Fuel System Flashcards

1
Q

What are the fuel quantities for Gravity refueling

A

Total: 14,810 lbs CRJ-700 Total: 14,580 lbs
Mains: 7,405 lbs Mains: 7,290 lbs
Center: N/A

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2
Q

How is the fuel moved from the center tank to the mains

A

Transfer ejectors

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3
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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4
Q

How is the 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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5
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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6
Q

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

A

Engine flameout

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7
Q

What is the maximum fuel imbalance

A

300 lbs for takeoff, 800 lbs for all other phases

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8
Q

When will the fuel system automatically begin transferring fuel

A

200 lb fuel imbalance

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9
Q

When are the boost pumps automatically energized

A

Low pressure from the main ejectors (if the pumps are armed)

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10
Q

Where is the high pressure fuel pump located

A

N2 accessory gearbox

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11
Q

Where is bulk fuel temperature taken

A

Right main tank

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12
Q

What is the minimum engine bulk fuel temp for takeoff jet-A

A

-30c

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13
Q

What is the minimum bulk fuel temp during flight jet -A

A

Above -40c

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14
Q

How is engine fuel heated

A

Fuel/oil heat exchanger

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15
Q

What is the minimum engine fuel temperature for takeoff

A

+5c

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16
Q

What is the takeoff limitation if the center tank has > 500 lbs of fuel

A

Each main tank must have > 4400 lbs

17
Q

Which bus powers the refuel/defuel panel and refuel/defuel SOVs

A

APU battery direct bus

18
Q

Where is the refuel/defuel panel located

A

The fuselage forward of right wing

19
Q

Where is the single point adapter located

A

Right wing root

20
Q

What are the fuel quantities for pressure refueling

A

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

21
Q

Over pressure relieve valve opens at what pressure?

A

Over 5 PSI

22
Q

How many fuel probes are their to detect fuel level?

A

17 total
6 in each main tank
3 in the center tank
1 in each collector tank