11.17 Water/ Waste Flashcards
The portable water is stored in water tanks, what are they made from?
Glass fibre reinforced plastic
Where are the portable water tanks located?
In the pressurised underfloor area of fuselage
The temperature adjustment knob allows what temperature of warm water?
From 26 degrees to 43 degrees
In each lavatory there is a faucet assembly, what does this do?
Gives a flow of hot or cold water/ mixture
How do we isolate the water supply if there is a leakage?
Manual shut off valve
What provides hot water to the water basin?
The water heater
When does the pressure relief valve open automatically?
When the pressure in the heater increases to more than 140psi
The portable water system needs pressurisation, where is this supplied from?
Bleed air from pneumatic system
How do you prevent dirty air supply entering the portable water system?
Air filter in both supply lines
How is the servicing in the portable water system done?
From a water service panel
How does the quantity detection work?
Controlled by quantity control unit
What two sub systems does the water disposal system have?
. Waste water system
. Toilet waste system
How many central waste tanks does a vacuum toilet system have?
2 or more
In cargo compartment area
In a vacuum toilet system how long does the motor operates flush valve open for?
4 seconds and the waste goes to the tank
What does the anti - solienoid valve do?
Is a check valve that prevents back flow of water from the water into the portable water system
What does the water separator do?
Removes moisture and waste particles from waste tank air before vented overboard
The toilet basket motor is kept clean how?
By rotating
What is the infared falcet controlled by?
A reflective sensor unit with two lenses
What is the main water supply system in aircraft?
Potable water system
What are the two different ways a faucet is controlled?
. Mechanically
. Infrared controlled
What is the infrared faucet controlled by?
Reflective sensor unit with two lenses
How long will the water flow last till it is stopped?
3-15 seconds
At what temperature does the overheat switch open when water gets above?
90 degrees C
What is used to pressurise the water systems?
Bleed air from pneumatic system
How do you prevent air compressor during servicing?
When access door is opened the interlock switch is operated which prevent air compressor
What does the water quantity transmitter use to measure quantity of water in tanks?
By capacitance probes
What phase is a flush motor?
3 phase electric motor
On a vacuum toilet what does the flush control unit do?
Sprays water from potable water system into toilet bowl for 1 second
When the tank is completly drained how much clean water do you need to flush it with?
5-10 US gallons of clean water
On a water heater there are 3 levels of temperature what are they?
Low - 38 degrees C
Medium - 44 degrees C
High - 52 degrees C
