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Crj 900 > Fuel > Flashcards

Fuel Flashcards

0
Q

Backup to scavenge pumps?

A

Gravity flapper valves

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1
Q

Left fuel boost pump… What bus?

A

Dc batt bus

Therefore left eng start if battery start

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2
Q

Backup to main ejectors?

A

Fuel pumps

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3
Q

Qty MLI’s?

A

Left wing…2
Right wng..2
Ctr ……….1

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4
Q

Fuel temp sensor located?

A

Right wing

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5
Q

Scavenge ejector?

A

Wing to collector tank

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6
Q

Main ejector?

A

Collector to engine

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7
Q

Transfer ejector?

A

Center to wing

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8
Q

Apu fuel pump location?

A

Left collectot tank

If failure of pump?

APU has suction feed capability

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9
Q

What provides fuel to respective side engine?

A

Main ejectors

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10
Q

When is fuel transferred

Center to wing?

A

When wing is less than 93%

Transfer ejector opens

Closes when 97%

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11
Q

Bulk fuel temp read from?

A

Rt wing tank

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12
Q

How many scavenge ejectors/ tank

A

2

Only 1 shown on synop

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13
Q

NACA scoops?

A

Vents tanks to atmosphere

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14
Q

Fuel transfer is from_____to______

Provided by_____?

A

Fuel”transfer”is from center to wing

By transfer ejectors

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15
Q

Powered crossflow?

A

Wing tank 200 low

Until 50 over

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16
Q

What’s automatically controls refueling powered fuel crossflow and fuel transfer

A

FQFC

fuel quantity gauging computer

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17
Q

What calculates fuel quantity in each tank

A

Fuel quantity gauging computer(FQGC)

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18
Q

How many fuel probes?

A

Six probes in each tank

One probe in each collector tank

Three probes in the center tank

19
Q

Fuel temperature is continuously monitored by a sensor installed in the?

A

Right wing tank

20
Q

Where are the collector tanks located?

A

Two collector Tank’s are located in the forward section of the center wing tank

21
Q

Capacity of collector tank?

A

10 gallons

22
Q

Function of the NACA scoops?

A

Vents the tanks to the atmosphere to prevent pressure buildup caused by refueling

Ram air slightly pressures the wing tanks Inflight

23
Q

What supplies fuel to the collector tanks?

A

Scavenge ejectors

24
Q

What supplies fuel to the engines?

A

Main ejectors

25
Q

In the event of an APU pump failure?

A

A negative gravity relief valve allows fuel

The valve opens when a negative gravity condition exists or when the APU pump fails

26
Q

How is the fuel heated?

A

Via the fuel oil heat exchanger

Hot engine oil heats the fuel

27
Q

Fuel imbalance?

A

300 pounds on takeoff

800 pounds other phases

28
Q

Powered crossflow?

A

200 pounds low to 50 pounds over

29
Q

How many MLI’s?

A

Two in each wing tank

One in the center tank

30
Q

Pressing in the fuel pump switches?

A

Arm the fuel pumps

31
Q

Center tank fuel limitation?

A

4400 4400
500

If more than 500 in the. Center tank we must have more than 4400 in the Wing tanks

32
Q

Below what engine fuel temperature is take off prohibited?

A

+5c

33
Q

The engine fuel SOV is controlled by?

A

The ENG FIRE PUSH button

34
Q

The APU fuel SOVis controlled by?

A

PWR FUEL SWITCH

APU FIRE PUSH

35
Q

Which fuel boost pump is operational during a battery start?

A

The left boost pump

36
Q

Are there any EICAS messages When there is fuel transfer from the center to the wing tanks?

A

No

37
Q

What is reqd ( elec system)for pressure fueling?

A

DC PWR

38
Q

Fuel pumps operate when?

A

Low fuel pressure

Engine starts

39
Q

Where are the collector tanks located

A

In the center tank at a point that is lower than the left or right wing tanks

40
Q

The Apu pump take fuel from where for the APU

A

From the left collector tank

41
Q

What supplies fuel to the engine’s when a main ejector pressure is low

A

DC electric boost pumps

42
Q

The fuel system computer controls the operations of the fuel system

A

..

43
Q

Apu and engine sovs are electric

A

..

44
Q

Anytime the crosstie closes?

A

All ties close

45
Q

QRH??Priority of multiple messages?

A

Electrical

Hydraulics

Pneumatics

Other

Crj 900 (45 decks)

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