Fuel System

Question 1

How many tanks are in each wing and what are they?

Answer 1

The fuel system comprises two integral fuel tanks, with one tank located in each wing. Each wing tank incorporates a collector tank and a surge tank. (81214-10-10 Pg 1)

Question 2

In the right wing how many fuel pumps are there and what are they?

Answer 2

Each wing fuel tank contains the following pumps:

• Ejector fuel pump .
• Wing AC electric fuel pump .
• Three scavenge ejector pumps .
• DC electric fuel pump (right tank only) .

(812 14-10-10 Pg 5)

Question 3

What is the purpose of the AC pump?

Answer 3

The wing tanks AC electric fuel pump supplies fuel to the following components:

• Onside engine during engine starts .
• Cross side engine during crossfeed operations .
• APU, when engine is not running .

It is also a backup pump in the event of ejector pump failure. (812 14-10-10 Pg 5)

Question 4

How does the Ejector Fuel Pump work?

Answer 4

The primary wing fuel pump is a venturi ejector pump with no moving parts, and is powered by the respective engine motive flow. It is a self-sustained pump and does not require electrical power to operate. (812 14-10-10 Pg 5)

Question 5

Where is the fuel temperature sensed?

Answer 5

The digital information indicates the fuel temperature measured in the left fuel tank. (B12 14-10-05 Pg 3)

Question 6

When selecting the cross feed valve to LOW 1, what happens in the system?

Answer 6

Setting the crossfeed selector knob to LOW 1 position opens the crossfeed valve and activates the AC PUMP 2, feeding both engines from wing tank 2. (B12 14-10-10 Pg 6)

Question 7

What is the primary purpose of the DC fuel pump?

Answer 7

Provides pressurized fuel for normal APU operation and engine start, when AC power or the AC fuel pump is not available. (B12 14-10-10 Pg 5)

Question 8

If the total fuel quantity indication is replaced by amber dashes, what does it mean?

Answer 8

AMBER DASHED: invalid information. (B12 14-10-05 Pg 7)

Question 9

During an electrical emergency and the RAT in use, which fuel pump will be powered?

Answer 9

The right wing AC electric fuel pump (AC PUMP 2) is powered by AC ESS BUS and the DC electric fuel pump is powered by the DC ESS BUS 2. (B1214-10-10 Pg 5)

Question 10

How is the “total fuel used” reset to zero?

Answer 10

The FUEL USED indication is automatically reset by the FMS upon the first engine start. (MAU Load 21.2 and on) (B12 14-10-10 Pg 3)

Question 11

Where is the fuel stored? What does each wing tank incorporate?

Answer 11

2 integral wing tanks

• A collector tank
• Surge tank

Question 12

How many magnetic level indicators are there per wing?

Answer 12

3

Question 13

What are the fuel pumps are in each wing?

Answer 13

• Ejector Fuel pump
• Wing AC electric fuel pump
• Three scavenge ejector pumps
• DC electric fuel pump (right tank only)

Question 14

What does the wing AC electric fuel pump supply fuel to?

Answer 14

• Onside engine during engine starts
• Cross side engine during crossfeed operations
• APU, when engine is not running

Question 15

Left wing AC electric fuel pump is powered by which BUS?

Right wing AC electric fuel pump is powered by which bus?

Answer 15

Left wing - AC BUS 1

Right wing - AC ESS BUS

Question 16

How many scavenge pumps are there and what do they do?

Answer 16

3 and maintain the fuel level in the collector tank, ensuring a constant flow of fuel to the engine.

Question 17

What does the right wing DC Fuel pump do?

Answer 17

• Provide fuel for normal APU operation and engine start when AC power not available

Question 18

Setting the crossfeed valve to LOW 1 does what?

Answer 18

Opens the crossfeed valve and activates the AC pump 2, feeding both engines from wing tank 2.

Question 19

What closes the engine fuel shutoff valve?

Answer 19

Actuation of the fire handle

Question 20

When does the fuel low-level warning message activate?

Answer 20

When there is 400kg in the associated wing tank

Question 21

Engine flameout due to fuel starvation may occur if the airplane is subjected to attitudes greater than?

Answer 21

15 deg nose up or down

Question 22

The fuel quantity indicator system accuracy is specified as?

Answer 22

+/- 1% of maximum capacity during normal ground attitudes

+/- 2% of maximum capacity during normal flight attitudes

Question 23

When is the FUEL USED indication reset?

Answer 23

Reset by the FMS upon first engine start

Question 24

How many water drains per tank?

Answer 24

1

Question 25

Which fuel pump gets its power supply from AC-ESS BUS?

Answer 25

Auxillary AC2 Pump

Question 26

By what means can fuel be transferred from the left tank to the right tank?

Answer 26

Select XFEED rotary switch on the overhead fuel panel to LOW 2

Question 27

What fuel pumps can be found in the wings?

Answer 27

1 ejector fuel pump, 1 AC pump, 3 scavenge pump, 1 DC pump (right wing only)

Question 28

How many magnetic level indicators (Dripsticks) are fitted to the EMB190?

Answer 28

6

Question 29

Which fuel pump(s) provide the primary fuel feed to the engines?

Answer 29

Venturi Ejector pumps

Question 30

How does an ejector fuel pump work?

Answer 30

Venturi (jet pump)

Question 31

In which tank is the fuel temperature sensed?

Answer 31

Tank 1 (Left)

Question 32

What lateral fuel imbalance will cause a FUEL IMBALANCE caution message to be generated, and when will it be replaced with a FUEL EQUAL - XFEED OPEN advisory message?

Answer 32

360kg and replaced if the difference is reduced to 45kg

Question 33

Which fuel pumps are located in the right wing collector box?

Answer 33

Primary Ejector pump, Auxiliary AC2 pump and the DC Fuel pump