fuel system

Question 1

how many fuel tanks does the airplane have?

Answer 1

2 integral tanks

Question 2

where is the fuel tank temperature taken?

Answer 2

left tan

Question 3

what type of fuel pumps are in each wing?

Answer 3

primary ejector pump
ACMP
DCMP (right tank only)
3 scavenge ejector pumps

Question 4

what is the primary ejector pump

Answer 4

venturi pump with no moving parts and no electrical power used by the respective engine

powered by motive flow

Question 5

what is the purpose of the ACMP?

Answer 5

back up pump in case of primary ejector pump failure

engine start

cross feed operations

Question 6

what is the purpose of the DCMP?

Answer 6

used for APU or engine start if AC power or the ACMP is not available

Question 7

what is the purpose of the scavenge pumps?

Answer 7

maintains fuel level in the collector box

Question 8

what pump is used once an engine is started?

Answer 8

primary (main) ejector pump)

Question 9

what is the purpose of the collector box?

Answer 9

keeps the fuel pumps submerged
ensures constant fuel flow to the respective engine

Question 10

what is the surge/vent tank?

Answer 10

collects fuel during wing-down maneuvers and returns it to the main tanks once the wings are level

equalizes tank pressure with atmosphere in flight and during refueling

Question 11

can fuel be transferred from tank-to-tank or be dumped overboard?

Answer 11

no

Question 12

what happens when the crossfeed switch is selected to LOW 1?

Answer 12

crossfeed valve is opened
commands the ACMP 2 to ON to provide fuel from the right tank to both engines

Question 13

what is the only way to close the engine fuel SOV?

Answer 13

pull the associated engine fire extinguishing handle

Question 14

When will the FUEL 1/2 LO LEVEL EICAS be presented?

Answer 14

660 lbs of fuel remaining in the associated tank

Fuel low level caution (gauge indications turns yellow only) occurs at 1320 lbs. in associated tank