Engine Fuel Systems

Question 1

The color of avgas 80 is?

Answer 1

Red

Question 2

The color of avgas 100 is?

Answer 2

Green

Question 3

The color of avgas 100LL

Answer 3

Blue

Question 4

Octane

Answer 4

a number that is used to measure the antiknock properties of a liquid motor fuel (such as gasoline) with a higher number indicating a smaller likelihood of knocking

Question 5

Which engine Driven fuel pump is a positive (constant) displacement pump?

Answer 5

All engine driven fuel pumps.

Question 6

The color of Jet A is?

Answer 6

Colorless or a straw color.

Question 7

The color of jet A-1 is?

Answer 7

Colorless or a straw color.

Question 8

The color of jet b is?

Answer 8

Colorless or a straw color.

Question 9

The two main types of aviation fuel are?

Answer 9

Avgas and Jet fuel.

Question 10

What are the three main grades of avgas?

Answer 10

Avgas 80
Avgas 100
Avgas 100LL

Question 11

The three main Grades of jet fuel are?

Answer 11

Jet A
Jet A-1
Jet B

Question 12

All fuel sources should avoid what?

Answer 12

All heat sources, sharp bends, rises, and falls.

Question 13

Fuel lines should be routed ___ electrical wiring.

Answer 13

Below

Question 14

___ must have 150% in all normal flight attitudes and for engine fuel consumptions at take-off.

Answer 14

Gravity Fed Fuel Systems.

Question 15

___ must have 125% capabilities in all normal flight altitudes and for fuel consumptions at take-off.

Answer 15

Pressure Fed Fuel Systems.

Question 16

All means of rapidly shutting off fuel and these valves must be located ___ the firewall.

Answer 16

Behind

Question 17

(True or False)

The fuel shut off can be located on the side of the side of the engine.

Answer 17

False, it must be located behind the firewall.

Question 18

(True or False)

Fuel tanks don’t have to be vented if there is a pressure release in the fuel pump.

Answer 18

False, Fuel tanks must be vented to prevent negative pressure during fuel draws.

Question 19

All systems must have a ____ drain and/or screen.

Answer 19

low point

Question 20

(True or False)

There must be one engine driven pump for each engine and a means for bypass incase of failure.

Answer 20

True

Question 21

The major categories of aircraft fuel systems are?

Answer 21

Gravity Feed and Pressure Feed.

Question 22

A sealed portion of the aircraft’s wing, used to store fuel.

Answer 22

Wet Wing or integral.

Question 23

Fuel tank made of flexible material placed into the aircraft. (offers the best in-flight stability.)

Answer 23

Fuel Bladder

Question 24

(Utilized by larger aircraft) Multiple cells, all interconnected to allow for fuel transfers and cross feeding engines.

Answer 24

Multiple Cell Fuel tanks. (Integral)

Question 25

(True or False) | Main filters are typically placed at low points in the fuel system.

Answer 25

True, They are typically placed at low points to collect as many contaminates as possible.

Question 26

Three types of of strainers/filters differing by their filtering method.

Answer 26

Surface Filtration Edge Filtration Cellulose Fiber Filtration

Question 27

Engine Driven pumps are typically _____.

Answer 27

Rotary Vane or Spur Gear type pumps.

Question 28

Bypass valves allow for fuel flow from the ____.

Answer 28

auxiliary electric pumps

Question 29

(True or False) | Pumps are not required for fuel injected turbine engines.

Answer 29

False, fuel pumps are required for fuel injected engines.

Question 30

Pumps that allow of liquid to move through vanes using rpm to increase pressure.

Answer 30

Rotary Vane Pumps.

Question 31

pumps that move a quantity of liquid using spur gears.

Answer 31

Spur Gear Pump

Question 32

Engine Driven pumps are usually of which two types?

Answer 32

Rotary Vane and Spur Gear

Question 33

Auxiliary pumps are usually of which three major types?

Answer 33

Wobble, Pulsating Electric, and Centrifugal.

Question 34

(True or False) | Auxiliary pumps are constant displacement pumps.

Answer 34

False, auxiliary pumps are VARIABLE displacement pumps.

Question 35

This pump is usually driven at a constant speed and moves fuel using an impeller.

Answer 35

Centrifugal pump.

Question 36

This pump is typically mounted near or own the firewall. usually uses a solenoid and a plunger to move fuel.

Answer 36

Pulsating electric pump.

Question 37

This pump is used to ensure all fuel in the tank is removed. uses a venturis located in low laying spots.

Answer 37

Transfer Ejector pump, or Jet pump.

Question 38

Fuel heaters in a jet engine heat fuel by?

Answer 38

Using oil or bleed air to heat fuel.