Test on Aircraft Fuel Systems Explained

Question 1: There are five general types of fuel quantity gages.

A. Ano

B. Ne

Explanation: The study materials indicate there are four general types of fuel quantity gages: sight glass, mechanical, electrical, and electronic.

Question 2: Is the main fuel system strainer located in the fuel line after the fuel metering device?

A. Ano

B. Ne

Explanation: The main strainer is in the fuel line between the outlet of the fuel tank and the inlet to the fuel metering device, not after it.

Question 3: What is the primary function of a cross-feed system in an aircraft fuel system?

A. It allows fuel to be transferred from one tank to another.

B. It allows fuel from any tank to flow to any engine.

C. It prevents fuel from surging back and forth in the tanks during flight.

D. It is used to jettison fuel in an emergency.

Explanation: A cross-feed system allows fuel from any tank to flow to any engine, providing flexibility in fuel management.

Question 4: According to the study materials, why is the electronic capacitance type fuel quantity gage considered more accurate than other types?

A. It uses advanced pressure sensors for exact measurement.

B. It measures fuel by weight instead of by gallons.

C. It has a built-in self-calibration feature.

D. It directly detects the fuel's chemical composition.

Explanation: The electronic capacitance type fuel quantity gage is more accurate because it measures by weight instead of gallons, as stated in the study materials.

Question 5: Before a welded fuel tank can be repaired by welding, all fuel vapors must be purged from the tank.

A. Ano

B. Ne

Explanation: All the fuel vapors must be purged by flowing live steam through the tank, by soaking it in boiling water, or by chemically neutralizing the fumes before a welded fuel tank can be repaired by welding.