CABIN ATMOSPHERE AND RAIN CONTROL Flashcards

1
Q

Which section of a turbine engine provides high pressure bleed air to an
air cycle machine for pressurization and air-conditioning?

A

Turbine compressor.

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2
Q

At which component in an air cycle cooling system does air undergo a
pressure and temperature drop?

A

Expansion turbine.

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3
Q

In a freon vapor cycle cooling system, where is cooling air obtained for the
condenser?

A

Ambient air

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4
Q

In a freon vapor cycle cooling system, where is cooling air obtained for the
condenser?

A

Ambient air

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5
Q

What controls the operation of the cabin pressure regulator?

A

Cabin altitude.

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6
Q

The basic air cycle cooling system consists of…

A

a source of compressed air, heat exchangers, and a turbine.

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7
Q

The purpose of the dump valve in a pressurized aircraft is to relieve________.

A

all positive pressure from the cabin.

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8
Q

What component might possibly be damaged if liquid refrigerant is introduced into
the low side of a vapor cycle cooling system when the pressure is too high or the
outside air temperature is too low?

A

Compressor.

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9
Q

Frost or ice buildup on a vapor cycle cooling system evaporator would most
likely be caused by________.

A

inadequate airflow through the evaporator.

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10
Q

The altitude controller maintains cabin altitude by modulation of the____.

A

outflow valve.

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11
Q

Hot compressor bleed air operates the conditioned air system on some turbine
aircraft, how is cold air supplied?

A

By the air cycle machine turbine.

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12
Q

The main cause of contamination in gaseous oxygen systems is____.

A

moisture.

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13
Q

The point at which freon flowing through a vapor cycle cooling system gives up heat
and changes from a gas to a liquid is the________.

A

condenser.

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14
Q

The point at which freon flowing through a vapor cycle cooling system absorbs heat
and changes from a liquid to a gas is the______.

A

evaporator.

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15
Q

On some cabin pressurization systems, pressurization on the ground is restricted
by the____________.

A

main landing gear operated switch.

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16
Q

The function of the evaporator in a freon cooling system is to______ .

A

lower the temperature of the cabin air.

17
Q

What component of a pressurization system prevents the cabin altitude from
becoming higher than airplane altitude?

A

Negative pressure relief valve

18
Q

When checking a freon system, a steady stream of bubbles in the sight
gauge indicates the charge is________.

A

low.

19
Q

The cabin pressurization modes of operation are______.

A

differential, unpressurized, and isobaric.

20
Q

What is the condition of the refrigerant as it enters the condenser of a vapor
cycle cooling system?

A

high pressure vapor.

21
Q

What is the condition of the refrigerant as it leaves the condenser of a vapor cycle
cooling system?

A

high pressure liquid.

22
Q

What is the condition of the refrigerant as it leaves the condenser of a vapor cycle
cooling system?

A

high pressure liquid.

23
Q

What is used in some oxygen systems to change high cylinder pressure to low
system pressure?

A

Pressure reducer valve.

24
Q

In a high-pressure oxygen system, if the pressure reducer fails, what prevents high
pressure oxygen from entering the system downstream?

A

Pressure relief valve.

25
Q

A contaminated oxygen system is normally purged with_______________.

A

oxygen.