ACS Airframe Systems & Structural Maintenance 1 — Questions and Answers
Question 1: What is the primary purpose of an aircraft's hydraulic system?
- Provide electrical power
- Operate flight control surfaces (Correct answer)
- Fuel the engines
- Control cabin pressure
Correct answer: Operate flight control surfaces
The hydraulic system is used to operate aircraft components like brakes, landing gear, and flight controls.
Question 2: Which tool is commonly used to measure structural alignment in aircraft?
- Torque wrench
- Plumb bob (Correct answer)
- Caliper
- Micrometer
Correct answer: Plumb bob
A plumb bob is traditionally used to ensure vertical and horizontal alignment.
Question 3: What is the most common material used for aircraft skin?
- Steel
- Aluminum alloy (Correct answer)
- Copper
- Titanium
Correct answer: Aluminum alloy
Aluminum alloys are lightweight and corrosion-resistant, making them ideal for aircraft skins.
Question 4: What component prevents an aircraft's structure from buckling under compressive loads?
- Spars
- Stringers (Correct answer)
- Bulkheads
- Ribs
Correct answer: Stringers
Stringers are structural elements that prevent buckling by reinforcing aircraft skin.
Question 5: Which inspection method is best for detecting surface cracks on aircraft structures?
- Ultrasonic testing
- Dye penetrant inspection (Correct answer)
- Radiographic inspection
- Eddy current testing
Correct answer: Dye penetrant inspection
Dye penetrant inspection is a popular method for identifying surface-breaking defects.
Question 6: What is the main purpose of a pressurization system in an aircraft?
- Provide fresh air
- Prevent corrosion
- Maintain cabin pressure (Correct answer)
- Vent fuel tanks
Correct answer: Maintain cabin pressure
Pressurization systems maintain safe cabin pressure at high altitudes.
Question 7: What type of rivet is commonly used for aircraft assembly?
- Solid rivet (Correct answer)
- Blind rivet
- Tubular rivet
- Split rivet
Correct answer: Solid rivet
Solid rivets are extensively used in aircraft structures for strength and reliability.
Question 8: How often should aircraft control cables be inspected?
- Every 50 hours
- Every 100 hours (Correct answer)
- Every 200 hours
- Only during major overhaul
Correct answer: Every 100 hours
Control cables should be inspected periodically as prescribed by the manufacturer and FAA regulations, often every 100 flight hours.
Question 9: Which tool is essential for checking the torque of aircraft fasteners?
- Caliper
- Micrometer
- Torque wrench (Correct answer)
- Rivet gun
Correct answer: Torque wrench
A torque wrench ensures that fasteners are tightened to the correct specifications.
ACS Airframe Systems & Structural Maintenance 1
What is the primary purpose of an aircraft's hydraulic system?