FREE Airframe Mechanic Aircraft Structures Questions and Answers

Question 1

Which type of aircraft fuselage construction relies primarily on the strength of its skin or covering to carry the main structural loads?

Accepted Answer

Monocoque

Answer

Truss

Answer

Semi-monocoque

Answer

Geodetic

Question 2

A mechanic is inspecting a wing spar and notices that the lower surface of the spar is slightly elongated, while the upper surface is slightly compressed. Which type of stress is this indicative of?

Accepted Answer

Bending

Answer

Torsion

Answer

Shear

Answer

Tension

Question 3

In a semi-monocoque fuselage, what are the primary functions of the longerons and stringers?

Accepted Answer

To provide longitudinal strength and stiffen the skin against buckling.

Answer

To provide the aerodynamic shape and serve as the primary covering.

Answer

To absorb landing shock and transfer it to the wing structure.

Answer

To create separate compartments for fuel and cargo.

Question 4

While performing a 100-hour inspection on an aluminum aircraft operating in a coastal, high-humidity environment, a mechanic discovers fine, thread-like lines of corrosion under the paint, starting from a scratched area. What is this type of corrosion called?

Accepted Answer

Filiform corrosion

Answer

Pitting

Answer

Intergranular corrosion

Answer

Fretting corrosion

Question 5

What are the principal structural members of a wing that run from the root to the tip and carry most of the bending loads?

Accepted Answer

Spars

Answer

Ribs

Answer

Stringers

Answer

Formers

Question 6

A twisting force is applied to an aircraft engine mount during operation. What is the primary type of stress this component must resist?

Accepted Answer

Torsion

Answer

Compression

Answer

Shear

Answer

Tension