Fuel Systems

Question 1

What are the fuel flow requirements for gravity feed fuel systems?

Answer 1

At least 150% of the takeoff fuel consumption

Question 2

What are the fuel flow requirements for pressure pump fuel systems?

Answer 2

At least 125% of takeoff fuel flow

Question 3

What are the required placards for recip. engines?

Answer 3

Avgas and minimum fuel grade

Question 4

What are four types of fuel tanks?

Answer 4

Integral, Rigid removable, Bladder, Surge

Question 5

Why are baffles installed in integral tanks?

Answer 5

To prevent sloshing of the fuel and fuel surging

Question 6

Which tank is formed by the aircrafts structure?

Answer 6

Integral

Question 7

What is the purpose of check/flapped valves?

Answer 7

To prevent fuel from flowing away from the boost pump

Question 8

What are surge tanks designed for?

Answer 8

To contain fuel overflow and spillage

Question 9

Drip sticks are used to measure what?

Answer 9

The amount of fuel in the tank

Question 10

Why are centrifugal pumps used?

Answer 10

To prevent vapor lock in fuel lines at high altitudes

Question 11

How does a jet pump operate?

Answer 11

Using the venturi principal
Has no moving parts

Question 12

Where is the master strainer located?

Answer 12

At the lowest point of the system

Question 13

What does an electronic fuel quantity indicator consist of? How many moving parts does it have?

Answer 13

A bridgecircuit, amplifier, indicator, and a tank unit
Has no moving parts in the tank

Question 14

What is the advantage of pressure fueling?

Answer 14

Allows all tanks to be filled From a Single point

Question 15

Where should defueling be accomplished? Which tanks should be defueled first?

Answer 15

Outside. Outboard wing tanks first

Question 16

What is a cross feed system?

Answer 16

Any tank can supply any engine

Question 17

What is the purpose of a fuel jettisoning system and how does it work?

Answer 17

To quickly lower landing weight by dumping fuel overboard

Question 18

How are fuel tanks cleaned?

Answer 18

Washed out with hot water and a detergent, then Steam cleaned

Question 19

What is used to purge fuel tanks?

Answer 19

Carbon Dioxide

Question 20

What are the four classifications of fuel leaks?

Answer 20

Stain, Seep, heavy seep, running leak

Question 21

What is Reid vapor pressure?

Answer 21

Amount of pressure required on a liquid to keep it from vaporizing

Question 22

What is the name of the fuel additive that improves performance?

Answer 22

Tetraethyl Lead (TEL)

Question 23

What is the name of the fuel additive that removes lead?

Answer 23

Ethylene Dibromide

Question 24

What has a strong swelling action on rubber hoses and parts?

Answer 24

Aeromatics

Question 25

What are aviation fuels rated with?

Answer 25

A performance number

Question 26

What should be done if the required grade fuel is not available?

Answer 26

Use the next higher grade

Question 27

What are 2 problems associated with 100LL fuel?

Answer 27

-Lead fouling of spark plugs -Hot spots which can lead to pre-ignition

Question 28

For transport category aircraft, it is required that each fuel system have at least _____% of the fuel flow under each intended operating condition and maneuver.

Answer 28

100%

Question 29

What prevents exhaustion of the tank by giving a positive indication that a change of tanks is needed?

Answer 29

Fuel Pressure Indicators

Question 30

When using fuel pressure indicators, the transmitter converts fluid pressure into what?

Answer 30

An electrical signal

Question 31

What is used to determine when there is danger of ice crystals forming in the fuel?

Answer 31

Fuel Temperature Indicator

Question 32

Metal tanks must withstand an internal test pressure of what?

Answer 32

3.5 PSI

Question 33

Tanks must have an expansion space not less than ____% of the tank capacity.

Answer 33

2%

Question 34

What type of tank must be supported by the structure and not the fuel load?

Answer 34

Bladder

Question 35

What must be maintained in the vapor space inside of the bladder tanks?

Answer 35

Positive Pressure

Question 36

Fuel tanks must **not** be installed where?

Answer 36

On the engine side of the firewall

Question 37

Integral tanks in a wing are said be what?

Answer 37

A Wet Wing

Question 38

How are bladder tanks held in place?

Answer 38

Buttons or Snaps

Question 39

Fuel systems are required to have fuel strainers and filters. TRUE or FALSE?

Answer 39

TRUE

Question 40

What are 4 general types of fuel quantity indicators?

Answer 40

-Sight glass -Mechanical -Electrical -Electronic