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CL-65 Study Guide > Fuel > Flashcards

Fuel Flashcards

1
Q

How can the airplane be refueled?

A
  • single point adapter

- overwing gravity refueling

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2
Q

What does the fuel control computer do?

A
  • controls auto refueling
  • powered crossflow
  • fuel transfer
  • measures fuel quantity/temperature
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3
Q

What provides venting of the tanks?

A

2 under-wing NACA vent scoops

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4
Q

Where are the collector tanks located?

A

Inside the center tank

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5
Q

Which is lower, wing tanks or collector tanks?

A

Collector tanks

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6
Q

How many pressure relief valves?

A

3 (1 under each wing, and 1 under the fuselage for the center tank)

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7
Q

What psi will the spring-loaded pressure relief valves actuate?

A

> 5 psi

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8
Q

How many fuel distribution systems?

A

2

  • engine fuel feed system
  • APU fuel feed system
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9
Q

What force operates the ejectors?

A

Motive flow

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10
Q

Are the boost pumps AC or DC?

A

DC

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11
Q

Where does the APU fuel feed system get its fuel?

A

From the left collector tank

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12
Q

Where does the fuel system computer get temperature readings from?

A

The right tank & just prior to entering the engines

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13
Q

What is the order of transfer ejectors as the fuel flows?

A

transfer ejectors
scavenge ejectors
main ejectors

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14
Q

What starts the process of motive flow?

A

Engine driven fuel pumps

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15
Q

Do the 2 boost pumps always turn on together?

A

Yes

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16
Q

What is the min fuel feed temperature?

A

5 C

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17
Q

What heats fuel before entering the engine?

Where is it located?

A

Fuel/oil heat exchanger.

On the engine.

18
Q

What will close the Engine Fuel Shutoff Valve if pressed?

A

ENGINE FIRE PUSH switchlight

19
Q

What will actuate the APU Fuel Shutoff Valve?

A

APU FIRE PUSH switchlight

PWR/FUEL switchlight

20
Q

What imbalance of fuel will cause the auto xflow to activate?

A

> 200 lbs between tanks

21
Q

When will the auto xflow stop?

A

When the low tank is +50 lbs of the other tank

22
Q

When will the FUEL IMBALANCE caution message appear?

A

> 800 lbs between wing tanks

23
Q

What is the max allowable fuel imbalance for takeoff?

A

300 lbs between wing tanks

24
Q

When will the fuel system computer auto transfer fuel from the center to wing tanks?

A

When the wing tank reaches 94%

25
Q

Where is the refuel/defuel panel located?

A

On the right side of the fuselage, forward of the wing root

26
Q

What will show in the flight deck when the POWER switch on the refuel/defuel control panel is selected on?

A

AUTO XFLOW INHIB status message

27
Q

Takeoff with fuel >500 lbs in the center tank not permitted unless each wing tank has >___ lbs?

A

4400

28
Q

MLI

A

Magnetic Level Indicators

29
Q

What provides a mechanical method of measuring fuel quantity?
How many are there?

A

MLI’s

5

30
Q

What is the min fuel temp for TO?

What is the min fuel temp for flight?

A

-30 C

> -40 C

31
Q

When does total fuel indication turn amber?
Center tank?
L/R tank?

A

800 …or <=600 lbs

32
Q

Where are the engine driven fuel pumps located

A

N2 accessory gear box

33
Q

How many motive flow ejector pumps?

A

8

  • 2 transfer
  • 4 scavenge
  • 2 main
34
Q

Will the APU continue to run if its pump fails?

A

Yes

35
Q

How is the APU SOV closed if a fire is detected?

A
  • FIRE PUSH switchlight
    • Automatically on ground
    • Manually airborne
36
Q

How many capacitance probes?

A

17

  • 6 in each wing tank
  • 3 in center tank
  • 1 in each collector tank
37
Q

What do FAIL switchlights usually mean?

A

That the valve is not in the COMMANDED position

38
Q

When is the Fuel Feed Check Valve Test done?

A

1st flight of day before 2nd engine start

to verify fuel system check valve operation

39
Q

What is the backup for moving fuel from the wings to the collector tanks?

A

Gravity lines

40
Q

What is the flight deck indication of a high pressure fuel pump failure?

A

Engine flameout

41
Q

Which bus powers the refuel/defuel panel & refuel defuel SOV’s?

A

APU Battery Direct Bus

CL-65 Study Guide (18 decks)

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