Fuel

Question 0

How are the fuel tanks normally vented

Answer 0

The tanks are vented to atmosphere by 2 NACA scoops vents

Question 1

Where is the aircraft fuel stored

Answer 1

In the two main wing tanks and one center collector tank

Question 2

How are fuel system faults annunciated

Answer 2

Both a and b are correct: switch lights on the overhead fuel panel & on EICAS in the form of messages

Question 3

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

Answer 3

Both a and b: six fuel quantity probes with compensator units in each of the main tanks & three probes in the center tank

Question 4

How may the fuel level be manually checked on the ground

Answer 4

By means of magnetic level indicators

Question 5

What type of ejector pumps are used to move fuel from main tanks to the collector tanks

Answer 5

Scavenge ejectors

Question 6

What maintains fuel symmetry between the main tanks

Answer 6

Automatically controlled by the bi-directional x flow pump

Question 7

How are the center collector tanks kept full

Answer 7

Gravity feed lines and scavenge ejectors

Question 8

What is used to back up the main ejectors

Answer 8

Two electric boost pumps

Question 9

The electric fuel boost pumps

Answer 9

All of the above: are energized during engine start, can feed fuel to either engine from one collector tank, back up the main ejector pumps

Question 10

From what source is the APU fuel feed supplied

Answer 10

From left collector tank via APU fuel pump

Question 11

Where is bulk fuel temperature taken

Answer 11

Right main wing tank

Question 12

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

Answer 12

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

Question 13

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

Answer 13

FUEL IMBALANCE

Question 14

What fuel system information is displayed on the EICAS primary page

Answer 14

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

Question 15

How many magnetic level indicators are there and where are they located

Answer 15

5. There are two under each main wing tank, and one under the center collector tank

Question 16

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

Answer 16

All of the above: pre selection of fuel quantity desired, built in test BITE feature, refuel/ defuel shut off valves to close automatically if the maximum fuel level is reached

Question 17

What is the purpose of the fuel drain valves that are installed at the lowest point of each tank

Answer 17

To permit gravity defueling