AMT Aircraft Landing Gear Systems

Question 1

What is the primary purpose of a shimmy damper on aircraft landing gear?

Accepted Answer

To prevent oscillation of the nose wheel assembly

Answer

A shimmy damper dampens nose wheel oscillations (shimmy) that can occur during ground operations by providing hydraulic resistance to rapid lateral movement.

Question 2

In an oleo-pneumatic shock strut, landing shock is cushioned primarily by:

Accepted Answer

Nitrogen gas compression and hydraulic fluid metering through orifices

Answer

Oleo-pneumatic struts use compressed nitrogen gas and hydraulic fluid forced through metering orifices to absorb and dissipate landing shock energy during compression.

Question 3

Torque links (scissors links) on an oleo shock strut serve to:

Accepted Answer

Prevent rotation of the piston while allowing axial (vertical) movement

Answer

Torque links connect the inner and outer cylinders of an oleo strut, preventing rotational movement of the piston while allowing it to move axially for shock absorption.

Question 4

What type of landing gear arrangement is most commonly used on modern large transport aircraft?

Accepted Answer

Retractable tricycle gear

Answer

Retractable tricycle gear is standard on modern transport aircraft because it reduces aerodynamic drag in flight and provides stable ground handling with good pilot forward visibility.

Question 5

The purpose of a downlock in a retractable landing gear system is to:

Accepted Answer

Hold the landing gear in the fully extended position during flight

Answer

A downlock mechanically secures the landing gear in the fully extended position during flight, preventing inadvertent retraction or collapse under aerodynamic or asymmetric loads.

(AMT) Aviation Maintenance Technician Practice Test

(AMT) Aviation Maintenance Technician Practice Test

AMT Aircraft Landing Gear Systems