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WorksheetsDomestic Cold Water 6035-02 | Part 2
Total questions: 40
Worksheet time: 20mins
What component must be sited immediately after the supply stop valve on entry to a property?
Single check valve
Ferrule valve
Drain off valve
Service valve
What type of valve should be installed in order to isolate the CWSC?
Service valve
Float operated valve
Gate valve
Stop valve
If the service pipe is located within 750mm of the outside wall, what action should be taken?
Contact the Water Undertaker
Reposition pipework further than 750mm
Reposition the wall so the pipework is further than 750mm
Insulate the pipework
Limescale is created by what mineral being in temporary hard water?
Calcium carbonate
Sodium
Soft water
Calcium sulphate
What pipes is the Water Undertaker responsible for maintaining?
Communication pipes
Service pipes
Both pipes
None of the pipes
Which of the following is NOT known as a "Underground sources" of water?
Wells
Borehole
Springs
Streams
What item should be used to test the PPM in water?
Weir cup
Pressure gauge
Flow cup
Hardness test kit
If cold water at all outlets mains fed but a CWSC is located in the loft space, what system does the property have?
Direct system with combination boiler
Direct system with gravity fed to hot water only
Indirect system with gravity fed to cold and hot water
Indirect system with gravity fed to hot water only
Which of the following is NOT a disadvantage to an indirect system?
A stored supply of water
More expensive
Possible contamination
Only one potable draw-off point
Which of the following appliances does a grey water system supply water to?
Washing machine
Bath/Shower
WC
Basin
A disadvantage to only having a rainwater system would be?
Help on increasing 'green' demand in society
A rain drought would leave WC without water
Lowers your water bills
Easy install on new builds
Which of the following is NOT a way of identifying the system installed within a property?
Taking pressure readings at outlets
Identifying the cistern sizes in the loft
Opening all taps throughout the property at once
Which outlets still have a water supply after mains is turned off
STATEMENT: Oil-based compound is required on tank connectors governed by the Water Regulations 1999.
True
False
Where would you find a fullway gate valve installed?
Incoming mains
Lowest points in the system
Overflow pipe
Cold feed pipe
What tool should used to make the connections for a CSWC?
Hole saw
Plastic drill bit
Dimension saw
None. The connection holes are already drilled
STATEMENT: A wooden pallet would suffice for supporting the base of the CWSC, as long as it is wider than the cistern.
True
False
Head height of the CWSC is 6m, what pressure would be exerted? 6m x 9.81N/m²(10N/m²)
49.05kN/m²
58.86kN/m²
68.67kN/m²
70kN/m²
What BS number covers FOVs(Float Operated Valves)?
BS6700
BS1200
BS1234
BS1212
What FOV is also known as a 'Portsmouth' valve?
BS1212 Part 1
BS1212 Part 2
BS1212 Part 3
BS1212 Part 4
Which of the following FOV's does NOT contain a 'piston' component?
BS1212 Part 1
BS1212 Part 2
BS1212 Part 3
BS1212 Part 4
Which of the following causes does NOT occur due to water hammering?
Loose jumper in the stop valve
Reduced pressure at the service valve
Pipe not fixed correctly
Blocked float operated valve
A single check valve on the hot and cold pipe to a basin would protect fluid category 1 from?
Category 2
Category 3
Category 4
Category 5
Double check valves are installed to protect what fluid category from category 3 water?
Category 5
Category 4
Category 2
Category 1
Which of the following does NOT protect wholesome water with a 'AIR GAP'?
Shower hose
Outside bib tap
Kitchen sink
CWSC
The AG air gap is maintained on which of the following?
WC pan
WC cistern
Basin
Sink
The AUK 1 air gap for the spillover on WC cistern to the WC pan is a height of?
25mm
100mm
200mm
300mm
The Water Regulations and BS6700 covers protecting the pipework from?
Frost
Heat gain
Heat loss
All of the above
The system being isolated to be removed and capped off at the closest point to the branch is known as?
Temporary decommission
Permanent decommission
What is known as a section of pipework through which water cannot be drawn off or flow?
Passive dead leg
Active dead leg
Latent dead leg
Stagnant dead leg
If the water supply is not in use but the meter is still going up, what could be the cause?
Air in the system
A leak in the property
A leak from outside
A faulty water meter
Which of the following would NOT be a cause of blockage due to the system not being flushed properly?
Valve not open fully
Limescale
Over-soldered or hemp
High spots in the system
Which of the following would NOT effect the flow rate?
Cold feed pipe run in 15mm
Stop valve on the cold distribution
High pressure orifice in FOV to WC cistern
Soldered fittings instead of compression fittings
Air locks occur in:
Low points in low pressure systems
Low points in high pressure systems
High points in low pressure systems
High points in high pressure systems
A pressure gauge measures in?
Bar
Litres per second
Litres per minute
Pascals
Which of the following is a PPM:Planned Preventative Maintenance?
Replacing washers in outlets
Overflow running
Burst pipework
Broken FOV arm
How many tests are there for plastic pipe?
3
2
5
7
What is a Reduced Pressure Zone (RPZ) valve used for?
Category 1 from category 3
Category 1 from category 4
Category 1 from category 5
Category 1 from category 6
Identify the stop valve.
STATEMENT: Filtered grey water is suitable for drinking
True
False
What is a ferrule?
A filter for the warning pipe
A fitting to connect the water mains
A debris measuring device
A device that unclogs limescale from valves
