11.17 Water And Waste Flashcards Preview

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Flashcards in 11.17 Water And Waste Deck (33)
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1
Q

What are the 3 water subsystems?

A
  • Potable water
  • waste water
  • toilet waste systems
2
Q

What does the potable water system supply? [2]

A
  • Toilets

- galleys

3
Q

What are the potable water tanks made out of?

A

Glass fibre reinforced plastic

4
Q

Where are the portable water tanks located?

A

Pressurised under floor area of the fuselage

5
Q

What does a mixer valve do in the lavatory water system?

A

Mixes a supply of cold water from the header and hot water from the water heater

6
Q

What types of faucets are there? [2]

A
  • Mechanical

- infrared faucets

7
Q

What components can be found in a lavatory water system? [5]

A
  • Header to distribute water
  • Manual shut off valve
  • Water heater
  • Mixer valve
  • Washbasin with faucets
8
Q

How is the infrared faucet controlled?

A

By reflective sensor units with 2 lenses,

The reflective sensor opens a solenoid operated shut off valve on the mixer unit

9
Q

How much water can a water heater hold?

A

Approx 3 pints

10
Q

What components can be found on the water heater? [4]

A
  • Manual on/off switch,
  • Indicating light,
  • Pressure relief valve
  • Over heat switch
11
Q

At what temperature will the overheat switch open in the water heater?

A

90 degree c

12
Q

At what pressure does the pressure relief valve open on the water heater?

A

140 psi

13
Q

What is used to pressurise the potable water system? [2]

A
  • Bleed air from pneumatics

- or electrical air compressor when pneumatics unavailable

14
Q

At what psi will the pressure switch close to activate the electrical air compressor?

A

30 psi

15
Q

Where can the water service panel be found?

A

Lower part of the fuselage in a recess

16
Q

What are the main components of the water service panel? (4)

A
  • T-handle
  • a fill fitting with protective cap
  • water quantity indicator
  • air compressor interlock switch
17
Q

What is quantity detection controlled by?

A

Quantity control unit

18
Q

Where Is the waste from the toilet collected?

A

In waste tanks

19
Q

Where does the waste water from the galleys and washbasins go?

A

Out of the aircraft through drain lines and drain masts

20
Q

What two types of toilet waste systems are there?

A
  • Vacuum

- Flush motor toilets

21
Q

What are the main components for a flush motor toilet? [4]

A
  • Flushing equipment with flush handle
  • Flush motor assembly
  • Waste tank
  • Drain equipment
22
Q

What is found in the flush motor assembly?

A

Impeller pump

23
Q

What does the impeller pump do?

A

Pumps liquid from the tank through filter basket to spray on the toilet bowl

24
Q

What powers the flush motor?

A

3 phase electric motor

25
Q

What is positioned on the flush motor assembly to prevent clogging of the filter?

A

A wiper blade

26
Q

How many times can the flush motor toilet be used for?

A

Approx 100 times

27
Q

What is the valve called that prevents back flow of water from the toilet to the potable water system?

A

Anti siphon valve

28
Q

How is the waste transported from the toilet to the waste tank?

A

By differential pressure generated by the vacuum system

29
Q

What does the waste tank have to indicate waste levels

A

Level sensor

30
Q

On the water panel, what will you find? [2]

A
  • Drain fitting

- drain valve handles for each individual tank

31
Q

What does the safety valve do on the water panel?

A

Prevents leakage of waste from a fault drain valve

32
Q

How would you drain a waste tank?

A
  • Attach the line from the service cart,
  • open the safety valve,
  • Pull the drain valve handle opening the drain valve
33
Q

What must you Do when you have drained a tank?

A

Flush it with clean water