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Module 11B > 11.17 - Water & Waste - MCQ > Flashcards

11.17 - Water & Waste - MCQ Flashcards

1
Q
A

heated on the ground and in the air

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2
Q
A

Prevent motor overheating and become fire hazard

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3
Q
A

28 V dc on ground and 115 V ac in flight

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4
Q
A

Physically feeling for mast element heating operation

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5
Q
A

pneumatic pressure

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6
Q
A

Toilet waste

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7
Q
A

Vacuum blower

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8
Q
A

thermal protection

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9
Q
A

between 25 and 50 psi

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10
Q
A

1.5 litres

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11
Q
A

wrapping the pipes with heated tapes or ribbons

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12
Q
A

are heated using low amperage in the Air and on ground

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13
Q
A

spring-loaded closed

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14
Q
A

Limits the case temperature to approx. 82^C

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15
Q
A

The unit is on and the water is heating

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16
Q
A

Capacitance

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17
Q
A

Prevent cabin air leaks through drain lines

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18
Q
A

Vacuum generator

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19
Q
A

To vent the toilet tank

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20
Q
  1. The flush sequence is controlled by an electric circuit and Normally lasts for around ? seconds
A
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21
Q
A

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

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22
Q
A

Operate with 115 V AC, 3 phase power

23
Q
A

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

24
Q

The normal source for water tank pressurisation is:

1/ A compressor
2/ The pneumatic system
3/ Ram air

A

2/ The pneumatic system

25
Q

Toilet bowls are normally manufactured from:

1/ Stainless steel coated with Teflon
2/ Composite material
3/ Aluminium

A

1/ Stainless steel coated with Teflon

26
Q

Galley tie rods or cables are used to:

1/ Support the galley clear of the floor
2/ Prevent galley movement in flight
3/ To restrain galley cart movement

A

2/ Prevent galley movement in flight

27
Q

What does illumination of the water heater light indicates:

1/ Normal operation
2/ An overheat condition
3/ The water temperature is low

A

1/ Normal operation

28
Q

Chillers cool the areas of the galley by:

1/ Pumping Freon through cool boxes
2/ Pumping refrigerant through ducts to the galley
3/ Supplying cool air around the galley area in ducts

A

3/ Supplying cool air around the galley area in ducts

29
Q

What waste water is not jettisoned overboard:

1/ the galley waste
2/ the toilet waste
3/ the sink water

A

2/ the toilet waste

30
Q

The water tank is located:

1/ outside the pressure shell only
2/ inside the pressure shell
3/ either side of the pressure shell

A

2/ inside the pressure shell

31
Q

If no lights illuminate on the water indicator when pressed:

1/ the tank is empty
2/ the tank is full
3/ there is no power to the indicator

A

3/ there is no power to the indicator

32
Q

Drain mast heaters are powered

1/ on the ground only
2/ when the heaters are manually switched on
3/ when the aircraft electrical system is on

A

3/ when the aircraft electrical system is on

33
Q

Overheating of a flush motor could occur if the:

1/ toilet is operated with no pre-charge liquid
2/ toilet is continuously flushed
3/ the rinse ring is blocked

A

1/ toilet is operated with no pre-charge liquid

34
Q

What may cause the flush motor to overheat in a self contained/ container type toilet system:

1/ flush timer switching out late
2/ reverse relay not working
3/ no water in the toilet

A

3/ no water in the toilet

35
Q

What would prevent a potable water service panel from closing correctly:

1/ To fill and vent valve handle in the fill position
2/ the drain valve handle in the drain position
3/ both a and b are correct

A

3/ both a and b are correct

36
Q

In the cruise phase of flight, the energy required to transport the waste material from the toilet bowl to the waste tank of a vacuum toilet system is provided by:

1/ the vacuum blowers
2/ cabin/ambient differential pressure
3/ the inertial/gravity forces of the flush water and waste material

A

2/ cabin/ambient differential pressure

37
Q

Water pipes are heated

1/ always, for their complete length
2/ never
3/ in cold fuselage areas when electrical power is on

A

3/ in cold fuselage areas when electrical power is on

38
Q

If no lights illuminate on the potable water level indicator when pressed:

the tank is empty
the tank is full
there is no power to the indicator

A

there is no power to the indicator

39
Q

What should normally done to the Potable water system when an aircraft is to be parked up for a few days,

the water should be treated with an antifreeze
the water should be drained
the water should remain heated

A

the water should be drained

40
Q

Where is the main hot water tank on the aircraft:

there is none
it is in the freight hold beside the cold water tank
there is no hot water in an aircraft

A

there is none

41
Q

Toilet waste container compartment is sealed and is protected by a Freon fire bottle
The bottle is fired by a switch in the vanity unit
A manual trigger is activated on the bottle
It automatically fires when heat is detected in the compartment

A

It automatically fires when heat is detected in the compartment

42
Q

The area around the toilet bowl is?
Sprayed with deodorant in flight
A venture is used to remove stale air
Air is blown around the bowl from the gasper fan

A

A venture is used to remove stale air

43
Q

The Toilet Water Heat supplies.
3 Litres of water at 45deg C
4 Litres of water at 60deg C
1.5 Litres of water at 45deg C

A

1.5 Litres of water at 45deg C

44
Q

What protect the waste motor from going on fire.
Water is sprayed around the motor
The circuit breaker will trip
Overheat switches in the motor

A

Overheat switches in the motor

45
Q

Question Number. 1. Toilet flush motor is protected from overheat by.
Option A. thermal protection.
Option B. water cooling.
Option C. cooling fan on timer switch.

A

Option A. thermal protection.

46
Q

Question Number. 2. What is the purpose of thermal protection on electric toilet motor?.
Option A. Prevent motor overheating and become fire hazard.
Option B. Prevent toilet freezing.
Option C. Stop motor running beyond 10 seconds if timer become unserviceable.

A

Option A. Prevent motor overheating and become fire hazard.

47
Q

Question Number. 3. Waste water drain masts.
Option A. are not heated.
Option B. are heated using low amperage in the Air and on ground.
Option C. are heated using low amperage with the aircraft on ground only.

A

Option C. are heated using low amperage with the aircraft on ground only.

Explanation. 737 AMM ch. 30-71 28VAC on ground and 115VAC in air.

48
Q

Question Number. 4. the seal of the valve is replaceable without draining the tanks.
Option A. the seal of the valve is replaceable without draining the tanks.
Option B. the tank must be de-fuelled.
Option C. the seal is not replaceable, the whole drain assembly must be replaced.

A

Correct Answer is. the seal of the valve is replaceable without draining the tanks.

49
Q

Question Number. 5. Drinking water pipes are prevented from freezing by.
Option A. installation of neoprene foam insulation.
Option B. wrapping the pipes with heated tapes or ribbons.
Option C. placing the pipes adjacent to hot water piping.

A

Option B. wrapping the pipes with heated tapes or ribbons.

50
Q

Question Number. 6. Toilets are the subject of.
Option A. AWN 83.
Option B. AWN 79.
Option C. AWN 80.

A

Option A. AWN 83.

51
Q

Question Number. 7. Toilet waste valves are.
Option A. not spring loaded.
Option B. spring loaded open.
Option C. spring loaded closed.

A

Option C. spring loaded closed.

52
Q

Question Number. 8. The heater used on a drain mast would be a.
Option A. induction heater.
Option B. hot air blower.
Option C. ribbon heater.

A

Option C. ribbon heater.

53
Q

Question Number. 9. A toilet recirculation fan is unserviceable in flight.
Option A. Close toilet until landing.
Option B. You can use the toilet as the toxic chemical toilet.
Option C. It can be overcome by thermal compensating device.

A

Option A. Close toilet until landing.

Module 11B (42 decks)

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