Week 14 (Fuel Systems)

Question 1

primary function of the FUEL SYSTEM

Answer 1

to provide theengine with the correct (metered) fuel for all operating conditions

Question 2

automatically adjusts fuel flow to compensate for changes in ambient temperatures and pressures for a selected thrust setting

Answer 2

Fuel Control System

Question 3

What is the purpose of the Wing Shut-off Valve(aka Spar valve)?

Answer 3

To shutoff the fuel at the wing tank source.

Question 4

__ ___ is used to heat the cold-soaked fuel delivered from the tanks to prevent ice formations entering the FCU

Answer 4

Fuel Heater

Question 5

three most common types of Fuel filters

Answer 5

Wafer Screen Plain Mesh Micron

Question 6

What type of filter element consists of layers of metal screen discs and is able to withstand high pressures?

Answer 6

Wafer Screen

Question 7

What type of filter is made up of a wire screen, often formed into a cone and used in areas where filtering is not as critical?

Answer 7

Plain mesh

Question 8

What type of filter is named after the particle unit of measure for which the filter is rated?

Answer 8

Micron

Question 9

___ calculates and delivers metered fuel flow to the fuel nozzles to support combustion for all possible operating requirements of the engine

Answer 9

Fuel Control Unit (FCU)

Question 10

the 2 primary FCU tasks

Answer 10

Fuel Computing and Metering

Question 11

4 types of FCU

Answer 11

1) Hydro-Mechanical 2) Hydro- Pneumatic 3) Supervisory E.E.C. 4) Electronic (F.A.D.E.C)

Question 12

this type of FCU uses a flyweight governor, in combination with various sensors (ie: compressor discharge pressure, combustion chamber pressure, exhaust gas pressure) to meter fuel flow into the combustion chamber.

Answer 12

Hydro-Mechanical

Question 13

This FCU uses AIR and FUEL pressures to meter fuel for combustion

Answer 13

Hydro-Pneumatic

Question 14

This FCU is a Combination of FADEC technology and Hydro-mechanical System

Answer 14

Supervisory EEC (electronic engine control)

Question 15

What does FADEC stands for?

Answer 15

Full Authority Digital Engine Control

Question 16

indicates an engine’s fuel use in real time and provide a visual display to the Flight Deck at the Fuel Flow indicator.

Answer 16

Fuel Flow Transimitter

Question 17

purpose of fuel nozzles

Answer 17

to atomize the fuel to provide efficient combustion

Question 18

2 primary designs of fuel nozzles

Answer 18

Simplex and Duplex

Question 19

the ____ ____ delivers fuel to the nozzles

Answer 19

Fuel Manifold

Question 20

are installed in the fuel delivery system to ensure that all fuel is removed after engine shutdown

Answer 20

Drain Valves

Question 21

more viscous than avgas and as a result acts as a lubricant for the pumps and fuel control components

Answer 21

Jet Fuel

Question 22

What is the purpose of fuel filter diff pressure bypass switch?

Answer 22

Switch closes when filter is clogged to illuminate a Warning Light in flight deck

Question 23

You are inspecting an Oil filter and see a Red pop out indicator, what does this indicate?

Answer 23

Fuel Filter is clogged

Question 24

What would you typically see on a Jet A fuel pipe?

Answer 24

Black Decal with one black strip