AME Aircraft Fuel Systems and Fire Protection

Question 1

What is the primary function of a fuel boost pump in an aircraft fuel system?

Accepted Answer

To maintain positive fuel pressure, prevent vapor lock, and supply the engine-driven pump

Answer

To filter contaminants from fuel before engine delivery

Answer

To transfer fuel between tanks for lateral balance only

Answer

To measure fuel quantity electronically

Question 2

Introducing the wrong fuel type into an aircraft (e.g., Jet-A into an avgas aircraft) is specifically called:

Accepted Answer

Misfueling

Answer

Cross-contamination

Answer

Fuel substitution

Answer

Incorrect servicing

Question 3

Which component in a fuel system prevents fuel from flowing backward from the engine toward the tanks?

Accepted Answer

Check valve

Answer

Fuel strainer

Answer

Fuel selector valve

Answer

Firewall shutoff valve

Question 4

What does the designation 'AVGAS 100LL' mean?

Accepted Answer

Aviation gasoline with 100 octane rating and low lead content

Answer

Aviation gasoline for use below 10,000 feet only

Answer

Aviation gasoline approved for 100-hour inspection intervals

Answer

Aviation gasoline meeting 100 kPa pressure specification

Question 5

How is a fuel system water contamination check typically performed?

Accepted Answer

Draining fuel from sumps into a clear container and visually checking for water separation

Answer

Sending a sample to a laboratory for analysis

Answer

Using a refractometer to measure water content

Answer

Checking fuel color with a spectrometer

Question 6

The primary purpose of a firewall fuel shutoff valve is to:

Accepted Answer

Isolate the fuel supply from the engine compartment in case of fire or emergency

Answer

Regulate fuel pressure to the carburetor

Answer

Prevent fuel flow when the engine is not running

Answer

Balance fuel flow between multiple carburetors