Chapter 13: Water and Waste Management Flashcards
subsystems of potable water system
1) storage & distribution
2) water quantity indication
3) water heating
subsystem of waste disposal system
1) gray water drain system
2) vacuum waste system
what pressure are the water tanks pressurised at and sources of pressure
40 psi
compressed air / engine bleed air
what does the overhead distribution line do?
supply water to lavatories and galleys
where does isolation/drain valves located at?
forward part of system: isolation/drain
aft part of system:
isolation
3 drain valves
1) forward system drain
2) aft system drain
3) tank drain
what functions does the fill overflow valve have?
1) water flow into tank
2) air vents as water flows in
3) closes when water fills to selected level
4) water flow overboard if overfill
5) air supply to water tank is off
what does the water quantity indication system do?
uses water quantity transmitter in tank to indicate water quantity on control panels
what does the gray water drain system permit?
waste water to be drained overboard through forward/aft drain mast
what does a gray water drain restrictor valve do?
limit amount of air that flows out of plane (reduce noise in lavatory and galley)
how much waste can the forward mid and aft tanks hold?
forward & mid: 314 litres
aft: 239 litres
what do continuous level sensors do?
calculate amount of waste in tank
data shown to cabin control panels
what type of sensor is continuous level of?
capacitance-type pressure sensor
what does the point level sensor do?
sends signal to logic control module when tank is full
waste tank quantity indication system sensors
point level sensors, continuous level sensors, logic control modules
