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CAL B747 Systems > Pneumatics > Flashcards

Pneumatics Flashcards

1
Q

Trim air switch when turned on allows automatic and manual selection of pack controllers A or B enabled. True or False

A

TRUE (FCOM 2.10.5)

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2
Q

Pilot auxiliary heat is provided by____ elements

A

electric (FCOM 2.20.12)

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3
Q

Equipment cooling system provides cooling air for____

A

flight deck equipment and to the electrical and electronics compartment (FCOM 2.20.12)

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4
Q

Cabin Altitude Controller in Cruise Mode has a maximum of___

A

8,000’ (FCOM 2.30.2)

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5
Q

Landing elevation limits are___below mean sea level to___above mean sea level

A

-1,000’ to + 14,000’ (FCOM 2.30.2)

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6
Q

Pack control selector switch in the normal position does

A

alternate automatically between a or b (FCOM 2.10.9)

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7
Q

The flight deck fan switch on and all packs off there is no airflow to cockpit. True or False

A

FALSE - Supplies recirculated air (FCOM 2.20.4)

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8
Q

Trim air switch turned on all flight deck zone trim air valves operate automatically except

A

NONE - Flight deck main deck trim valves opearate automatically

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9
Q

Aft cargo heat switch ON provides bleed air heat to

A

aft and bulk cargo compartments (FCOM 2.10.8)

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10
Q

Engine Bleed Air Fault Light is caused by

A

Bleed air overheat or overpressure…or PRV open when commanded closed (FCOM 2.10.16)

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11
Q

Three airconditioning packs draw air from

A

engines\APU\external that supply the bleed air duct (FCOM 2.40.1)

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12
Q

The pack valve is____controlled and___operated.

A

electrically, phematically (FCOM 2.20.2)

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13
Q

The temperature zone requiring the warmest temperature controls the pack outlet temperature. True or False

A

FALSE

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14
Q

Closing the right isolation valve will prevent bleed air from reaching hydraulic demand pump 4. True or False

A

False. (FCOM 2.40.5)

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15
Q

With the pax temp selector in auto and the system operating normally, which temp. zone determines the outlet temp of the packs?

A

the zone requiring the coolest temp (FCOM 2.20.7)

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16
Q

What does selecting the equipment cooling selector STDBY position do?

A

Manually reconfigures the cooling equip in flight for FLIGHT situation(FCOM 2.10.6)

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17
Q

In flight, what does placing the captain’s foot heater switch to LO or HI do?

A

under floor electric heater operates at high\low rate (FCOM 2.10.12)

18
Q

Shoulder and foot heaters operate in flight only. True or False

A

TRUE (FCOM 2.10.11)

19
Q

When is the EICAS warning message CABIN ALTITUDE displayed?

A

cabin altitude > 10,000’ (FCOM 2.50.1)

20
Q

Placing the landing altitude in manual (Amber landing altitude displayed, all data is displayed landing elevation def. pressure etc)

A

Done when this data is missing from the FMS (FCOM 2.10.14)

21
Q

What does selecting the equipment cooling selector OVRD position do?

A

Provides cooling, uses reverse airflow for diff pressure. (FCOM 2.10.6)

22
Q

With a pack control selector in the NORM position, which of the following is correct? All answers correct

A

pack a or b selected automatically on alternate flights as primary controller while the other one is selected if the primary has failed (FCOM 2.10.9)

23
Q

The cabin pressurization system is normally fully automatic, but the outflow valves may be positioned manually. True or False

A

TRUE (FCOM 2.10.15)

24
Q

At what cabin altitude will the outflow valves close in the automatic mode?

A

11,000’ (FCOM 2.30.2)

25
Q

When is the EICAS advisory message PRESS RELIEF displayed?

A

when one or both pressure relief valves open with all packs on (QRH 2.27 FCOM 2.50.2)

26
Q

With the master temp set at 83 degrees f (28 deg. c), what is the maximum zone target temp setting using the cabin tamp panel?

A

85f\29c (FCOM 2.20.8)

27
Q

What does pushing the outflow valve MAN left switch on do?

A

EICAS outflow valve L displayed….outflow valve controlled manually (FCOM 2.10.14)

28
Q

Packs will be in high flow during_____

A

Takeoff……..when High Flow switch is On or takeoff\climb\approach (FCOM 2.20.2)

29
Q

Which of the following regarding failure of the selected pack controller is true?

A

Pack A or B normal, the controller switches to the other controller automatically. (FCOM 2.20.2)

30
Q

With the HI FLOW switch off, which of the following is true?

A

Pack airflow is controlled automtically (FCOM 2.10.7)

31
Q

When is the EICAS advisory message BLEED displayed and the engine bleed air system fault light illuminated?

A

bleed air overpressure, overheat, HP bleed valve\PRV fail to close when commanded (FCOM 2.40.4 FCOM 2.10.16)

32
Q

What source normally supplies engine bleed air during low thrust conditions?

A

HP engine section (FCOM 2.40.1)

33
Q

Where is pneumatic duct pressure displayed?

A

Primary and secondary ()

34
Q

What are the indications if an HP bleed valve fails to close when engine thrust is increased?

A

SYS fault light and bleed 1 advisory msg… “BLEED #” advisory on EICAS (FCOM 2.50.1)

35
Q

What does the EICAS advisory message >BLEED 1 OFF mean?

A

Eng 1 bleed valve is close with eng running and bleed switch off (FCOM 2.50.1)

36
Q

At high engine power settings, which engine compressor section furnishes bleed air for the pneumatic system?

A

The IP section (FCOM 2.40.1)

37
Q

Pushing the APU bleed air switch on, opens the APU bleed isolation valve, with the APU running. True or False

A

True. 95% APU N1 (FCOM 2.40.3)

38
Q

The PRV will open with the engine bleed air switch off. When:

A

when nacelle anti ice selected on, provided the HP bleed valve isnt failed open, start valve closed. There isnt a prior overheat problem (FCOM 2.40.2)

39
Q

When is the EICAS advisory message BLEED ISLN L/R displayed

A

isolation valve switch position and valve position disagree (FCOM 2.50.1)

40
Q

When will the APU bleed air valve open?

A

When EICAS memo msg APU running and APU switch on

41
Q

What is bleed air used for?

A

1.Air conditioning 2.pressurization 3.Anti Ice 4.ENG start 5.LE flaps ……6 .T\R 7.hyd ADP 8.hyd reservoir pressurization 9.potable water tank 10.cargo smoke detection 11.aft cargo heat (FCOM 2.40.1)

CAL B747 Systems (18 decks)

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