AC ENVIRONMENT AND AUXILIARY SYSTEM

Question 1

5 overview topics

Answer 1

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

Question 2

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

Answer 2

BELOW 0°F

Question 3

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

Answer 3

BLEED AIR

Question 4

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

Answer 4

AIR CYCLE MACHINE EXPANSION TURBINE

Question 5

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

Answer 5

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

Question 6

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

Answer 6

BLEED AIR HEAT SYSTEM

Question 7

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

Answer 7

MINI-EJECTORS

Question 8

It is used to heat the aircraft.

Answer 8

ELECTRIC HEATING DEVICE

Question 9

Electricity flowing through a heating element makes the element warm.

Answer 9

Electricity flowing through a HEATING ELEMENT makes the element warm

Question 10

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

Answer 10

ELECTRIC HEATING ELEMENT HEATERS

Question 11

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

Answer 11

EXHAUST SHROUD HEATING SYSTEMS

Question 12

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

Answer 12

AMBIENT AIR

Question 13

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

Answer 13

EXHAUST SHROUD HEATING SYSTEMS

Question 14

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

Answer 14

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

Question 15

Inspecting for leaks

Answer 15

SOAPY SOLUTION

Question 16

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

Answer 16

EVERY 100 HOURS

Question 17

It is slightly modified in a shroud heat configuration

Answer 17

EXHAUST SYSTEM

Question 18

It is slightly modified in a shroud heat configuration

Answer 18

EXHAUST SYSTEM

Question 19

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

Answer 19

NUMEROUS WELDED STUDS

Question 20

It is used on many small to medium sized aircraft.

Answer 20

AIRCRAFT COMBUSTION HEATER

Question 21

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

Answer 21

AIRCRAFT COMBUSTION HEATER

Question 22

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

Answer 22

COMBUSTION HEATER

Question 23

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

Answer 23

VENTILATING AIR

Question 24

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

Answer 24

VENTILATING AIR

Question 25

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

Answer 25

SQUAT SWITCH

Question 26

Aircraft-cooling systems, also called as ____________.

Answer 26

AIR-CONDITIONING SYSTEMS

Question 27

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

Answer 27

AIR COOLING SYSTEMS

Question 28

Two basic methods of reducing the temperature of aircraft

Answer 28

FREON VAPOR - CYCLE MACHINE AIR -CYCLE MACHINE

Question 29

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

Answer 29

AIR -CYCLE MACHINE

Question 30

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

Answer 30

VAPOR - CYCLE MACHINE

Question 31

It cools the engine/APU bleed air.

Answer 31

PRIMARY HEAT EXCHANGER

Question 32

It removes the heat of compression of the ACM.

Answer 32

SECONDARY HEAT EXCHANGER

Question 33

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

Answer 33

AIR -CYCLE MACHINE

Question 34

Normally an aircraft has two or three of these ACM.

Answer 34

Normally an aircraft has TWO or THREE of these ACM.

Question 35

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

Answer 35

AIR CONDITIONING PACK

Question 36

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.

Answer 36

VAPOR-CYCLE AIR-CONDITIONING SYSTEM

Question 37

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

Answer 37

OPERATION OF VAPOR-CYCLE MACHINES

Question 38

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.

Answer 38

CUTOUT AND INTERRUPT SYSTEMS

Question 39

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

Answer 39

INTERRUPTION IN COMPRESSOR OPERATION

Question 40

The latent heat of vaporization.

Answer 40

HEAT

Question 41

When a gas is compressed, its temperature increases

Answer 41

WHEN A GAS IS COMPRESSED, ITS TEMPERATURE INCREASES

Question 42

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

Answer 42

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

Question 43

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

Answer 43

COCKPIT AND CABIN

Question 44

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

Answer 44

EVAPORATOR

Question 45

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

Answer 45

CONDENSER

Question 46

It is where the cooling process starts.

Answer 46

COMPRESSOR

Question 47

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

Answer 47

COMPRESSOR

Question 48

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.

Answer 48

REFRIGERANT 12 FREON 12

Question 49

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

Answer 49

COMPRESSOR

Question 50

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

Answer 50

RECEIVER-DRYER-FILTER

Question 51

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

Answer 51

SIGHT GLASS

Question 52

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

Answer 52

LOW AND REQUIRES REPLENISHMENT

Question 53

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

Answer 53

AIR-CYCLE COOLING SYSTEMS

Question 54

When a gas (air) is compressed, it becomes heated, When the pressure is reduced, the gas becomes cooled.

Answer 54

WHEN A GAS (AIR) IS COMPRESSED, IT BECOMES HEATED, WHEN THE PRESSURE IS REDUCED, THE GAS BECOMES COOLED.

Question 55

It can be used as a cooling agent.

Answer 55

COLD AIR