AMT Airframe Systems & Components 2 — Questions and Answers
Question 1: What type of corrosion appears as a white or gray powdery deposit on aluminum aircraft surfaces?
- Intergranular corrosion
- Galvanic corrosion
- Surface oxidation corrosion (Correct answer)
- Stress corrosion cracking
Correct answer: Surface oxidation corrosion
Surface oxidation on aluminum produces a white or gray powdery aluminum oxide deposit on the metal's surface.
Question 2: In a hydraulic system, what is the purpose of a hydraulic fuse?
- To filter contaminants from fluid
- To automatically shut off flow if a downstream rupture occurs (Correct answer)
- To regulate system pressure
- To prevent fluid from returning to the reservoir
Correct answer: To automatically shut off flow if a downstream rupture occurs
A hydraulic fuse automatically closes to stop fluid flow when it detects a flow rate that indicates a line rupture downstream.
Question 3: Which type of aircraft skin joint allows thermal expansion while maintaining structural integrity?
- Butt joint
- Lap joint
- Joggle joint (Correct answer)
- Splice joint
Correct answer: Joggle joint
A joggle joint offsets one piece of skin to allow overlap without creating a raised seam, accommodating thermal expansion.
Question 4: What is the minimum bend radius requirement primarily intended to prevent in sheet metal work?
- Warping of adjacent panels
- Cracking on the outside of the bend (Correct answer)
- Work hardening on the inside radius
- Buckling of the sheet
Correct answer: Cracking on the outside of the bend
Minimum bend radius prevents tensile cracking on the outer surface of the bend where metal is stretched most severely.
Question 5: An aircraft's angle of incidence is defined as the angle between the wing chord line and the:
- Relative wind
- Longitudinal axis of the fuselage (Correct answer)
- Horizontal datum plane
- Vertical axis
Correct answer: Longitudinal axis of the fuselage
Angle of incidence is the fixed angle between the wing chord line and the aircraft's longitudinal axis, built into the airframe.
Question 6: When inspecting a control cable for wear, what condition requires immediate cable replacement?
- Slight surface oxidation on outer wires
- More than three broken wires in one cable lay (Correct answer)
- Minor kinking that can be straightened by hand
- Dirt accumulation on the outer wires
Correct answer: More than three broken wires in one cable lay
FAA standards require cable replacement when more than three broken wires are found within one cable lay length.
Question 7: What is the function of a torque tube in an aircraft flight control system?
- To absorb vibration between control surfaces
- To transmit rotational force along its axis to actuate a control surface (Correct answer)
- To limit maximum deflection of control surfaces
- To connect push-pull tubes end to end
Correct answer: To transmit rotational force along its axis to actuate a control surface
A torque tube transmits torsional (rotational) loads along its length to drive a control surface or mechanism.
AMT Airframe Systems & Components 2
What type of corrosion appears as a white or gray powdery deposit on aluminum aircraft surfaces?