Fuel Systems

Question 1

Is there any reason why a fuel jettison system might be required on a small aircraft

Answer 1

Yes, if the maximum takeoff weight exceeds the maximum allowable landing weight

Question 2

What are some other names for a single point fueling system

Answer 2

An underwing or pressure fueling system

Question 3

The fuel selector valve from multi-engine aircraft must have at least three positions. What are they?

Answer 3

ON, OFF and Crossfeed

Question 4

Why do some fuel tanks have internal baffles

Answer 4

To prevent fuel surging from changes in the aircraft altitude

Question 5

What are the two types of fuel cells

Answer 5

Wet wing and bladder type

Question 6

What does the term wet wing mean

Answer 6

Part of a wing structure that is sealed and used as a fuel tank

Question 7

How is the weight of the fuel supported when bladder type fuel cells are used

Answer 7

Supported by the aircraft structure

Question 8

Why do turbine engine aircraft have fuel temperature indicating systems

Answer 8

To determine if the fuel is cold enough to produce ice

Question 9

Name four types of fuel quantity gauging systems currently in use

Answer 9

Sight gauges, mechanical, electrical, and electronic gauges

Question 10

Why are electronic fuel quantity indicating systems more accurate than other types

Answer 10

They measure the mass of the fuel instead of the volume

Question 11

What are drip gauges and sight gauges

Answer 11

An underwing,fuel gauge used to check the fuel level in the tank

Question 12

What is the purpose of an in-transit light associated with electrically operated fuel tank shutoff valve

Answer 12

Tells that the valve is moving between one position and another

Question 13

For what reason is a fuel jettison system usually divided into two separate independent systems one for each wing

Answer 13

Maintain lateral stability

Question 14

What procedures should be followed regarding gasket and seals when replacing fuel system components

Answer 14

All old gaskets and seals should be replaced with new ones

Question 15

How is a tank checked for leaks followed a patch or welding repair

Answer 15

tank is pressurized using air pressure and liquid soap

Question 16

Name some advantages of a single-point fueling system

Answer 16

reduces fueling time, contamination, fire, and eliminates damage to the aircraft skin

Question 17

Why should you wait for a period of time after fueling an aircraft before checking the fuel sumps

Answer 17

allow water and contaminants to settle to the drain point

Question 18

Why do some aircraft have fuel jettison systems

Answer 18

To reduce the weight of the aircraft to the maximum allowable landing weight

Question 19

Is it possible for fuel systems to develop a leak that has no visible evidence such as a stain or spot and if so how

Answer 19

Yes a internal component such as a valve could could develop a leak

Question 20

What is the purpose of warning lights in connection with fuel systems

Answer 20

indicates when the fuel pressure is too low or when the fuel quantity in a tank is below a certain amount

Question 21

What is a Crossfeed system

Answer 21

Interconnected system designed to fed fuel from any tank to any engine

Question 22

Which type of fuel quantity gauge is considered to be more accurate than the other types

Answer 22

The electronic capacitance type because it measures in weight

Question 23

Where are fuel systems strainers located

Answer 23

One located in the outlet to the tank.
The main strainer is located in the fuel line between the outlet of the fuel tank and the inlet to the fuel metering device

Question 24

What must be done after a fuel system strainer has been cleaned or replaced

Answer 24

system must be tested for leaks by pressurizing the system

Question 25

What color is grade 100LL fuel

Answer 25

Blue