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Module 11B > 11.15 - Oxygen - 4q > Flashcards

11.15 - Oxygen - 4q Flashcards

1
Q

What do Left hand threads on an oxygen system indicate?

A
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2
Q

Describe the operation of the Diluter valve?

A
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3
Q

How is moisture measured in an oxygen system?

A
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4
Q

What is meant by ‘Purging the Oxygen System’?

A
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5
Q

What is the concern if pressure drops below the minimum in the oxygen system?

A
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6
Q

How long is the life of an oxy cylinder?

A
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7
Q

How would you tell if a Chemical generator has discharged?

A
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8
Q

Crew oxygen masks requires what flow? (Volumetric flow)

A
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9
Q

First Aid Oxygen requires what flow?

A
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10
Q

What % extra oxy masks on-board required?

A
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11
Q

Crew fit mask in how long?

A
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12
Q

In terms of pressurisation, at what cabin altitude do the following occur:
-Warning
-Mask drop

A
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13
Q

What is the likely cause if there is no oxy pressure but bottle is at 1800 psi?

A
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14
Q

What are oxygen masks left plugged into and why?

A
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15
Q

The oxy. shut-off valve is wired what way? (default position)

A

i.e energised closed, in case wire brakes - opens circuit no longer energising closed and shut-off valve goes to default -open position

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16
Q

How is inadvertent mask drop avoided?

A
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17
Q

If the masks deploy, how is the crew notified?

A
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18
Q

Oxygen is required to be how pure?

A
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19
Q

What does the Aneroid capsule do?

A
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20
Q

Oxygen flow is controlled relative to cabin pressure …?

A
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21
Q

How can leaks be stopped in a system?

A
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22
Q

Aluminium should be used to construct what type of pipes?

A
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23
Q

What is the bag on passenger mask?

A
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24
Q

What pressure should crew oxygen be?

A
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25
Q

What is meant by ‘Demand Oxygen’?

A
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26
Q

If the Mask automatically deploys, what is followed in the cockpit?

A
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27
Q

Unpressurised A/C = ?

A
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28
Q

What comes after Hypoxia?

A
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29
Q

PSU oxgen = ? (time period)

A
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30
Q
A

passed into the bottle slowly to keep the temperature at approximately ambient

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31
Q
A

Charging connection

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32
Q
A

user breathes in

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33
Q
A

a hygrometer using the dew point method

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34
Q
A

Green rupturing disc

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35
Q

Purging oxygen systems is carried to?
a) Purify the system and rid it of moisture
b) Ensure correct operation of the oxygen system
c) Remove water from the system

A

a) Purify the system and rid it of moisture

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36
Q

If oxygen bottle pressure is allowed to drop below a specified minimum, it may cause?
a) Moisture to collect in the bottle
b) The pressure reducer to fail
c) The automatic altitude control valve to fail

A

a) Moisture to collect in the bottle

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37
Q
A

5 years

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38
Q

Chemical oxygen generator in a Passenger service Unit can be checked for deployment which means:
a) by checking the oxygen pressure gauge in the cockpit
b) by a pressure switch on the chemical oxygen generator
c) the observation of a band around the generator for discolouration

A

c) the observation of a band around the generator for discolouration

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39
Q

Crew must be provided with Oxygen masks to combat smoke and fires so that they provide:
a) 5 Litres per minute
b) 30 Litres per minute
c) 50 Litres per minute

A

b) 30 Litres per minute

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40
Q

First aid oxygen would normally be required to provide:
a) 4 Litres per minute
b) 10 Litres per minute
c) 30 Litres per minute

A

a) 4 Litres per minute

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41
Q
A

10%

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42
Q
A

5 seconds

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43
Q

Oxygen masks will normally deploy (depends on aircraft) at a cabin altitude of:
a) 10,000 feet
b) 14,000 feet
c) 20,000 feet

A
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44
Q
A

Cant be stopped

45
Q
A

by the operation of a pressure sensitive diaphragm

46
Q

During a routine pre flight check after A/C maintenance, there is no oxygen pressure to mask although the oxygen bottle pressure is 1800 PSI. What could be the cause;
a) This is normal because oxygen to the quick-donning harness is only supplied above 10000 ft
b) The oxygen bottle shut-off valve has not been reopened
c) The overboard discharge has been activated, the green indicator disc on the fuselage is missing

A

b) The oxygen bottle shut-off valve has not been reopened

47
Q
A

Whilst wearing an Oxygen mask

48
Q

Oxygen masks are left plugged into the regulator;
a) To prevent leaks from the regulator
b) For storage requirements
c) To enable the mask to operate as soon as it is fitted

A

c) To enable the mask to operate as soon as it is fitted

49
Q
A

To facilitate removal and installation

50
Q

In what position should the shutoff valve to the crew oxygen system be in for flight
a) Wire locked shut
b) Wire locked open
c) In the position selected by the crew

A

b) Wire locked open

51
Q
A

Pull down on their mask

52
Q
A

A guarded switch

53
Q

What stops inadvertent operation of drop-out oxygen equipment:
a) A switch and manual handle are guarded
b) There is nothing to stop inadvertent operation
c) The switch is in a hidden position

A

a) A switch and manual handle are guarded

54
Q
A

Must be 99.5% pure

55
Q
A

An aneroid capsule

56
Q

Oxygen flow is controlled relative to cabin altitude on a pneumatically operated system by:
a) an aneroid capsule which is exposed to cabin pressure
b) cabin pressurisation system
c) A valve on the oxygen bottle

A

a) an aneroid capsule which is exposed to cabin pressure

57
Q

It is suspected that leaks have developed in the aircraft’s oxygen system. Consequently, lines and fittings should be checked by:
a) Applying a coating of a neutral cleaning solvent on all suspected areas, as any leaks would cause the solvent to spread noticeably
b) Checking the tightness of all fittings with a torque wrench
c) Bubble testing, using a soap solution manufactured specifically for this purpose

A

c) Bubble testing, using a soap solution manufactured specifically for this purpose

58
Q
A

A non return valve

59
Q

Cockpit oxygen set to normal, oxygen is supplied to the mask only when the user breath in by the action of:
a) a diaphragm deflected by reduction of pressure
b) a shutoff valve in the mask
c) The operation of a on/off switch

A

a) a diaphragm deflected by reduction of pressure

60
Q
A

Light aluminium alloy

61
Q
A

To provide an oxygen reservoir

62
Q

How is the crew oxygen system protected against overpressure
a) The LP supply valve closes automatically if the supply pressure to the oxygen mask stowage boxes exceeds the limit
b) Oxygen will be discharged overboard if the pressure in the oxygen cylinder or low pressure supply system exceeds the limit
c) The flow indicator indicates over pressure in the oxygen mask

A

b) Oxygen will be discharged overboard if the pressure in the oxygen cylinder or low pressure supply system exceeds the limit

63
Q
A

Flows when inhaling

64
Q

Why would the pilot select 100% at the oxygen panel:
a) If the aircraft was pressurised
b) If the aircraft was full of smoke and fumes
c) If the aircraft was descending quickly

A

b) If the aircraft was full of smoke and fumes

65
Q
A

Allow time for heat to dissipate

66
Q
A

It provides a constant flow of oxygen, by-passing regulator

67
Q

During flight the passenger oxygen masks automatically deployed. Which of the following additional events, if true, would indicate that the deployment was genuine:
a) A pack trip off light illuminating in the flight compartment
b) A pack smoke light illuminating in the flight compartment
c) A cabin altitude aural warning sounding in the flight compartment

A

c) A cabin altitude aural warning sounding in the flight compartment

68
Q
A

Continuous flow type

69
Q

Passenger Oxygen systems in unpressurised aircraft are generally of the:
a) Continuous flow type and diluter demand types
b) Continuous flow type
c) Diluter demand operated by a pressure switch

A

b) Continuous flow type

70
Q
A

1/ A diluter demand oxygen system for the flight crew

71
Q
A

3/ Has a lower water content

72
Q
A

1/ Green

73
Q
A

2/ Cabin air

74
Q
A

1/ Green

75
Q
A

3/ Increasing the oxygen ratio, by the demand valve, if the cabin altitude increases

76
Q
A

3/ the observation of a tell band around the generator body

77
Q
A

2/ On/Off manual valve

78
Q
A

1/ to pressurize the cabin

79
Q
A

b) lack of oxygen and comes after hypoxia

80
Q
A

a) 15 min

81
Q
A

b) may be stamped on the neck of the cylinder

82
Q
A

c) Breathing Regulator is faulty

83
Q
A

b) additional flight crew use

84
Q
A

a) pressure gauge

85
Q
A

b) when breathing in

86
Q
A

b) prevent an overheat when oxygen is flowing

87
Q
A

b) green in colour with a LH thread

88
Q
A

a) O2

89
Q
A

a) 1800 PSI

90
Q
A

a) turned on and safety wirelocked open

91
Q
A

b) passed into the bottle slowly to keep the temperature at approximately ambient

92
Q
A

c) user breathes in

93
Q
A

c) a hygrometer using the dew point method

94
Q
A

a) Green rupturing disc

95
Q
A

b) 5 years

96
Q
A

b) a change in colour on the band

97
Q
A

b) 30 Litres per minute

98
Q
A

a) 4 Litres per minute

99
Q
A

c) 10%

100
Q
A

c) 5 seconds

101
Q
A

b) 14,000feet

102
Q
A

c) Cant be stopped

103
Q
A

1/ 1800-1850 psi

104
Q
A

3/ Flows when inhaling

105
Q
A

2/ If the aircraft was full of smoke and fumes

106
Q
A

2/ Allow time for heat to dissipate

107
Q
A

3/ It provides a constant flow of oxygen, by-passing regulator.

108
Q
A

2/ the aneriod capsule

109
Q
A

1/ both normal and low flow is sometimes needed

Module 11B (42 decks)

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