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WorksheetsCold Water P2 CJ
Total questions: 19
Worksheet time: 10mins
An RPZ valve should be installed with:
an isolating valve upstream of the RPZ valve
an isolating valve downstream of the RPZ valve
an isolating valve both upstream and downstream of the RPZ valve
no isolating valves
In which one of the following fluid categories does the domestic water from a washbasin fall?
Category 1
Category 2
Category 3
Category 4
Under Regulation 5 of the Water Regulations, the water undertaker must be informed when which one of the following operations is carried out?
Installation of a pump drawing more than 12 litres per minute
Installation of a bidet without an ascending spray or flexible hose
Installation of a bath with a capacity of fewer than 230 litres
Installation of an RPZ valve to protect against a category 2 fluid
The type of non-mechanical backflow prevention used on a domestic washbasin is known as:
AUK 1
AUK 2
AUK 3
AUK 4
Which of the following items of legislation covers the requirements for the hydraulic testing of cold water pipe lines?
Water Byelaws (England 2004)
British Standards 5449
Water Supply (Water Fittings) Regulations 1999
Building Regulations Part G (P in Northern Ireland)
Which one of the following mechanical backflow prevention devices would be used when installing a replacement hose union bib tap?
BA
HUK1
HA
HC
Which one of the following types of air gap provides suitable backflow protection for the taps in a washbasin installed in a hospital?
AB air gap
AUK 1 air gap
AUK 2 air gap
AUK 3 air gap
Service valves should be installed in which one of the following locations?
On the cold feed to the primary circuit
On the cold feed pipe from the cold water storage cistern
Immediately after the internal stop valve
Immediately after the external stop valve
Metallic cold water systems should be capable of withstanding an internal pressure of:
the maximum potential operating pressure
1.5 times the maximum potential operating pressure
2 times the maximum potential operating pressure
3 times the maximum potential operating pressure
When preparing to disinfect a cold water system within an occupied block of flats, what should be placed at each outlet?
A contact number for the plumber
Warning notices
Neutralising agents
Residual chlorine test kits
For an RPZ valve to meet its product specification it should be:
provided with a drain pipe via a tundish
installed without isolation valves
sited close to an electrical supply
only installed in a very low pressure supply
When flushing a domestic cold water system, which one of the following types of liquid should be used?
Concentrated disinfectant
Drinking water
Diluted disinfectant
Recycled water
Pressure testing of underground service pipework should take place:
before backfilling has started
after approval from the clerk of works
after backfilling has been completed
after approval from the water supplier
To eliminate the risk of contamination from undue warming, the cold water pipework must never be allowed to exceed what temperature?
20ºC
25ºC
30ºC
35ºC
Which one of the following types of taps typically requires a single check valve to protect against backflow from cross-connection with fluid category 2 water?
High neck pillar tap
Bib tap
Bi-flow mixer tap
Mixer tap
A kitchen sink relies on what type of air gap between the spillover level and the tap outlet?
AUK2
AUK3
AG
AA
What is the minimum head requirement for a gravity fed shower?
150mm
750mm
1,000mm
1,150mm
A cold water storage cistern requires a wooden base for support. If the cistern base measures 1,000mm x 800mm, what (minimum) dimension should the wooden base be cut at?
1,000mm x 800mm
1,150mm x 950mm
1,300mm x 1,100mm
1,500mm x 1,300mm
After disinfection of a cold water system, it is found that the residual chlorine level is 35ppm. What actions should be taken?
The system should be drained and flushed with drinking water
The disinfection process should be repeated to ensure a residual chlorine level no less than 50ppm
The system should be flushed with an inhibitor
The disinfection process should be repeated to ensure a residual chlorine level no less than 70ppm
