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x. ORAL STUDY GUIDE - 737NG > FUEL SYSTEM > Flashcards

FUEL SYSTEM Flashcards

1
Q
  1. What does ENG VALVE CLOSED mean when bright blue?
A

 In transit or disagreement

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2
Q
  1. What does ENG VALVE CLOSED mean when dim blue?
A

 Valve closed

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3
Q
  1. What does SPAR VALVE CLOSED mean when bright blue?
A

 In transit or disagreement

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4
Q
  1. What does SPAR VALVE CLOSED mean when dim blue?
A

 Valve closed

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5
Q
  1. What is the position of the engine valve or spar valve if the lights are extinguished?
A

 Open

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6
Q
  1. Which valve is controlled by the start lever,

engine valve or spar valve?

A

 Both, Spar valve and engine valve

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7
Q
  1. Which one of these valves is controlled by the

engine fire switch?

A

 Both

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8
Q
  1. Which one of these valves is controlled by the

respective EEC?

A

 Engine valve

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9
Q
  1. What is the maximum fuel temperature?
A

 49C

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10
Q
  1. What is the minimum fuel temperature?
A

 -43C or fuel freeze +3C (whichever is higher)

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11
Q
  1. What is indicated by a FILTER BYPASS light?
A

 Impending filter bypass (contaminated fuel)

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12
Q
  1. Could the Filter Bypass light be ice? Why not?
A

 Not likely. Fuel is warmed prior to entering filter

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13
Q
  1. If a fuel valve is in transit, is it bright or dim?
A

 Bright

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14
Q
  1. Is the fuel crossfeed from tank to tank or tank to engine?
A

 Tank to engine

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15
Q
  1. How many valves are controlled with the

crossfeed switch?

A

 One

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16
Q
  1. What electrical power is needed to operate the

crossfeed valve?

A

 Battery bus

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17
Q
  1. Are the Center Tank FUEL LOW PRESS lights

always armed to indicate low pressure?

A

 No, only in ON position

18
Q
  1. What does the Center Tank FUEL LOW PRESS

lights mean?

A

 Pumps are on with output either LOW or NO pressure

19
Q
  1. If only one Center Tank LOW PRESS light is on, will the Master Caution light illuminate?
A

 Yes, it only takes one LOW PRESS light to give you the MC lights and FUEL ANNUNCIATOR on the center tanks

20
Q
  1. With one Center Tank pump OFF, will illumination of the opposite low press light illuminate the MC light?
A

 Yes

21
Q
  1. What is the electrical power source for the center tank pumps?
A

 AC Power

22
Q
  1. What is the electrical power source for the

main tank fuel pumps?

A

 AC Power

23
Q
  1. What does illumination of a AFT/FWD fuel

LOW PRESS light mean?

A

 Low output press or switch is off

24
Q
  1. What sort of indication would you get with the

illumination of just one LOW PRESS light in the center tank?

A

 Master caution and fuel annunciator on recall

25
Q
  1. What indication would you get with illumination of both LOW PRESS lights in the same tank?
A

 Master caution and fuel annunciator lights

26
Q
  1. How many fuel sticks are there in a Main

Tank?

A

 six

27
Q
  1. How many fuel sticks are there in the Center

Tank?

A

 four

28
Q
  1. Which fuel is used first, Center Tank or Main

Tank?

A

 Center tank fuel

29
Q
  1. Do Center Tank pumps produce the same

pressure as Main Tank pumps?

A

 No, higher output

30
Q
  1. Engines have mechanical fuel pumps. Can

they suck fuel?

A

 Yes

31
Q
  1. Can fuel be suctioned from the Main Tanks?

Why?

A

 Yes. They have a bypass valve

32
Q
  1. What does CONFIG indicate on the Center

Tank gage?

A

 Center tank quantity >1600lbs with lowor no pump pressure and engine is running

33
Q
  1. Can fuel be suctioned from the Center Tank?

Why?

A

 No. No bypass valve

34
Q
  1. The Center Tank has a fuel scavenge jet

pump. What does it do?

A

 Transfers remaining center tank fuel to #1 main tank when #1 main tank is approximately half full and #1 fwd boost pump is running

35
Q
  1. Where is the fuel temperature sensor located?
A

 #1 main tank

36
Q
  1. Which tank can supply the APU?
A

 Any tank with the appropriate pump on

and crossfeed position

37
Q
  1. Which tank can the APU suction feed from?
A

 #1 main tank

38
Q
  1. What is the total capacity of the fuel system?
A

 46,000lbs

39
Q
  1. How much fuel can the Center Tank hold?
A

 28,800lbs

40
Q
  1. What does LOW indicate on the main tank

gages?

A

 Fuel quantity less than 2.000lbs

41
Q
  1. Can you get a LOW indication on the Center

Tank gage?

A

 no

42
Q
  1. What does IMBAL indicate on the Main Tank

gage?

A

 Mains differ by more than 1000lb

x. ORAL STUDY GUIDE - 737NG (18 decks)

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