Fuel System Flashcards Preview

CL-65 (900) Study Guide > Fuel System > Flashcards

Flashcards in Fuel System Deck (41):
1

Where is the fuel stored?

In the two main wing tanks and one center tank

2

How are the fuel tanks normally vented?

Vented to the atmosphere via two NACA scoop vents located underneath the wing near the trailering edge between the flap segments

3

How are fuel system faults annunciated?

  • Switch lights on the overhead fuel panel
  • On the EICAS in the form of messages

4

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

 

  • Six fuel quantity probes with compensator units in each of the main tanks
  • Three probes in the center tank
  • Aircraft Attitude information from the AHRS/IRS

5

How may the fuel level be manually checked on the ground?

By means of magnetic level indicators( MLI)

6

What happens if the active channel fails on the fuel computer system?

The fuel computer is dual channe, the redundant channel will take over

7

What are the different types of Ejector Pumps?

  • Transfer Ejectors
  • Scavenge Ejectors
  • Main Ejectors

8

What type of Ejector Pump is used to move fuel from the main tanks to the collector tanks?

Scavenge Ejectors

9

What type of ejector pump is used to move fuel from the center tank to the main wing tanks?

Transfer Ejectors

10

What type of ejector transfers fuel from the collector tanks to the engines?

Main Ejectors

11

What maintains fuel symmetry between the main tanks?

Automatically controlled by the Bi-directional X flow pump

12

How are the collector tanks kept full?

Gravity feed lines and scavenge ejectors

13

What is used to back up the main ejectors?

two electric boost pumps

14

What are the electric boost pumps used for?

  • During engine starting
  • Can feed fuel to either engine from one collector tank
  • backup the main ejector pumps

15

From what source is the APU fuel feed supplied?

From the left collector tank via APU Fuel Pump

16

Where is the bulk fuel temperature taken?

Right Main Tank

17

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

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

18

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

FUEL IMBALANCE

19

What fuel system information is displayed on the EICAS Primary Page?

  • Individual tank quantities
  • Total fuel quantity
  • Fuel flow per engine

20

Where can you find the total amount of fuel used?

Fuel Synoptic Page

21

In order to take off with more than 500 lbs of fuel in the center tank, how much fuel must be in each main wing tank?

Above 4400 lbs

22

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

  • Preselection of fuel quantity desired
  • Built in test feature
  • Refuel / defuel shut-off-valves to close automatically if the maximum fuel level is reached

23

What is the flight deck indication of a high pressure fuel pump failure?

Engine flameout

24

What is the maximum fuel imbalance?

  1. 300 lbs for takeoff
  2. 800 lbs for all other phases

25

When will the fuel system automatically begin transferring fuel?

200 lbs fuel imbalance

26

When are the boost pumps automatically energized?

Low pressure from the main ejectors (if the pumps are armed)

27

Where is the high pressure fuel pump located?

N2 accessory gearbox

28

What is the minimum engine fuel temperature for takeoff?

+5c

29

What is the Minimum Bulk Fuel Temp for take-off(Jet A)?

-30c

30

What is the Minimum bulk fuel temp during flight(Jet A)?

Above -40c

31

How is engine fuel heated?

Fuel/Oil heat exchanger

32

Which Bus powers the refuel/defuel panel and refuel/defuel SOV's?

DC Emergency Bus

33

Where is the refuel/defuel panel located?

The fuselage forward of the right wing

34

Where is the single point adapter located?

Right wing root

35

What are the two methods to cross flow fuel?

  1. Powered Cross Flow (Auto or manual)
  2. Gravity Cross Flow

36

What provides fuel tank ventilation when the airplane is in a nose up attitude?

Ventilation is provided by a climb vent

37

During automatic fuel crossflow, when will the fuel transfer terminate?

When the wing that is receiving fuel is 50 lbs more than the other wing

38

How many fuel filters are installed on the CRJ?

One per engine

39

When will the EICAS fuel quantity indications be green?

When each wing tank has at least 600lbs, and the total fuel is greater than 1200lbs

40

What switches control the APU fuel feed SOV?

  • APU FIRE PUSH
  • PWR FUEL

41

What switchlight controls the engine fuel feed SOV?

Left or Right ENG FIRE PUSH