Air Conditioning Questions Flashcards

1
Q

The Air conditioning system temperature is regulated by

A

One zone controller and two PACK controllers

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2
Q

The pack flow control valve automatically closes for all but which of the following

A

High air pressure

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3
Q

Under normal conditions it is possible to control temperature in all areas except the

A

Forward cargo compartment

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4
Q

If the APU is supplying bleed air or one PACK fails, ______ flow is delivered regardless of pack flow selector position

A

HI

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5
Q

If Pack Flow is selected to LO and temperature demand cannot be satisfied, the pack reverts to _____flow

A

NORM

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6
Q

What happens if a zone cooling demand is not met due to low bleed pressure

A

Engine idle is automatically increased

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7
Q

The PACK valves close when the ENG MODE SEL switch is placed to ING/START on the ground prior to engine start. When will they reopen?

A

30 seconds after first engine start if second engine start has not been initiated

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8
Q

Hot _____ air from the pneumatic system is used to maintain desired zone temperature

A

Trim

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9
Q

Using external conditioned ground air simultaneously with airplane pack air is

A

Prohibited

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10
Q

The HOT AIR FAULT light illuminates amber when a duct _____ is detected

A

Overheat

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11
Q

What happens to cabin zone inlet duct temperature if the lab/galley extract fan fails?

A

Cabin zone inlet duct temperature is fixed at 59F

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12
Q

Which of the following is true if the primary PACK controller channel fails

A

Secondary channel takes over automatically and the pack flow is fixed at pre-failure setting

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13
Q

What occurs if both PACK channels fail?

A

PACK outlet temp goes to a set temperature range by the pack anti-ice valve.

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14
Q

If the primary zone controller channel fails,

A

The flight deck is controlled to 76 degrees F by pack 1 and the cabin forward and aft zones are controlled to 76 degrees F by pack 2

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15
Q

ALTN MODE displays in green on the ECAM COND page when a

A

Primary zone controller fault is detected

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16
Q

IF both zone controller channels fail,

A

The related ECAM information is not displayed, and the message PACK REG apples

17
Q

What pilot action is required with loss of primary and secondary zone controller channels

A

None. System automatically goes to a fixed temperature

18
Q

Selecting the RAM AIR switch ON, opens the ram air inlet valve provided the _____ switch is not selected ON

A

DITCHING

19
Q

When will the avionics ventilation system be in the closed configuration while on the ground?

A

Cold Skin temperatures

20
Q

You are doing the walk around at ORD in January and notice both the inlet and extract valves are closed. You should

A

Continue the walk around this is normal

21
Q

The avionics ventilation system provides cooling for all the following except the

A

Cabin entertainment system

22
Q

The Air Conditioning RAM AIR switch is selected to ON, the differential pressure less than 1 PSI. The ream air inlet opens and the outflow valve

A

Opens to approximately 50% if the cabin pressure MODE SEL switch is in AUTO

23
Q

While pre-flighting, you hear a horn in the nose wheel well. Since the APU is NOT running, this may indicate a

A

Duct overheat in the avionics ventilation system