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Module 11B > 11.17 - Water & Waste - 4q > Flashcards

11.17 - Water & Waste - 4q Flashcards

1
Q

Flush motor on a re-usable liquid type toilet is what and why?

A
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2
Q

What happens when the waste tank becomes full?

A
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3
Q

What electrical power does the flush motor use?

A
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4
Q

How is the flush motor potected from over heat?

A
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5
Q

When replacing the seal of the valve, are the tanks required to be drained?

A
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6
Q

Toilets are subject to AWN ?

A
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7
Q

Waste valves are spring loaded in what config?

A
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8
Q

Drain masts use what to prevent freezing up?

A
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9
Q

What material are toilet bowls made from?

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10
Q

How is movement of the galley prevented?

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11
Q

A light on the water heater indicates what?

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12
Q

What do Chiller coolers do?

A
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13
Q

Why would the flush motor overheat?

A
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14
Q

In flight, what pressure flushes the toilet?

A
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15
Q

Area around the toilet, what is used to remove stale air?

A
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16
Q

Water heater = (volume/temp.)

A
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17
Q

What volume capacity is required for each of the following:
* Short range
* Mid range
* Long range

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18
Q

Tank pressure = ? psi

A
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19
Q

Overheat
When the case is at ? temp, what action required?

A
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20
Q

Why are service panels heated?

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21
Q

Below 16,000 ft, what is used to flush the toilet?

A
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22
Q

How long does the flush sequence last?

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23
Q

Level Sensor
What happens when the sensor becomes dirty (fouled)?

A
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24
Q

What type of thermal switch is contained within a Vacuum blower?

A
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25
Q

The Vacuum system controller requires what?

A
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26
Q

What 2 sensors are contained within the Waste tank?

A
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27
Q

How is waste water entering the potable water prevented?

A
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28
Q

In a self contained toilet system, how is fouling of the flush pump prevented?

A
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29
Q

What does the drain flapper do in a self contained system?

A
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30
Q

What is the main system processor used for a vacuum toilet?

A
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31
Q
A

heated on the ground and in the air

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32
Q
A

Prevent motor overheating and become fire hazard

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33
Q
A

28 V dc on ground and 115 V ac in flight

34
Q
A

Physically feeling for mast element heating operation

35
Q
A

pneumatic pressure

36
Q
A

Toilet waste

37
Q
A

Vacuum blower

38
Q
A

thermal protection

39
Q
A

between 25 and 50 psi

40
Q
A

1.5 litres

41
Q
A

wrapping pipes with heated tapes or ribbons

42
Q
A

are heated using low amperage in the Air and on ground

43
Q
A

spring-loaded closed

44
Q
A

Limits the case temperature to approx. 82^C

45
Q
A

The unit is on and the water is heating

46
Q
A

Capacitance

47
Q
A

Prevent cabin air leaks through drain lines

48
Q
A

Vacuum generator

49
Q
A

To vent the toilet tank

50
Q

The flush sequence is controlled by an electric circuit and Normally lasts for around _____________

A

10 seconds

51
Q
A

prevents water from being drawn back into the potable water system from the rinse header

52
Q
A

Operate with 115V AC, 3 phase power

53
Q
A

In the passenger compartment or area below the cabin floor in pressurised area

54
Q
A
55
Q

Why is the potable water system insulated?

A

The system is insulated to prevent water leaks and ice build-up

56
Q

Potable water system pressure?

A

25 - 35 PSI

57
Q

Where are the potable water tanks commonly installed?

A

The tanks are commonly in the pressurised zone of the fuselage, installed below the cabin floor

58
Q

How does the potable water system maintain pressure on the ground? (when not pressurised)

A

On ground, when not pressurised, the system holds the pressure by means of check valves

59
Q
A
60
Q
A
61
Q

Hot water to the taps passes through an in line electrical water heater. The heaters aare provided with thermostats that regulate the water outlet to approximately ? ^C

A

45^C

62
Q

If overheat occurs in the in line electrical water heater, the switch does what?

A

If overheat occurs, the switch interrupts power to the heater and light

63
Q

Does the light in the electrical in line heater indicate the water is hot?

A

No, the light does not indicate that the water is hot

64
Q

How is over pressurisation in water tanl prevented?

A

A pressure relief valve prevents tank over-pressurisation

65
Q

Toilet vacuum flushing systems are supplied with what type of water

A

Toilet vacuum flushing systems are supplied with potable water for rinsing the toilet bowl, via a spray ring?

66
Q

Because servicing panels are installed in the outside fuselage skin, they are ?

A

normally heated to prevent ice build-up due to leaking water

67
Q

To fill the potable water tank, what position should the handle be in located on the water service panel?

A
68
Q

Other quantity transmitters in the water tank quantity indication operate as?

A

Variable capacitor

69
Q

Overboard wastewater systems
Why are drain masts heated?

A

Drain masts are heated to prevent freezing in flight and during winter operation

70
Q

Overboard wastewater systems
How is cabin air pressured leakage prevented?

A

Under each sink, a float valve prevents a leakage of the cabin air pressure through the drain lines

71
Q

How is wastewater discarded in flight vs on the ground?

A

The pressure difference between the cabin and the atmosphere discards the wastewater through the drain masts in flight.

Gravity discards the wastewater through the drain masts on the ground

72
Q

The drain masts have integrated ? to prevent the water freezing during high altitude flights/during cold weather

A

electrical ribbon type heating elements

73
Q

Are the drain masts heated on the ground? and if so with what supply

A

They are heated on the ground.
(Usually with 24 V DC ) but the current and heat temperature is reduced

74
Q

Normally, differential pressure forces waste from toilet bowls into waste storage tanks.

However below what altitude ? is it done differently and what is this method

A

On the ground, and at altitudes below 16,000 feet, a vacuum generator produces the necessary pressure differential

75
Q

While airborne, how is the water sysem pressurised?

A

bWhile airborne, the aircraft uses bleed air to pressurize the water system; on the ground it uses air from the service panel pressure port

76
Q

The flush sequence is controlled by an electric circuit, and normally lasts for around ?

A

10 seconds

77
Q

Why should you not flush the toiet is the tank is empty?

A

overheating could occur to the pump

78
Q

On ground and below 16,000 ft (4,850 m), ? generate the required pressure differential

A

high-speed blowers

79
Q

Waste holding tank
A ‘tank full’ signal will do what?

A

A ‘tank full’ signal will disable the toilets connected to that tank and provide an indication

80
Q

Waste Holding Tank Level Sensors
What happens if the sensor becomes fouled/dirty?

A

Should the point level sensor become ‘fouled’ (dirty) a signal will illuminate a ‘‘SENSOR FOULED’’

81
Q

Why might automatic shut down of Vacuum blowers occur>

A

Automatic resetting thermal switches in the motor windings will shut down the motor at a given temperature

Module 11B (42 decks)

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