AMT Aircraft Structures and Materials 2

Question 1

What type of stress acts along the longitudinal axis of a structural member, tending to pull it apart?

Accepted Answer

Tensile stress

Answer

Tensile stress acts along the longitudinal axis and tends to elongate or pull a structural member apart.

Question 2

Which heat treatment process is used to relieve internal stresses in aluminum alloys after machining without significantly reducing hardness?

Accepted Answer

Stress relieving anneal

Answer

Stress relieving anneal uses low temperatures to reduce residual stresses without substantially changing hardness.

Question 3

What is the purpose of a doubler plate installed on an aircraft skin?

Accepted Answer

To reinforce a weakened or repaired area

Answer

A doubler plate is bonded or riveted over a repaired or weakened skin area to restore structural strength.

Question 4

In a semi-monocoque fuselage, which members carry the primary bending loads?

Accepted Answer

Stringers and longerons

Answer

Stringers and longerons run longitudinally and carry the primary bending and tension/compression loads in a semi-monocoque structure.

Question 5

Which material property describes resistance to scratching and surface wear?

Accepted Answer

Hardness

Answer

Hardness is the material property that indicates resistance to surface indentation, scratching, and wear.

(AMT) Aviation Maintenance Technician Practice Test