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(Airframes)Cabin Atmosphere Ctrl Sys Airframe and Rain Ctrl Ice and > Daily Quiz > Flashcards

Daily Quiz Flashcards

1
Q

What percent of the air is comprised of oxygen?

A

21%

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2
Q

What is one thing ozone does?

A

Blocks UV rays

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3
Q

How do the ratios of gases change with elevation?

A

No change

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4
Q

What drops as altitude increases?

A

Atmospheric pressure

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5
Q

How do you treat hyperventilation?

A

Calm the person down

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6
Q

What does carbon monoxide smell like?

A

Nothing, it’s odorless

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7
Q

How does carbon monoxide affect the human body?

A

Displaces oxygen

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8
Q

What is the effect of low doses of carbon monoxide over long periods of time?

A

Death

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9
Q

How does a carbon monoxide sticker detector work?

A

changes color

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10
Q

Exhaust shroud heaters may be a source of what?

A

Carbon Monoxide

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11
Q

How can hypoxia be overcome?

A

Increase cabin pressure

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12
Q

What is the primary method of avoiding hypoxia in small aircraft without pressurization?

A

Supplemental Oxygen

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13
Q

Up to what altitude does supplemental oxygen prevent hypoxia?

A

40,000 ft

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14
Q

What is the primary means a large transportation type aircraft prevent hypoxia?

A

Pressurized cabin

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15
Q

What happens when you combine petroleum with oxygen?

A

creates heat

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16
Q

What color are pressurized oxygen bottles used in aviation?

A

Green

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17
Q

What must be marked on oxygen bottles used in aviation?

A

Aviators Breathing Oxygen

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18
Q

What is produced by liquifying air and boiling off Nitrogen?

A

Oxygen

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19
Q

What is the purpose of a molecular sieve?

A

Produce Oxygen

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20
Q

What is the container that holds liquid oxygen called?

A

Dewar Bottle

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21
Q

Where is the liquid oxygen primarily used?

A

Military aircraft

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22
Q

How is liquid oxygen made?

A

Lowering the temperature

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23
Q

What percent of the air is comprised of oxygen?

A

21%

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24
Q

What is one thing ozone does?

A

Blocks UV rays

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25
Q

How do the ratios of gases change with elevation?

A

No change

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26
Q

What drops as altitude increases?

A

Atmospheric pressure

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27
Q

How do you treat hyperventilation?

A

Calm the person down

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28
Q

What does carbon monoxide smell like?

A

Nothing, it’s odorless

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29
Q

How does carbon monoxide affect the human body?

A

Displaces oxygen

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30
Q

What is the effect of low doses of carbon monoxide over long periods of time?

A

Death

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31
Q

How does a carbon monoxide sticker detector work?

A

changes color

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32
Q

Exhaust shroud heaters may be a source of what?

A

Carbon Monoxide

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33
Q

How can hypoxia be overcome?

A

Increase cabin pressure

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34
Q

What is the primary method of avoiding hypoxia in small aircraft without pressurization?

A

Supplemental Oxygen

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35
Q

Up to what altitude does supplemental oxygen prevent hypoxia?

A

40,000 ft

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36
Q

What is the primary means a large transportation type aircraft prevent hypoxia?

A

Pressurized cabin

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37
Q

What happens when you combine petroleum with oxygen?

A

creates heat

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38
Q

What color are pressurized oxygen bottles used in aviation?

A

Green

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39
Q

What must be marked on oxygen bottles used in aviation?

A

Aviators Breathing Oxygen

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40
Q

What is produced by liquifying air and boiling off Nitrogen?

A

Oxygen

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41
Q

What is the purpose of a molecular sieve?

A

Produce Oxygen

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42
Q

What is the container that holds liquid oxygen called?

A

Dewar Bottle

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43
Q

Where is the liquid oxygen primarily used?

A

Military aircraft

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44
Q

How is liquid oxygen made?

A

Lowering the temperature

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45
Q

What starts oxygen flow after oxygen masks drop?

A

Pull the lanyard

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46
Q

What mixes with oxygen in a diluter demand oxygen system?

A

Cabin air

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47
Q

How do you know that oxygen is flowing to the mask?

A

Flow indicator shows flow

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48
Q

What are high pressure oxygen tubes made of?

A

Stainless Steel

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49
Q

What are low pressure oxygen lines made of?

A

Aluminum

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50
Q

How are oxygen lines marked?

A

Green/White tape band with rectangle bars

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51
Q

What could happen if you raise the pressure in an oxygen system to quickly?

A

Creates heat that could ignite something

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52
Q

What visual indication do you have of thermal discharge of the oxygen system?

A

Green indicator disc blows out

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53
Q

What oxygen system avoids the use of long tubing runs and extra components?

A

Chemical oxygen system

54
Q

What kind of fluid do you use to check for leaks in an oxygen system?

A

Oxygen safe detection fluid

55
Q

This ensures the best chance of sealing oxygen system connections…

A

Torque to specification

56
Q

The cascade method of servicing oxygen systems calls for what?

A

Start with the bottle with the lowest pressure first then work your way up

57
Q

What do you use to seal the threads on flared fittings on oxygen system?

A

Nothing

58
Q

How many inches from moving parts, electrical wires and fluid lines must oxygen system components be?

A

2 inches

59
Q

Barometric pressure does what as altitude increases?

A

Goes down

60
Q

Most flights occur where?

A

Troposphere

61
Q

Cabin altitude is expressed in what units?

A

Feet above sea level

62
Q

Cabin differential pressure is expressed in what units?

A

Pounds per square inch

63
Q

Cabin rate-of-climb is expressed in what units?

A

Feet per minute

64
Q

What does cabin differential pressure measure?

A

Difference in pressure between the cabin and outside ambient air

65
Q

This ensures the best chance of sealing oxygen system connections…

A

Torque to specification

66
Q

The cascade method of servicing oxygen systems calls for what?

A

Start with the bottle with the lowest pressure first then work your way up

67
Q

What do you use to seal the threads on flared fittings on oxygen system?

A

Nothing

68
Q

How many inches from moving parts, electrical wires and fluid lines must oxygen system components be?

A

2 inches

69
Q

Barometric pressure does what as altitude increases?

A

Goes down

70
Q

Most flights occur where?

A

Troposphere

71
Q

Cabin altitude is expressed in what units?

A

Feet above sea level

72
Q

Cabin differential pressure is expressed in what units?

A

Pounds per square inch

73
Q

Cabin rate-of-climb is expressed in what units?

A

Feet per minute

74
Q

What does cabin differential pressure measure?

A

Difference in pressure between the cabin and outside ambient air

75
Q

This ensures the best chance of sealing oxygen system connections…

A

Torque to specification

76
Q

The cascade method of servicing oxygen systems calls for what?

A

Start with the bottle with the lowest pressure first then work your way up

77
Q

What do you use to seal the threads on flared fittings on oxygen system?

A

Nothing

78
Q

How many inches from moving parts, electrical wires and fluid lines must oxygen system components be?

A

2 inches

79
Q

Barometric pressure does what as altitude increases?

A

Goes down

80
Q

Most flights occur where?

A

Troposphere

81
Q

Cabin altitude is expressed in what units?

A

Feet above sea level

82
Q

Cabin differential pressure is expressed in what units?

A

Pounds per square inch

83
Q

Cabin rate-of-climb is expressed in what units?

A

Feet per minute

84
Q

What does cabin differential pressure measure?

A

Difference in pressure between the cabin and outside ambient air
R134

85
Q

An aircraft pressurization system must be capable of maintaining a cabin altitude of ________ ft or lower.

A

8000

86
Q

What can be an issue with pressurized cabin aircraft?

A

Metal fatigue

87
Q

What is a source of air for cabin pressurization in a reciprocating engine aircraft?

A

Turbocharger

88
Q

What is a disadvantage of using a supercharger or turbocharger for cabin pressurization?

A

Takes power from the engine

89
Q

Which source of air pressure is NOT mechanically coupled to the engine?

A

Turbocharger

90
Q

Which type air source for cabin pressure has less risk for carbon monoxide contamination of cabin air?

A

Engine driven compressor

91
Q

What is the source of air for cabin pressurization on turbine engine aircraft?

A

Bleed air

92
Q

What uses the venturi effect to aid air volume into the cabin for pressurization?

A

Jet pump multiplier

93
Q

What mode of cabin pressure control maintains a single cabin pressure despite altitude?

A

Isobaric mode

94
Q

What mode of cabin pressurization maintains cabin pressure at a set differential psi?

A

Constant differential pressure mode

95
Q

What is a typically desirable rate-of-change for cabin pressure?

A

300-500 ft/min

96
Q

The maximum cabin differential pressure of an aircraft is dictated by what?

A

Aircraft design limits

97
Q

The cabin pressure controller sends a signal directly to what component?

A

Pressure regulator

98
Q

All pressurization systems have what feature for override?

A

Manual mode

99
Q

How does an outflow valve maintain a set pressure?

A

It opens, closes and modulates

100
Q

What power source will manually actuate outflow doors?

A

D/C

101
Q

The cabin air pressure safety valve opens when…

A

a predetermined pressure differential is reached

102
Q

Some outflow valves incorporate a safety valve function but you must have what?

A

Two total valves

103
Q

What closes the outflow valve if true cabin pressure drops well below setting pressure?

A

Cabin altitude limiter

104
Q

What ensures outside air pressure does not exceede inside air pressure?

A

Negative pressure relief valve

105
Q

What may be a result of a negative pressure situation?

A

Structural damage

106
Q

What may be used during an abnormal/maintenance or emergency situation to relieve cabin pressure?

A

Dump valves

107
Q

At touchdown the WOW switch sends a signal to do what?

A

Open safety/dump valves

108
Q

What air system has nozzles at each passenger station for ventilating air?

A

Gasper air system

109
Q

What is provided to prevent wear-and-tear on engines and APU for aircraft pressure checks?

A

Ground receptacle for air

110
Q

What type aircraft utilize Air-cycle air conditioning?

A

Turbine engine powered aircraft

111
Q

What is NOT a possible source of air for the air-cycle air conditioning system?

A

Engine exhaust gas

112
Q

What regulates bleed air into the air cycle system?

A

Pack valve

113
Q

What directs bleed air around the ACM to mix with ACM output air to control temperature?

A

Bleed air bypass valve

114
Q

What carries away heat within the primary heat exchanger in an air cycle system?

A

Outside ram air

115
Q

How is air moved through the air cycle primary heat exchanger when on the ground?

A

Fan

116
Q

What are the two components on a common shaft inside an ACM?

A

Compressor and turbine

117
Q

What is the correct sequence of air flow in an ACM system?

A

Primary heat exchanger, compressor, secondary heat exchanger, turbine

118
Q

What item coalesces moisture to remove water from the ACM output air?

A

Fiberglass sock

119
Q

What item prevents water from freezing in the water separator?

A

Refrigeration bypass valve (35 deg valve)

120
Q

What type of air conditioning system operates under the theory of evaporation and condensation?

A

Vapor cycle

121
Q

What is the name of the type of energy that causes a substance to change state?

A

Latent heat energy

122
Q

What type of heat energy raises actual substance temperature?

A

Sensible heat energy

123
Q

Temperature rise above what is required to change freon from a liquid to a vapor is called what?

A

Superheat

124
Q

Temperatures below what is required to change freon from a vapor to a liquid is called what?

A

Subcooling

125
Q

The boiling point is dependent upon what?

A

Pressure

126
Q

What are the two basic sides of a vapor cycle air conditioning system?

A

High and low

127
Q

What side of a vapor cycle air conditioning system gives up heat?

A

High side

128
Q

What side of a vapor cycle air conditioning system receives heat?

A

Low side

129
Q

What two components divide the high side from low side in a vapor cycle air conditioning system?

A

Expansion valve and compressor

130
Q

What type freon is the older type that has been replaced with a newer type?

A

R12

131
Q

What is NOT a hazard of freon?

A

Poisonous

132
Q

What freon type is better for the environment?

A

R134

(Airframes)Cabin Atmosphere Ctrl Sys Airframe and Rain Ctrl Ice and (7 decks)

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