11.17 - Water & Waste

Toilet flush motor is protected from overheat by
a) thermal protection
b) water cooling
c) cooling fan on timer switch

a) thermal protection

What is the purpose of thermal protection on electric toilet motor?
a) Prevent motor overheating and become fire hazard
b) Prevent toilet freezing
c) Stop motor running beyond 10 seconds if timer become unserviceable

a) Prevent motor overheating and become fire hazard

Waste water drain masts
a) are not heated
b) are heated using low amperage in the Air and on ground
c) are heated using low amperage with the aircraft on ground only

b) are heated using low amperage in the Air and on ground

Drinking water pipes are prevented from freezing by
a) installation of neoprene foam insulation
b) wrapping the pipes with heated tapes or ribbons
c) placing the pipes adjacent to hot water piping

b) wrapping the pipes with heated tapes or ribbons

Toilets are the subject of
a) AWN 79
b) AWN 80
c) AWN 83

c) AWN 83

Toilet waste valves are
a) not spring loaded
b) spring loaded open
c) spring loaded closed

c) spring loaded closed

The heater used on a drain mast would be a
a) induction heater
b) hot air blower
c) ribbon heater

c) ribbon heater

A toilet recirculation fan is unserviceable in flight
a) Close toilet until landing
b) You can use the toilet as the toxic chemical toilet
c) It can be overcome by thermal compensating device

a) Close toilet until landing

When the red indicating light on a toilet compartment water heater is illuminated, its an indication that the
a) heater has tripped off due to overheat
b) cyclic thermal switch has opened
c) heater is switched on and operating normally

c) heater is switched on and operating normally

In flight, potable water system storage tanks are pressurised with air from
a) an electric motor driven compressor
b) the low pressure bleed air pneumatic system
c) the pressurised cabin

b) the low pressure bleed air pneumatic system

A riser loop would be installed in a potable water system
a) distribution line to prevent air locks
b) air pressurisation lien to prevent water entering the air compressor
c) overflow line to prevent siphoning

b) air pressurisation lien to prevent water entering the air compressor

The stack pipe in a potable water storage tank is connected to the
a) overflow line
b) drain line
c) fill line

a) overflow line

Electrical motors in liquid flush toilets must be fitted with a
a) waterproof cover
b) rectifier
c) thermal protection device

c) thermal protection device

A safety plug/safety valve is installed in a toilet waste drain fitting to prevent
a) inadvertent drainage
b) odours escaping into the atmosphere
c) ground service panel being closed while the drain valve is open

a) inadvertent drainage

Vacuum breakers in a vacuum toilet system prevent
a) a vacuum forming in the waste bowl while in use
b) water from the bowl rinse line siphoning back into potable water system
c) a continuous loss of cabin pressure when the toilet not in use

b) water from the bowl rinse line siphoning back into potable water system

Electric driven motor operates
a) at low altitudes when a toilet is flushed
b) continuously at low altitudes
c) at high altitudes when a toilet is flushed

a) at low altitudes when a toilet is flushed

Potable water system is sterilised with water and chemical disinfectant
a) that remains in the system in service
b) that is drained and flushed before refilling with clean water
c) is left in the system when the A/C is parked for extended periods of time

b) that is drained and flushed before refilling with clean water

Overboard masts are used to dump
a) wastewater from potable water system drains only
b) overspill from lavatory waste tanks only
c) wastewater from potable water system drains and overspill from lavatory waste tanks

a) wastewater from potable water system drains only

Pre-charge solution is used in
a) vacuum and liquid toilet waste tanks
b) vacuum toilet only
c) liquid flush toilet only

c) liquid flush toilet only

Fluid used to rinse a vacuum toilet bowl is drawn from
a) waste tank
b) header tank
c) potable water system

c) potable water system

Lavatory bowl is manufactured from
a) aluminium alloy
b) stainless steel
c) fibreglass

b) stainless steel

Potable water tank contents indicator on cabin panel is powered:
a) all the time power is on the A/C
b) only when the ground service panel door is opened
c) when the override button on the attendant's indicator panel is pressed

c) when the override button on the attendant's indicator panel is pressed

Potable water samples are taken from
a) the faucets furthest from the storage tank
b) storage tank drain line
c) washbasin drain lines

a) the faucets furthest from the storage tank