Reviewer

Question 1

(?) is mechanically similar to the brake-turbine arrangement. In this case however, the turbine drives a large centrifugal fan instead of a normal compressor.

Answer 1

TURBO-FAN TYPE

Question 2

the difference between the air pressure inside the cabin and the air pressure outside the cabin.

Answer 2

CABIN DIFFERENTIAL PRESSURE

Question 3

When ignited, it produces oxygen as it burns. This can be filtered and delivered through a hose to a mask that can be worn and breathed directly by the user.

Answer 3

SODIUM CHLORATE

Question 4

is also known as barometric pressure and is measured with a barometer.

Answer 4

ATMOSPHERIC PRESSURE

Question 5

is a colorless, odorless, and tasteless gas at normal atmospheric temperatures and pressures. It transforms into a liquid at -183 °C (its boiling point).

Answer 5

OXYGEN

Question 6

is considered part of Earth’s atmosphere, but air density is so low that most of this layer is what is normally thought of as outer space.

Answer 6

THERMOSPHERE

Question 7

can be used as an alternative to the air cycle cooling system. Although not commonly used these days for air conditioning systems, the system may be used as the means to remove heat from electrical and electronic equipment.

Answer 7

VAPOUR CYCLE COOLING SYSTEM

Question 8

This system is used most frequently by the crew on high performance and air transport category aircraft.

Answer 8

DEMAND FLOW SYSTEM

Question 9

is used to induce air across the condenser matrix when the aircraft is stationary on the ground and no ram air is available.

Answer 9

CONDENSER FAN

Question 10

occurs when carbon monoxide builds up in your bloodstream.

Answer 10

CARBON MONOXIDE POISONING

Question 11

are used to prevent the over pressurization of the aircraft cabin. They open at a preset differential pressure and allow air to flow out of the cabin.

Answer 11

PRESSURIZATION SAFETY VALVES

Question 12

The valve for mixing is controlled in the cockpit or cabin by a

Answer 12

TEMPERATURE SELECTOR

Question 13

This special container is used to store and transport liquid oxygen. It uses an evacuated, double-walled insulation design to keep the liquid oxygen under pressure at a very low temperature.

Answer 13

DEWAR BOTTLE

Question 14

During ground operations and prior to takeoff, the (?) typically controls the position of the pressurization safety valve, which is held in the open position until the aircraft takes off.

Answer 14

WOW SWITCH

Question 15

Liquids with a (?) have a stronger tendency to evaporate at normal temperatures than those with a high boiling point.

Answer 15

LOW BOILING POINT

Question 16

These are components within the air conditioning system that transfer heat from one gas stream to another.

Answer 16

HEAT EXCHANGERS

Question 17

given the air pressure inside the cabin, the altitude on a standard day that has the same pressure as that in the cabin.

Answer 17

CABIN ALTITUDE

Question 18

the rate of change of air pressure inside the cabin, expressed in feet per minute (fpm) of cabin altitude change.

Answer 18

CABIN RATE OF CLIMB

Question 19

A (?) is used to prevent ground source air from flowing upstream into the air conditioning system.

Answer 19

CHECK VALVE

Question 20

acts as a reservoir and provides storage for the refrigerant, normally a highly volatile chemical such as Freon.

Answer 20

LIQUID RECEIVER

Question 21

This mode works to maintain cabin altitude at a single pressure despite the changing altitude of the aircraft.

Answer 21

ISOBARIC MODE

Question 22

Mixing (?) with bleed air in a duct or a mixing chamber allows the crew to select the exact temperature desired for the cabin.

Answer 22

AIR-CONDITIONED AIR

Question 23

A key factor in (?) is the ability of the fuselage to withstand the forces associated with the increase in pressure inside the structure versus the ambient pressure outside.

Answer 23

PRESSURIZATION

Question 24

The second most prevalent substance in the atmosphere

Answer 24

OXYGEN

Question 25

what does WOW stand for? *

Answer 25

WEIGHT ON WHEELS

Question 26

This also provides automatic control of pressurization, usually with different inputs, a standby controller, or standby outflow valve operation.

Answer 26

STANDBY MODE

Question 27

provides cooling when the pressure of the charge air is reduced by increasing its velocity and expanding it across the turbine of a so-called Air Cycle Machine.

Answer 27

EXPANSION

Question 28

composed principally of 78 percent nitrogen and 21 percent oxygen.

Answer 28

ATMOSPHERE/ AIR

Question 29

it can be used with the aircraft stationary on the ground with the aircraft engines running. It does not need to rely solely on ram air as the cooling medium for the pre-cooler.

Answer 29

TURBO-FAN

Question 30

This is achieved by using the charge air to drive a turbine, which is connected by a shaft to the compressor or fan within the cold air unit, thus converting heat energy into kinetic energy.

Answer 30

ENERGY CONVERSION

Question 31

the second layer. It starts above the troposphere and ends about 31 miles (50 km) above ground.

Answer 31

STRATOSPHERE

Question 32

is tested for the presence of water. This is done to avoid the possibility of it freezing in the small passage ways of valves and regulators.

Answer 32

AVIATOR’S BREATHING OXYGEN

Question 33

the highest layer, is extremely thin and is where the atmosphere merges into outer space.

Answer 33

EXOSPHERE

Question 34

Once in flight, the (?) automatically controls the sequence of operation of the pressurization components until the aircraft lands.

Answer 34

PRESSURIZATION CONTROLLER

Question 35

is used as the cooling medium to cool the very hot charge air ducted from the engine compressor or the gearbox mounted air compressor or blower.

Answer 35

RAM AIR