Turbine Systems

Question 1

When adjusting your FCU, what will be your final direction to turn?

Answer 1

Increase direction

Question 2

An aircraft should be facing into the wind when trimming an engine. However, if the velocity of the wind blowing into the intake is excessive, it is likely to cause a…

Answer 2

False high compression and turbine discharge pressure

Question 3

The type of oil pumps most commonly used on turbine engines are classified as what?

Answer 3

Positive displacement

Question 4

After making a welded repair to a pressurized-type turbine engine oil tank, the tank should be pressure checked to…

Answer 4

5psi above normal pressure

Question 5

Anti-ice air commonly comes from the turbine section? (True or False)

Answer 5

False

Question 6

What does ACC stand for?

Answer 6

Active Clearance Control

Question 7

Two most common types of exhaust noise suppression are…

Answer 7

Corrugated perimeter
And
Tube type

Question 8

Operating thrust reversers at what speed can cause FOD?

Answer 8

Slow speed

Question 9

What happens to Static Pressure of supersonic exhaust gases through a divergent duct?

Answer 9

Pressure decreases and velocity increases

Question 10

What are the most common types of Jet Fuel?

Answer 10

Jet A & Jet A1

Question 11

Which filter has the highest degree of filtering: Scavenge, Low pressure, High pressure…

Answer 11

High pressure

Question 12

What causes the fuel divider valve to open?

Answer 12

Fuel pressure

Question 13

In a supervisory electronic engine control (EEC) system, when there’s any fault in the EEC what will it do?

Answer 13

It reverts to hydromechanical

Question 14

What are the two principle sections of the Fuel Control Unit (FCU)?

Answer 14

Computing and Metering

Question 15

What will the oil do when the engine is cold in reference to the fuel oil cooler?

Answer 15

It will bypass the cooler

Question 16

What is the primary purpose of the fuel/oil cooler?

Answer 16

To cool the oil

Question 17

On a test stand, what type of inlet is used on a turbine engine?

Answer 17

Bellmouth

Question 18

In axial flow compressor, bleed air is used to cool the inlet guide vanes… (True or False)

Answer 18

False

Question 19

What are the insulating blankets around the hot section made out of?

Answer 19

Aluminum, Fiberglass, or Stainless steel

Question 20

Is rearward thrust equal to forward thrust?

Answer 20

No (35-50%)

Question 21

What is the purpose of lining the inlet of turbo fan with honeycomb?

Answer 21

Noise suppression

Question 22

Are the generators on aircraft and APU interchangeable?

Answer 22

Yes

Question 23

What in fuel allows microbial growth?

Answer 23

Water

Question 24

What is the purpose of the fuel flow divider in a turbine engine duplex fuel nozzle?

Answer 24

Primary and secondary fuel flow

Question 25

What do boost pumps in a fuel system do?

Answer 25

Primes engine driven fuel pump

Question 26

What is not a variable of the FCU?

Answer 26

Humidity

Question 27

When the throttle lever increases thrust, what does the fuel flow do?

Answer 27

Increases

Question 28

Why is it important to service oil within 30 minutes of shut down?

Answer 28

To prevent over filling

Question 29

What is the purpose of the dwell chamber?

Answer 29

To separate out the oil

Question 30

What do the blow-in doors do?

Answer 30

Allow more air in the inlet

Question 31

Where is the oil cooler located in reference to a “hot tank”?

Answer 31

Pressure line

Question 32

Two most common sources of power for thrust reversers are?

Answer 32

Pneumatic and Hydraulic

Question 33

Which has more heat energy, Kerosene or AVGAS?

Answer 33

Kerosene

Question 34

What are the perimeters during engine trim settings?

Answer 34

Idle and max power

Question 35

When an emergency alternative fuel is used, what should be adjusted?

Answer 35

Specific gravity

Question 36

What does the fuel/oil cooler do in reference to **fuel**?

Answer 36

Warms fuel

Question 37

The purpose of an engine/inlet anti-ice system is primary to…

Answer 37

Prevent the formation of ice

Question 38

Aircraft uses ram air pressure in flight to cool engines internals around cowling, how is this done on the ground?

Answer 38

Low pressure air around the exhaust (Cowl flaps)

Question 39

What are the most common types of thrust reversers?

Answer 39

Mechanical and Aerodynamic

Question 40

What does the fuel tank boost pump do in reference to engine driven pump?

Answer 40

Primes engine driven pump

Question 41

What is the unit that lies at the heart of the EEC?

Answer 41

Hydromechanical fuel controller

Question 42

Oil pumped to main bearing is used for…

Answer 42

Cooling and lubrication

Question 43

Fix orifice nozzles used in turbine engine lube systems do what?

Answer 43

Send right amount of oil to each bearing

Question 44

What does the pneumatic system run off of?

Answer 44

Bleed air