Airframe Mechanic Certification Aircraft Systems & Components 3

Question 1

What is the primary structural function of an aircraft's longerons?

Accepted Answer

Carry primary bending loads along the length of the fuselage

Answer

Longerons are primary longitudinal structural members that carry bending loads along the fuselage length.

Question 2

In an oleo-pneumatic landing gear strut, which two fluids are typically used?

Accepted Answer

Hydraulic fluid and nitrogen

Answer

Oleo struts use hydraulic fluid to dampen shock loads and nitrogen (or air) as a compressible medium to absorb landing energy.

Question 3

What does the term 'dihedral' refer to in aircraft wing design?

Accepted Answer

The upward angle of the wings relative to the horizontal

Answer

Dihedral is the upward angle of the wings from the root to the tip when viewed from the front, which improves lateral stability.

Question 4

Which type of rivet is NOT suitable for use in aircraft structural applications?

Accepted Answer

Pop (blind) rivet in primary structure

Answer

Pop (blind) rivets are not approved for use in primary structural applications because they do not provide the same strength as solid shank rivets.

Question 5

What is the purpose of a fire sleeve on aircraft tubing?

Accepted Answer

Provide fire-resistant protection for fluid-carrying lines

Answer

Fire sleeves are installed over fluid-carrying lines in engine compartments to protect them from flame and heat in the event of a fire.

Airframe Mechanic Certification Practice Test