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2ND SEMESTER_PRELIM > AC ENVIRONMENT AND AUXILIARY SYSTEM > Flashcards

AC ENVIRONMENT AND AUXILIARY SYSTEM Flashcards

1
Q

5 overview topics

A

BLEED AIR SYSTEMS
ELECTRIC HEATING SYSTEM
EXHAUST SHROUD HEATER
COMBUSTION HEATER
VENTILATING AIR SYSYTEM

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2
Q

Temperatures at high altitudes in which aircraft operate can be well _______.

A

BELOW 0°F

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3
Q

It is mixed with ambient air, or cabin return air, and distributed throughout the aircraft via ducting

A

BLEED AIR

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4
Q

Pressurized aircraftthat use air cycleair conditioning systemsmix bleed air with cold air produced WHAT?

A

AIR CYCLE MACHINE EXPANSION TURBINE

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5
Q

The mixing of air can be done in a variety of ways.

A

MIXING AIR VALVES
FLOW CONTROL VALVES
SHUTOFF VALVES
VARIOUS CONTROL VALVES CONTROLLED BY SWITCHES IN THE COCKPIT

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6
Q

It uses mini-ejectors in helicopter cabins to combine bleed air with cabin air.

A

BLEED AIR HEAT SYSTEM

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7
Q

Bleed air heat system use this in helicopter cabins to combine bleed air with cabin air.

A

MINI-EJECTORS

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8
Q

It is used to heat the aircraft.

A

ELECTRIC HEATING DEVICE

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9
Q

Electricity flowing through a heating element makes the element warm.

A

Electricity flowing through a HEATING ELEMENT makes the element warm

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10
Q

It require a significant amount of the aircraft’s generator output, which is better dedicated to the operation of other electrical devices.

A

ELECTRIC HEATING ELEMENT HEATERS

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11
Q

It is use most single-engine light aircraft to heat the cabin.

A

EXHAUST SHROUD HEATING SYSTEMS

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12
Q

It is directed into a metal shroud, or jacket, that encases part of the engine’sEXHAUST SYSTEM.

A

AMBIENT AIR

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13
Q

It is the possibility that exhaust gases could contaminate the cabin air.

A

EXHAUST SHROUD HEATING SYSTEMS

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14
Q

Even the slightest crack in an exhaust manifold could send enough carbon monoxide into the cabin.

A

Even the slightest crack in an exhaust manifold could send enough CARBON MONOXIDE into the cabin.

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15
Q

Inspecting for leaks

A

SOAPY SOLUTION

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16
Q

Frequency of exhaust heat leak detection can be every, in how many hours?

A

EVERY 100 HOURS

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17
Q

It is slightly modified in a shroud heat configuration

A

EXHAUST SYSTEM

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18
Q

It is slightly modified in a shroud heat configuration

A

EXHAUST SYSTEM

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19
Q

It used to increase heat transfer from the exhaust to the ambient air going to the cabin.

A

NUMEROUS WELDED STUDS

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20
Q

It is used on many small to medium sized aircraft.

A

AIRCRAFT COMBUSTION HEATER

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21
Q

It is a heat source independent from the aircraft’s engine(s), although it does use fuel from the aircraft’s main fuel system.

A

AIRCRAFT COMBUSTION HEATER

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22
Q

Those are manufactured by a few different companies that supply the aviation industry.

A

COMBUSTION HEATER

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23
Q

It is the name of the air that is warmed and sent into the cabin.

A

VENTILATING AIR

24
Q

Typically, it comes into the combustion heater through a ram air intake.

A

VENTILATING AIR

25
Q

This is a switch positioned to open and close depending on the extension or compression of the main landing gear strut.

A

SQUAT SWITCH

26
Q

Aircraft-cooling systems, also called as ____________.

A

AIR-CONDITIONING SYSTEMS

27
Q

They are used to reduce the temperature inside an aircraft for crew and passenger comfort.

A

AIR COOLING SYSTEMS

28
Q

Two basic methods of reducing the temperature of aircraft

A

FREON VAPOR - CYCLE MACHINE

AIR -CYCLE MACHINE

29
Q

It uses the compression and expansion of air to lower the temperature of the cabin air.

A

AIR -CYCLE MACHINE

30
Q

It is a closed system using the evaporation and condensation of Freon to remove heat from the cabin interior.

A

VAPOR - CYCLE MACHINE

31
Q

It cools the engine/APU bleed air.

A

PRIMARY HEAT EXCHANGER

32
Q

It removes the heat of compression of the ACM.

A

SECONDARY HEAT EXCHANGER

33
Q

It is the refrigeration unit of the environmental control system (ECS) used in pressurized gas turbine-powered aircraft.

A

AIR -CYCLE MACHINE

34
Q

Normally an aircraft has two or three of these ACM.

A

Normally an aircraft has TWO or THREE of these ACM.

35
Q

Each ACM and its components are often referred as an _____________.

A

AIR CONDITIONING PACK

36
Q

It is used in reciprocating-engine-powered aircraft and in smaller turboprop aircraft that do not make use of air-cycle machines to reduce the cabin interior temperature.

A

VAPOR-CYCLE AIR-CONDITIONING SYSTEM

37
Q

It is controlled by the pilot and may incorporate automatic cutout or interrupt systems.

A

OPERATION OF VAPOR-CYCLE MACHINES

38
Q

These are used to disengage the refrigerant compressor during demand for high engine power output, such as during takeoff operations or when one engine of a multiengine aircraft has failed.

A

CUTOUT AND INTERRUPT SYSTEMS

39
Q

It allows all available power to be used to maintain controllable flight.

A

INTERRUPTION IN COMPRESSOR OPERATION

40
Q

The latent heat of vaporization.

A

HEAT

41
Q

When a gas is compressed, its temperature increases

A

WHEN A GAS IS COMPRESSED, ITS TEMPERATURE INCREASES

42
Q

When the pressure on a gas is decreased, its temperature decreases.

A

WHEN THE PRESSURE ON A GAS IS DECREASED, ITS TEMPERATURE DECREASES.

43
Q

A vapor-cycle cooling system takes advantage of these laws of nature using two heat-exchangers to control the temperature of the _______________.

A

COCKPIT AND CABIN

44
Q

It works in a fashion similar to the one previously discussed, taking heat from the closed system.

A

EVAPORATOR

45
Q

It draws heat from the air and adds it to the closed system.

A

CONDENSER

46
Q

It is where the cooling process starts.

A

COMPRESSOR

47
Q

It is to push the refrigerant, under pressure, through the entire system.

A

COMPRESSOR

48
Q

It is a gas at standard pressure and temperature but becomes a liquid when its pressure is increased sufficiently or when the temperature is reduced to the required level.

A

REFRIGERANT 12

FREON 12

49
Q

It is the source of energy required for the operation of the system.

A

COMPRESSOR

50
Q

It is essentially a reservoir containing a filter and a desiccant.

A

RECEIVER-DRYER-FILTER

51
Q

It is usually located on top of the receiver to allow observation of the fluid flow through the unit.

A

SIGHT GLASS

52
Q

If bubbles are seen in the fluid, the system refrigerant is known to be ____________________.

A

LOW AND REQUIRES REPLENISHMENT

53
Q

It utilize the same principles of thermodynamics and the same laws of gases involved in vapor-cycle systems.

A

AIR-CYCLE COOLING SYSTEMS

54
Q

When a gas (air) is compressed, it becomes heated,

When the pressure is reduced, the gas becomes cooled.

A

WHEN A GAS (AIR) IS COMPRESSED, IT BECOMES HEATED,

WHEN THE PRESSURE IS REDUCED, THE GAS BECOMES COOLED.

55
Q

It can be used as a cooling agent.

A

COLD AIR

2ND SEMESTER_PRELIM (8 decks)

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