AMT Aircraft Fuel Systems

Question 1

What type of fuel is used in most turbine-powered aircraft?

Accepted Answer

Jet-A

Answer

Jet-A is the standard turbine fuel used in most commercial and turbine-powered aircraft due to its high flash point, energy density, and wide availability.

Question 2

What is the primary purpose of an electric fuel boost pump in aircraft fuel systems?

Accepted Answer

To provide positive fuel pressure during start and prevent vapor lock at altitude

Answer

Boost pumps supply positive inlet pressure to the engine-driven pump, ensuring adequate fuel flow during engine start and preventing vapor lock at high altitudes where atmospheric pressure is low.

Question 3

What is the most common material used in the construction of aircraft integral fuel tanks?

Accepted Answer

Aluminum alloy

Answer

Aluminum alloy is the standard material for aircraft fuel tanks because it is lightweight, corrosion-resistant when in contact with aviation fuels, and provides excellent structural integrity.

Question 4

What is the function of a fuel primer in a reciprocating aircraft engine?

Accepted Answer

To inject raw fuel directly into the engine cylinders or intake to aid cold starts

Answer

A fuel primer injects raw fuel directly into the engine cylinders or intake manifold, enriching the mixture to the point where ignition can occur during cold-weather engine starting.

Question 5

What does a fuel flow indicator measure on a turbine-powered aircraft?

Accepted Answer

Rate of fuel consumption, typically in pounds per hour

Answer

A fuel flow indicator measures the rate at which fuel is being consumed, expressed in pounds per hour (turbine) or gallons per hour (piston), which is critical for fuel planning and engine performance monitoring.

AMT - Certified Aircraft Maintenance Technician Practice Test

AMT - Certified Aircraft Maintenance Technician Practice Test

AMT Aircraft Fuel Systems