Font size
WorksheetsLevel 2 - Cold Water MEGA QUIZ
Total questions: 62
Worksheet time: 31mins
What kind of fittings should be used to avoid contamination?
WRAS approved fittings
Corrosion resistant fittings
Contamination resistant fittings
Compression fittings
Which two tests are key for a cold water system?
Pressure
Flow rate
Temperature gain
pH levels
Bacterial growth levels
Select two advantages of an indirect system.
Unaffected by peak demand.
Potable water at every draw off point.
Stored supply of water should interruption occur to the main.
No concerns about storage cisterns in loft.
Good pressure at all outlets.
Identify this FOV.
BS 1212 Part 2 float operated valve
BS 1212 Part 1 float operated valve
BS1010 Part 2 float operated valve
BS 1010 Part 1 float operated valve
Type the number. Fluid category _ represents a significant health risk.
(a)
What prevention of backflow must be maintained on a basin?
AUK 1 air gap
AUK 2 air gap
AUK 3 air gap
AG air gap
Identify this FOV.
BS 1212 Part 4 float operated valve
BS 1212 Part 1 float operated valve
BS 1212 Part 2 float operated valve
BS 1212 Part 3 float operated valve
What are the three things that insulation is trying to prevent?
Heat gain
Heat loss
Freezing
Heat impact
Heat
The cold feed, feeds all of the outlets on an indirect system. True or false?
False
True
Type your answer. A (a) must be used as an isolation valve on the cold distribution pipe, as it will not restrict the flow of water when open.
Who has responsibility for repairing and maintaining the Communication pipe?
Local authority
Property owner
Government
Water undertaker
WRAS stands for?
Water Regulations Application Service
Water Regulations Advisory Service
Water Regulations Advisory Scheme
Water Regulations Arbitration Site
What is a ferrule?
An iron measuring device
A fitting used to connect to a water main
A metal containing iron
Who has responsibility for repairing and maintaining the Service pipe?
Local authority
Property owner
Water undertaker
Government
At what temperature does temporary hard water begin to form limescale?
55°C
65°C
85°C
100°C
The chemical compound for calcium carbonate is CaCO3.
True
False
Which type of water is of an acidic nature and causes problems to plumbing systems through electrolytic corrosion?
Permanent hard water
Temporary hard water
Neutral water
Soft water
Which method is used to treat very hard water in plumbing systems?
Galvanic cell
Base exchange water softener
Chemical dosing
Electromagnetic waves
Which type of water filters through limestone and chalk?
Very soft water
Soft water
Permanent hard water
Temporary hard water
When installing an incoming mains, the pipe should be laid between:
500mm and 1200mm
800mm and 1500mm
750mm and 1350mm
1000mm and 2000mm
What colour is MDPE?
Black
Blue
Red
Yellow
What is the minimum size pipe modern properties are supplied with?
15mm
22mm
25mm
28mm
Due to MDPE degrading in sunlight, what is the maximum permitted length you can install above the finish floor level?
400mm
275mm
200mm
150mm
In accordance with the Water Regulations, where should the stop valve be located?
Inside the building, below floor level, as close as possible to the door
Inside the airing cupboard, as close as possible to the door
Outside the building, as close as possible to the property boundary
Inside the building, above floor level, as close as possible to the point of entry
Where must you install drain-offs in a plumbing system?
At every low point in the system
At every high point in the system
In areas out of sight to the homeowner
Just at the point of entry to the property
Select all correct options.
Grey water recycling is used on which appliances?
WC cisterns
Washing machines
Dishwashers
Basins
Grey water is considered as wholesome water.
True
False
Match the following descriptions to the correct fluid category
These changes are aesthetic only and do not constitute
a health risk. Typical situations where this may occur in
domestic properties are:
● water heated in a hot water secondary system
● mixed fluid categories 1 and 2 water discharged
from combination taps or showers
Fluid category 2
Typical situations are:
● in houses, apartments and other domestic dwellings:
● water in the primary circuits of heating systems
whether chemicals have been administered or
not
● water in washbasins, baths and shower trays
● clothes and dishwashing machines
● home dialysis machines
Fluid category 3
Typical situations are:
● fire sprinkler systems using anti-freeze
chemicals
● house gardens:
● mini irrigation systems without fertiliser or
insecticides, including pop-up sprinkler systems
and permeable hoses :
● commercial dishwashers
● refrigerating equipment
Fluid category 4
Typical situations are:
● industrial cisterns and tanks
● hose union bib taps in a non-domestic installation
● sink, WC pans, urinals and bidets
● permeable pipes in any non-domestic garden
whether laid at or below ground level
● grey water recycling systems
Fluid category 5
Which one of the following
connections to the CWSC must be
screened?
Cold supply pipe
Cold feed pipe
Warning pipe
Cold distribution pipe.
The warning pipe from a cold water storage cistern must be fitted ?
A. Lower than the float valve
B. Higher than the float valve
C. On the opposite side of the cistern
to the float valve
D. Level with the float valve
A plastic Domestic Cold Water Storage Cistern should be ?
A. Supported with batons under the base
B. Supported over the entire area of the
base with hardboard
C. Supported over the entire area of the
base with chipboard
D. Supported over the entire area of the
base with floor boarding or ply
It is important that flux should be removed from copper tube after the joints have been soldered to help prevent ?
A. Water looking bad
B. Minor staining of the tube
C. Corrosion of the copper tube
D. Odour in the water
The pressure from the bath shower taps in a bungalow is very low when the shower is used. What would be the best solution ?
A. Increase the hot & cold pipe sizes
B. Raise the storage cistern
C. Lower the storage cistern
D. Fit pressure boosting valves
Type your answer. What is the name of the process when water molecules become excited and enter the atmosphere?
(a)
When did the current UK Water Regulations come into force?
1991
1999
1994
1984
If water contains animal waste, butchery and human faecal matter, which UK fluid category does this water come under?
2
4
5
3
What is the difference between fluid category 4 and Fluid category 5?
Fluid category 4 has less effluent than fluid category 5
Exposure to fluid category 4 water may take weeks or months to cause harm, whereas exposure to fluid category 5 water may take hours or days to cause harm?
Fluid category 5 has more germs in it
Fluid category 4 is fresh water, whereas fluid category 5 has its colour or taste changed due to contact with a substance or due to temperature.
Before water can be considered clean and fit to drink, which processes must it go through?
filtration, aeration, settlement, purification
sedimentation, filtration, sterilisation, aeration
sedimentation, filtration, purification, aeration
sedimentation, filtration, percolation, aeration
What is the 'schmutzedecke' ?
A layer of sand and algae
A film of floating floc
A biological layer of sludge
A layer of faecal matter
The Water Regulations main aim is to prevent the following five items from happening? These are?
Contamination of water and the wastage of water
Misuse of water and the undue consumption of water
The erroneous metering of water
All of the above
If a part of an installation becomes redundant, the pipe work should be
Insulated
Earthed
Disconnected
Clipped
One of the major problems when leaving a dead leg in a cold water pipe is
Electrolytic corrosion
Pitting of pipework
Reduction in water flow
Possible bacterial growth
What would be done after sound testing of a new completed cold water system
Visual inspection with the customer
Flush the pipework out then hand over to the customer
Prepare the benchmark certificate
Hand over to the customer
What is the most cost effective way to repair a stop valve that has the head gear jammed open
Replace the head gear only
Replace the whole valve
Leave in position, and install a new stop valve upstream
Repack the glands around the spindle
When decommissioning a system, the correct procedure is to
Turn off the water quickly to save any wasted water
Drain the system down then inform the customer
Inform the customer and other trades first then drain the system
Use a pump to drain down quickly
What is this item?
Fullway gate valve
Drain off valve
Stop Valve
Spherical Ball valve
What type of valve is shown in the diagram?
Spherical Ball Valve
Fullway Gate valve
Stop valve
Spherical Ball Valve
Which of the following materials is not allowed to be installed on new cold water systems?
Copper
Stainless steel
MDPE
Lead
Which valve is designed to shut off the supply of water in a cistern at a predetermined level
Stop Valve
Fullway Gate valve
Float Operated Valve
Isolation Valve
If a hand basin has submerged taps, Which backflow device must be installed
Overflow
Single Check valve
Double Check valve
Auk 3 air gap
Fluid category 1 represents
A serious health risk
A significant health risk
A Slight health risk
No health risk
Which backflow prevention device must be installed on a supply to a hose union bib tap?
Auk 2 air gap
Single check valve
Fullway gate valve
Double check valve
The plastic medium density supply pipe, which is blue, is manufactured from which material?
Polyethelene
Polystyrene
Polypropylene
Polybutylene
mixer tap which allows hot/cold water to mix in body of tap with unbalanced pressure must have
Double check valve on both hot and cold supplies
Single check valve of both hot and cold supplies
AUK 2 air gap
AUK 3 air gap
The fluid category that offers a slight health risk is:
1
3
2
4
The correct back flow protection device that would be installed prior to a shower mixer valve
Single check valve
Double Check Valve
RPZ Valve
Type AG air gap
What would this item be used to test?
Pressure
Category of water
Flow rate
PH Value
If a customers tap is dripping, what tool can be used to correct the situation?
Club hammer
Stillsons
Spanner
Re-seating tool
Where should the cold water distributing pipe be connected to the cistern?
In the air gap 40mm up
Below the cold water storage cistern 50mm down
In the attic 50 mm up
In the side 25mm up
The holes to a cold water storage cistern are made using what type of saw?
Hole saw
Hack saw
Reciprocating saw
Circular saw
What type of cold water system is used on high incoming water pressure
Boosted
Direct
Indirect
Inter Boosted
When installing a new indirect cold water system, which of the following should happen?
One tap (Kitchen sink) drawn from supply pipe
One tap(kitchen sink)should have distribution pipe from cistern
Mixer taps will require double check valves
Mixer taps should never be installed due to pressure differ
