Fuel System

Question 1

Fuel distribution in A/C?

Answer 1

70% fuselage and 30% wings

Question 2

Total Capacity (Internally)

Answer 2

2000kg

Question 3

Fuel Control Panel located where?

Answer 3

Left side of the A/C nose

Question 4

How many internal tanks?

Answer 4

4

Question 5

What are the internal tanks?

Answer 5

Collector, Main, 2x Wing

Question 6

Capacity of collector tank

Answer 6

210kg

Question 7

Capacity of main tank

Answer 7

1230kg

Question 8

Capacity of each wing tank

Answer 8

280kg

Question 9

Where are the fuel pumps housed?

Answer 9

Collector tank

Question 10

How is the collector tank kept full?

Answer 10

2 transfer jet pumps from the main tank

Question 11

Where is the tube in the collector tank that allows venting to the main tank?

Answer 11

Top

Question 12

Why does the main tank have internal structure?

Answer 12

To dampen sloshing

Question 13

Which tank is crossed by the most fuel system piping?

Answer 13

Main

Question 14

Wing tanks are ___-type

Answer 14

box

Question 15

How many cells are the wing tanks divided into by spars and ribs?

Answer 15

17

Question 16

What forms the roof and floor of the wing tanks?

Answer 16

Wing skin

Question 17

How are the wing tanks connected to the main tank?

Answer 17

Pipes and non-return valves

Question 18

How many external tanks available?

Answer 18

Up to 3

Question 19

Capacity of each external tank

Answer 19

500kg

Question 20

How many compartments are the external tanks divided into?

Answer 20

3

Question 21

Why are the external tanks divided into compartments?

Answer 21

To control CG

Question 22

All equipment necessary for the external tank is located ______

Answer 22

within the tank

Question 23

Under what conditions are the external tanks jettisonable?

Answer 23

No WoW

Question 24

How are the tanks refueled?

Answer 24

Single point pressure refueling receptacle

Question 25

Which tanks can be gravity refueled?

Answer 25

Collector and main (NOT wings)

Question 26

FCP stands for what?

Answer 26

Fuel Control Panel

Question 27

FCP must be ____ to enable air refuel, must be at _____ to enable ground refuel.

Answer 27

OFF, ON

Question 28

FMS automatically stops fueling when reaching _________

Answer 28

preset quantity

Question 29

What type of air refueling?

Answer 29

Probe and drogue type

Question 30

What is the air refueling system connected to?

Answer 30

ground pressure refueling line

Question 31

Where is the AAR probe mounted?

Answer 31

Right side of the front fuselage

Question 32

What is the AAR probe controlled by?

Answer 32

FCP A/R push-button indicator

Question 33

How long will the A/R push-button indicator flash for before the AIR REFUEL legend appears on the HUD?

Answer 33

5 seconds

Question 34

What is confirmed by the steady illumination of green light on A/R indicator?

Answer 34

Fuselage vent and all shut off valves for ext tanks are open.

Question 35

T/F: AAR stops automatically if tanks are full or probe disengages.

Answer 35

True

Question 36

T/F: Breaking the probe will cause a fuel leak.

Answer 36

False, probe can be broken without fuel spillage

Question 37

How to close all applicable valves before proceeding w mission?

Answer 37

Press the A/R push-button again

Question 38

Vent valve connected from _____ tank to _______

Answer 38

main, tail cone

Question 39

Vent valve is _______ operated for re/defueling and _____ operated during alt variations.

Answer 39

motor, spring

Question 40

External tanks are vented by what?

Answer 40

Their own valves

Question 41

Order for fuel transfer:

Answer 41

1. Main tank upper section 2. Ext fuselage centerline tank (if installed) 3. External underwing tanks (if installed) 4. Main tank middle section and wing tanks 5. Main tank bottom section 6. Collector tank

Question 42

Wings to main tank happens via _____

Answer 42

gravity

Question 43

FMS accepts asymmetries up to ______

Answer 43

50kg

Question 44

How does the FMS restore symmetry?

Answer 44

Forcing fuel transfer via a jet pump

Question 45

UNBALANCE Caution if >____kg asymmetry for >____sec

Answer 45

100, 30

Question 46

During normal ops, when fuel in each wing reaches <____kg, both jet pumps start to drain the wings

Answer 46

50

Question 47

Which cautions indicate that forced fuel transfer will be inhibited?

Answer 47

[L or R] FUEL P or ACCURACY

Question 48

Collector tank remains full at flight attitudes up to ____ deg

Answer 48

40

Question 49

Emergency fuel transfer to collector tank via

Answer 49

flapper valve at bottom of the tank

Question 50

Fuel transfer from ext tanks initiated automatically when fuel decreases below ___________

Answer 50

optical sensor in main tank (850-800kg)

Question 51

If fuel in main tank decreases below optical sensor for ___sec and the underwing tanks still have gas, _______ caution is displayed

Answer 51

20, FUEL XFER

Question 52

If unbalance in excess of ____kg for underwing tanks, FMS closes transfer valve of ______ tank

Answer 52

50, emptier

Question 53

UNBALANCE caution comes on w unbalance >____kg for >____sec

Answer 53

100, 30

Question 54

How many AC/DC (lol) fuel pumps?

Answer 54

2 AC, 1DC

Question 55

What is the DC pump for?

Answer 55

starting, APU, or emergencies does not provide motive flow for jet pumps

Question 56

When are AC pumps energized, and what happens to the DC pump?

Answer 56

one engine running or ext AC power it is de-energized

Question 57

DC pump is plugged into ____ engine feed in case of failure of AC pumps, the ____ engine is suction fed (must descend below _____ft MSL) as the x-feed valve is closed.

Answer 57

right, left, 20k

Question 58

In case of single AC pump failure, ___________ allows one pump to feed both engines.

Answer 58

crossfeed valve

Question 59

Fuel quantity measured by ___ probes in collector and main, ___ in each wing, and ___ in each external tank.

Answer 59

4, 3, 3

Question 60

Total fuel qty computed by ___ and provided w resolution of ___kg

Answer 60

FCP, 10

Question 61

FUEL LOW caution

Answer 61

<380+/-20kg in fuselage tank

Question 62

COLLECTOR caution

Answer 62

<150+/-20kg in collector tank

Question 63

TANK HP caution

Answer 63

28 kPag

Question 64

TANK LP caution

Answer 64

-7 kPag