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Systems Questions > AIR COND / PRESS / VENTILATION > Flashcards

AIR COND / PRESS / VENTILATION Flashcards

1
Q

1 | Which valves will receive a close command when the DITCHING pushbutton is depressed (ARPO)?
[ FCOM-DSC-21-20-30 ]

A

º Avionics Inlet and Extract valves
º Ram air inlet
º Pack Flow Control valves
º Outflow valve (only if in AUTO mode)
º FWD cargo outlet isolation valve

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2
Q

2 | Will the DITCHING pushbutton always close the outflow valve? [ FCOM-DSC-21-20-40 ]

A

º Not if the outflow valve is under manual control

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3
Q

3 | Can the pilot control the outflow valve? [ FCOM-DSC-21-20-30 ]

A

º Yes, select MAN on the MODE SEL and use the MAN V/S CTL switch

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4
Q

4 | How many auto controllers are in the pressurization system? [ FCOM-DSC-21-20-30 ]

A

º 2, only one is used at a time and they swap roles after each landing

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5
Q

5 | How do you manually switch controllers? [ FCOM-DSC-21-20-40 ]

A

º Switch MODE SEL to MAN for 10 seconds, then back to AUTO

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6
Q

6 | What does an amber FAULT light in the MODE SEL pushbutton indicate? [ FCOM-DSC-21-20-40 ]

A

º Both automatic pressure controllers are faulty

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7
Q

7 | From what source does the pressurization system normally obtain landing elevation? [ FCOM-DSC-21-20-40 ]

A

º FMGC database

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8
Q

8 | If the FMGC database does not supply the landing elevation, how do you set the landing elevation?
[ FCOM-DSC-21-20-40 ]

A

º Manually by selecting landing elevation via the LDG ELEV knob.

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9
Q

9 | What protects the airframe from excessive cabin differential pressure? [ FCOM-DSC-21-20-20 ]

A

º 2 pressure relief valves (safety valves)

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10
Q

10 |How many outflow valve motors are installed? [ FCOM-DSC-21-20-20 ]

A

º 3 total. One for each CPC, and one for manual control.

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11
Q

11 |How would a pilot manually control the pressurization? [ FCOM-DSC-21-20-10 ]

A

º By selecting MAN on the MODE SEL pb and utilizing the MAN v/s CTL toggle switch.

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12
Q

12 |What flow rate is automatically selected when APU bleed air is in use or during single pack operation?
[ FCOM-DSC-21-10-50 ]

A

º HI

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13
Q

13 |If the engine bleed air in-flight is too low what will occur? [ FCOM-DSC-21-20-30 ]

A

º Engine speed is automatically increased to provide adequate bleed air pressure

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14
Q

14 |What would cause an amber FAULT light to illuminate in the PACK 1 and/or Pack 2 pushbutton (OOD)?
[ FCOM-DSC-21-10-50 ]

A

º Overheat - Pack outlet
º Overheat - Compressor outlet
º Discontinuity - Switch position disagreement with pack flow control valve
Note: FAULT light will be illuminated when no bleed air is supplied

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15
Q

15 |At what cabin differential pressure does the RAM AIR valve open? [ FCOM-DSC-21-10-20 ]

A

º 1 PSI ΔP or less

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16
Q

16 |What causes the Pack Flow Control valve to automatically close? [ FCOM-DSC-21-10-50 ]

A

º Upstream pressure below minimum
º Pack overheat
º Engine start sequence
º Engine FIRE pushbutton on the related side pressed
º DITCHING pushbutton is selected

17
Q

17 |What does an amber FAULT light in the HOT AIR pushbutton indicate? [ FCOM-DSC-21-10-50 ]

A

º Duct overheat - the Hot Air and Trim Air valves close automatically

18
Q

18 |How many Air Conditioning System Controllers are there & how many lanes do they have? [ FCOM-DSC-21-10-10 ]

A

º 2 Air Conditioning System Controllers
º Each Air Conditioning System Controller has 2 lanes – (Active/Standby)

19
Q

19 |Describe how the Air Conditioning System Controllers regulate temperature? [ FCOM-DSC-21-10-30 ]

A

º Basic temperature regulation: Both packs produce the required outlet temperature determined by
the lowest demanded zone temperature
º Optimized temperature regulation: Hot air is added to the individual zones by the trim air valves to maintain the desired zone temperatures

20
Q

20 |What occurs when an active lane of an Air Conditioning System Controller fails? [ FCOM-DSC-21-10-40 ]

A

º The second lane takes over

21
Q

21 |What occurs when both lanes of an Air Conditioning System Controller (ACSC) fail? [ FCOM-DSC-21-10-40 ]

A

º The related pack is lost. The hot air pressure regulating valve and associated trim air valve(s) close

22
Q

22 |How does the Air Conditioning System Controller configure its associated pack ram air inlet flap for takeoff and landing to avoid the ingestion of foreign matter? [ FCOM-DSC-21-10-30 ]

A

º Takeoff: Pack Ram Air Inlet Flap closes when takeoff power is set and the main landing gear struts are compressed. Reopens after main landing gear strut extension
º Landing: Pack Ram Air Inlet Flap closes as soon as the main landing gear struts are compressed and speed ≥ 70 knots. Opens 20 seconds after speed < 70 knots

23
Q

23 |If an air cycle machine (ACM) fails, what occurs? [ FCOM-DSC-21-20-40 ]

A

º The affected pack will operate as a heat exchanger

24
Q

24 |What effect will the engine start sequence have on the pack flow control valves? [ FCOM-DSC-21-10-20 ]

A

º The pack flow control valve will close automatically

25
Q

25 |What does the CARGO HEAT HOT AIR amber FAULT light indicate? [ FCOM-DSC-21-40-30 ]

A

º Duct overheat

26
Q

26 |What is the purpose of the CABIN FANS? [ FCOM-DSC-21-10-20 ]

A

º To re-circulate cabin air to the mixing chamber and then back to the cabin

27
Q

27 |With BLOWER and EXTRACT pushbuttons in AUTO how does the system operate?
[ FCOM-DSC21-30-20, FCOM-DSC-21-30-60 ]

A

º Ground – system is normally in the OPEN configuration
º Flight – system is normally in the CLOSED configuration
º Intermediate – Closed configuration except small internal flap in Extract Valve is open

28
Q

28 |With both BLOWER and EXTRACT pushbuttons in OVRD (smoke configuration) what are the positions of the INLET and EXTRACT valves? [ FCOM-DSC-21-30-20 ]

A

º INLET valve CLOSED
º EXTRACT valve OPEN

29
Q

29 |What is the status of the Blower and Extract fans with the Blower and Extract valves in OVRD?
[ FCOM-DSC-21-30-20 ]

A

º BLOWER fan OFF
º EXTRACT fan ON

30
Q

30 |When is air conditioning introduced into the avionics compartment? [ FCOM-DSC-21-30-20 ]

A

º Abnormal operation
º SMOKE configuration

31
Q

31 |Is the skin heat exchanger ever bypassed in flight? [ FCOM-DSC-21-30-20 ]

A

º Yes; during SMOKE configuration

32
Q

32 |What does an amber FAULT light on the BLOWER pushbutton indicate? [ FCOM-DSC-21-30-60 ]

A

º SMOKE warning is activated
º Computer power supply failure
º Low blower pressure
º Duct overheat

33
Q

33 |What does an amber FAULT light on the EXTRACT pushbutton indicate? [ FCOM-DSC-21-30-60 ]

A

º SMOKE Warning is activated
º Computer power supply failure
º Low Extract pressure

34
Q

34 |With 2 FAULT lights on the VENTILATION panel are there any other indications? [ FCOM-DSC-26-30-20 ]

A

º Yes – The SMOKE light in the GEN 1 LINE pushbutton

Systems Questions (19 decks)

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