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CL-65 Study Guide > Fuel System > Flashcards

Fuel System Flashcards

1
Q

What are the fuel quantities for pressure refueling?

A

700, 900, 900EP:
Total: 19,594 lbs
Mains: 7,492 lbs
Center: 4,610 lbs

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2
Q

What are the fuel quantities for gravity refueling (900 and 900EP)?

A

Total: 14,810 lbs
Mains: 7,405 lbs
Center: N/A

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3
Q

What are the fuel quantities for gravity refueling (700)?

A

Total: 14,580 lbs
Mains: 7,290 lbs
Center: N/A

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4
Q

How is the fuel moved from the main tanks to the collector tanks?

A

Scavenge ejectors

Gravity line used as a backup

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5
Q

How is the fuel moved from the center tank to the main tanks?

A

Transfer ejectors

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6
Q

How is fuel moved from the collector tanks to the engine driven high pressure fuel pump?

A

Main ejectors

Backed up by boost pumps

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7
Q

What is the function of the electric boost pumps?

A

To provide initial fuel for engine start and to back-up the main ejectors

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8
Q

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

A

Engine flameout

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9
Q

When will the fuel system automatically begin transferring fuel?

A

200 lb fuel imbalance

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10
Q

What is the maximum fuel imbalance?

A

300 lb for takeoff

800 lbs for all other phases

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11
Q

When are the boost pump automatically energized?

A

Low pressure from the main ejectors (as long as the boost pumps are armed)

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12
Q

Where is the high pressure fuel pump located?

A

N2 accessory gearbox

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13
Q

Where is the bulk fuel temperature taken?

A

Right Main Tank

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14
Q

What is the Minimum Bulk Fuel Temperature for take-off (Jet A)?

A

-30º C

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15
Q

What is the minimum bulk fuel temperature during flight (Jet A)?

A

above -40º C

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16
Q

How is engine fuel heated?

A

Fuel/oil heat exchanger

17
Q

What is the minimum engine fuel temperature for takeoff?

A

+5º C

18
Q

What is the takeoff limitation if the center tank has more than 500 lbs of fuel?

A

Each main tank must have at least 4400 lbs of fuel

19
Q

Which Bus powers the refuel/defuel panel and refuel/defuel SOVs?

A

APU direct battery bus

20
Q

Where is the refuel/defuel panel located?

A

The fuselage forward of the right wing

21
Q

Where is the singe point adapter located?

A

Right Wing Root

22
Q

How are the fuel system faults annunciated?

A

The switch lights on the overhead panel and on EICAS in the form of messages

23
Q

What is used to provide the fuel computer with fuel quantity information?

A

6 fuel quantity probes with compensator units in each of the main tanks and 3 in the center

24
Q

What maintains fuel symmetry between the main tanks?

A

Automatically or manually controlled by the XFLOW pump

25
Q

How are the collector tanks kept full?

A

Gravity feed lines and scavenge ejectors

26
Q

What is used to back up the main ejectors?

A

2 electric boost pumps

27
Q

The electric fuel boost pumps…

A

1) are energized during engine start
2) can feed fuel to either engine from 1 collector tank
3) back up the main ejector pumps

28
Q

From what source is APU fuel feed supplied?

A

From the left collector tank via APU fuel pump

29
Q

Where is the bulk fuel temp taken?

A

Right main tank

30
Q

How is pressure refueling and suction defueling accomplished and how is it controlled?

A

Accomplished through the single point refuel/defuel adapter. Controlled from the refuel/defuel control panel

31
Q

If a fuel asymmetry condition exists between main tanks, what visual amber CAUTION message is presented on EICAS?

A

FUEL IMBALANCE

32
Q

What fuel system information is displayed on the EICAS Primary page?

A

Individual tank quantities, total fuel quantity, fuel flow per engine

33
Q

For automatic pressure refueling, what does the refuel/defuel control panel permit?

A

Preselection of the fuel quantity
Built in test feature (BITE)
Refuel/defuel SOV’s to close automatically if the maximum fuel level is reached

CL-65 Study Guide (25 decks)

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