Airframe Mechanic Certification Aircraft Structures 3

Question 1

Which type of wing construction uses the skin as the primary load-carrying element with minimal internal framework?

Accepted Answer

Monocoque

Answer

Monocoque construction relies on the outer skin to carry all or most structural loads, with minimal internal supporting structure.

Question 2

What effect does cold working (such as shot peening) have on aluminum aircraft structure?

Accepted Answer

Introduces compressive residual stress to improve fatigue life

Answer

Shot peening induces compressive residual stresses in the surface layer, which counteract tensile fatigue stresses and significantly extend component life.

Question 3

What is the purpose of a fail-safe design philosophy in aircraft structure?

Accepted Answer

Ensure the structure can sustain loads after partial failure until detected

Answer

Fail-safe design ensures that if one structural element fails, remaining elements carry loads safely until the damage is found during routine inspection.

Question 4

When inspecting a tubular steel fuselage truss, which type of damage is most critical to detect at weld joints?

Accepted Answer

Cracks or porosity

Answer

Cracks and porosity at weld joints represent structural discontinuities that can propagate under cyclic loads and lead to sudden failure.

Question 5

What is the term for the tendency of a long, slender column to buckle sideways when subjected to compressive loads?

Accepted Answer

Euler buckling

Answer

Euler buckling describes the instability of a slender column under axial compression, where it deflects laterally rather than compressing uniformly.

Airframe Mechanic Certification Practice Test

Airframe Mechanic Certification Practice Test

Airframe Mechanic Certification Aircraft Structures 3