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ERJ Systems > Fuel > Flashcards

Fuel Flashcards

1
Q

What is the primary pump used to transfer fuel from the tank to the engine?

A

Main ejector pump

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2
Q

Can a fueler determine the amount in the plane if it is unpowered?

A

Yes because the fuel panel is connected to the hot battery bus.

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3
Q

What happens when the fuel cross feed selector is set to low 1?

A

AC fuel pump 2 is turned

Both engines are supplied fuel from high tank 2

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4
Q

How many tanks does the ERJ 175 have?

A

2 each divided into a collector, main and surge tank

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5
Q

What position should you set the cross feed to when preforming a cross feed?

A

Low side

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6
Q

What are the different fuel pumps?

A

AC pump
DC pump
Main Ejector pump

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7
Q

Can you takeoff or land with the fuel selector set to crossfeed?

A

No

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8
Q

How can you crossfeed fuel into the opposite tank?

A

Set the selector to low tank
This activates the high side AC pump
The extra fuel flow will be pumped into the low tank

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9
Q

What are the indications of a fuel leak?

A 
Fuel imbalances develops
Excessive fuel flow to one engine
Fuel in one take decreases at an abnormal rate
Fuel smell
Fuel spraying from wing
Unexpected difference from release
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10
Q

Can you see the low fuel light if you have more than emergency fuel on board?

A

Yes

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11
Q

Can we directly transfer fuel when crossfeeding?

A

No

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12
Q

How do we transfer fuel between tanks?

A

Select the low tank with the fuel crossfeed. This turns
on AC pump on the high side to push more fuel to the
low side + burning both engine from the same tank
(excess fuel returned to low tank)

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13
Q

Can we takeoff and land with crossfeed on?

A

No

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14
Q

What is the fuel imbalance limitation?

A

794 lbs

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15
Q

When does the fuel imbalance EICAS message appear?

A

800 lbs

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16
Q

When will the fuel imbalance message turn off?

A

When there is less than a 100 lb imbalance

17
Q

How many fuel tanks are on the airplane?

A

2

18
Q

How are the fuel tanks divided up?

A

Collector, surge, and main tank

19
Q

What is the purpose of the collector tank?

A

Feed the engine with fuel

20
Q

What is the purpose of the surge tank?

A

To catch fuel during venting and sloshing during maneuvering

21
Q

What is the purpose of the main tank?

A

Store fuel

22
Q

What is the main pump to send fuel to the engine?

A

Main ejector pump

23
Q

What is the back up fuel pump for the main ejector pump?

A

AC fuel pump

24
Q

What is the back up for the engine driven fuel pump?

A

There is no backup for the engine driven fuel pump

25
Q

What is minimum fuel?

A

45 minutes / 2250 lbs in a clean configuration at green dot at 1500 AGL

26
Q

What is emergency fuel?

A

30 minutes / 1500 lbs in a clean configuration at green dot at 1500 AGL

27
Q

When do we use the DC fuel pump?

A

During an electrical emergency before the RAT is deployed
It is used to provide fuel to start the APU
(RAT is deployed AC pump takes over)
Start engine 2 if there is no AC power available but there is an air cart

28
Q

What does auto position on DC pump do?

A

Allows the pump to turn on when there is no AC power.

29
Q

When does AC pump turn on in AUTO mode?

A

Failure of main ejector pumps, during engine start, during XFEED, and starting the APU

30
Q

What AC pump do we get when the RAT comes out?

A

AC pump 2 (and DC pump prior to the RAT being operational)

31
Q

Can we refuel over the wing?

A

Yes

32
Q

How do we verify the caps are back on if the airplane is fueled over the wing?

A

Check the caps from the cabin window

33
Q

Do we need the airplane to be powered to fuel the airplane?

A

No

34
Q

What stops the single point refuel from draining the BATT?

A

Closing the panel opens the circuit

ERJ Systems (29 decks)

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