Airframes fueling systems

Question 1

What are the colors of Avgas 80/87 and 100/30 repsectively?

Answer 1

80/87: Red

100/30 Green

Question 2

What are the colors of avgas 115/145 and 100LL respectively?

Answer 2

115/145 Purple

100LL Blue

Question 3

80/87 and 115/145 are no longer available today. T/F?

Answer 3

True

Question 4

What is the most common grade of avgas in use today?

Answer 4

100LL

Question 5

What is the color of unleaded AVGAS 82UL?

Answer 5

Purple

Question 6

What is the color of unleaded GAMI G100UL?

Answer 6

Yellow

Question 7

Mogas is primarily used as car gas. What are the conditions that may allow it to be used in an ordinary aircraft engine?

Answer 7

Must be unleaded and the engine must be approved (STC)

Question 8

What are the three major aviation turbine fuel ratings?

Answer 8

-A-1 (Low temp)
-B (JP-4)
-A (JP-5)

Question 9

It is important that aviation fuel be free of any such impurities as what?

Answer 9

Dirt, water, acids or alkalis

Question 10

___________ _______in the fuel system of an engine constitutes a serious problem.

Answer 10

Excessive water in the fuel system

Question 11

A small amount of water will pass through the system and carburetor jets without radically affecting engine performance, but any appreciable amount of water in the system will do what?

Answer 11

Stop the flow of fuel through the metering jets leading to failure

Question 12

If microbial growth isn’t properly controlled by frequent removal of free water, the growth of these organisms can become extensive and lead to what?

Answer 12

Can lead to the development of scum which can lead to corrosion as it serves as an electrolyte

Question 13

What does the jet fuel additive “Prist” combat?

Answer 13

Icing and microbial growth

Question 14

What are the basic functions that all fuel systems must provide?

Answer 14

-Store fuel
-Deliver correct amount of fuel at the correct pressure
-Deliver CLEAN fuel
-Have components designed to deliver all the usable fuel to the engines
-Fuel quantity indication

Question 15

What are the three methods of storing fuel on an aircraft?

Answer 15

-Fuel tanks
-Fuel bladders
-Integral fuel tanks (Wet wings)

Question 16

Fuel tanks can be made from formed aluminum or composite materials they are usually installed where and require what?

Answer 16

They are typically installed in special mountings within the structure and require large openings to install which can affect the way the area surrounding it must be designed

Question 17

Bladder fuel cells can be fitted into what and why are they called collapsible?

Answer 17

They can be fitted into irregular shapes and areas and are called collapsible as they sometimes require they be rolled up or folded for installation

Question 18

Why are integral fuel tanks referred to as wet wings and what is the most difficult element of this design?

Answer 18

They use the existing structure and saves weight. They can be found in wings, stabs, or the fuselage. They are hard to seal 100% against leaks

Question 19

To deliver the correct amount of fuel at the correct pressure, what do fuel vents do and what must fuel lines be?

Answer 19

Fuel vents allow air to replace the volume of fuel that leaves the tank to maintain fuel flow. Fuel lines must be made of the adequate size and material

Question 20

To deliver clean fuel, numerous fuel ______ and ________ employed between tank and engine to remove sediment and/or water

Answer 20

Fuel filters and strainers are employed between the tank and engine

Question 21

All engines must have components situated and designed to deliver all the usable fuel to all engines. What are three components?

Answer 21

Selector valves to choose which tank feeds an engine, cross feed valves to to feed tanks and engines on opposite sides, and shut-off valves to shut engines down in the case of a fire

Question 22

Fuel quantity indicators are required and must be visible for what reasons?

Answer 22

Must be visible to the pilot and for all fuel tanks that feed into the engine. provisions must be made on the ground to determine fuel quantity on the ground

Question 23

_____________ are devices used
to provide a fuel quantity indication for pre flight inspection.

Answer 23

A drip guage

Question 24

What are some fueling safety precautions that must be taken when refueling?

Answer 24

-Ground the aircraft and the truck
-Bond the aircraft and the truck
-Bond the fuel nozzle and the aircraft together before opening the cap
-Always have fire protection at ready

Question 25

What are other safe practices involved when refueling?

Answer 25

-Refuel and defuel outside to dissipate fumes
-NO SMOKING
-Use filters for fueling from drums
-Avoid skin contact with fuel
-Wear appropriate PPE