems & Components 2
What is the primary purpose of an aircraft's spoiler system?