A&P Aircraft Fuel Systems

Question 1

What color is 100LL aviation gasoline?

Accepted Answer

Blue

Answer

Red

Answer

Green

Answer

Purple

Question 2

What type of pump is typically used as the electric boost pump in an aircraft fuel system?

Accepted Answer

Centrifugal pump

Answer

Gear-type pump

Answer

Vane-type pump

Answer

Piston-type pump

Question 3

What is an integral fuel tank?

Accepted Answer

A portion of the aircraft structure that has been sealed to contain fuel

Answer

A removable tank that can be replaced as a unit

Answer

A rubber bladder installed within the wing structure

Answer

An aluminum tank riveted to the exterior of the aircraft

Question 4

What is the primary purpose of a fuel strainer (gascolator) in an aircraft fuel system?

Accepted Answer

To remove water and sediment from the fuel

Answer

To increase fuel pressure before entering the carburetor

Answer

To measure the quantity of fuel remaining in the tanks

Answer

To prevent vapor lock in the fuel lines

Question 5

Jet-A turbine engine fuel appears what color in its natural state?

Accepted Answer

Clear to straw-colored

Answer

Blue

Answer

Red

Answer

Green

Question 6

What is 'vapor lock' in an aircraft fuel system?

Accepted Answer

A condition where fuel vaporizes in the lines, blocking adequate fuel flow to the engine

Answer

A safety lock on the fuel filler cap to prevent overfilling

Answer

A blockage caused by debris in the fuel vent line

Answer

A mechanical seizure of the fuel selector valve

Question 7

What is the purpose of fuel tank vents in an aircraft fuel system?

Accepted Answer

To maintain atmospheric pressure in the tank and allow proper fuel flow as fuel is consumed

Answer

To release excess fuel pressure during climb

Answer

To provide a drain point for water removal from the tank

Answer

To allow fuel quantity gauges to reference atmospheric pressure