A&P Aircraft Fuel Systems 2

Question 1

Which type of fuel metering system is most susceptible to carburetor ice formation?

Accepted Answer

Float-type carburetor

Answer

Float-type carburetors are most susceptible to icing because fuel vaporization combined with the pressure drop at the venturi causes significant temperature decreases that promote ice formation.

Question 2

What is the primary purpose of a crossfeed fuel system in a multi-engine aircraft?

Accepted Answer

To allow any engine to draw fuel from any tank on the aircraft

Answer

A crossfeed system allows each engine to draw fuel from any tank, providing fuel management flexibility and enabling continued operation in the event of a fuel pump or engine failure.

Question 3

How does a fuel injection system differ from a float-type carburetor in delivering fuel?

Accepted Answer

Fuel injection meters and delivers fuel under pressure directly to the intake ports or cylinders

Answer

Fuel injection systems meter and deliver fuel under pressure directly to the intake port or cylinder, providing more precise fuel metering and eliminating carburetor icing risk.

Question 4

What color is 80/87 aviation gasoline?

Accepted Answer

Red

Answer

Grade 80/87 aviation gasoline is dyed red to distinguish it from higher octane grades such as 100LL (blue) and 100/130 (green).

Question 5

What is the function of the fuel selector valve in an aircraft fuel system?

Accepted Answer

To select which fuel tank supplies fuel to the engine

Answer

The fuel selector valve allows the pilot or crew to choose which fuel tank will supply fuel to the engine, enabling proper fuel management and tank balancing.

A&P - Certified Airframe and Powerplant Mechanics Practice Test

A&P - Certified Airframe and Powerplant Mechanics Practice Test

A&P Aircraft Fuel Systems 2