WorksheetsUnit 205: Cold water systems — Sample questions
Total questions: 13
Worksheet time: 7mins
When installing a new indirect cold water system, which of the following should happen, according to the Water Regulations?
One tap (normally kitchen sink) drawn directly from the supply pipe
One tap (normally kitchen sink) should have a dedicated distribution pipe from the storage cistern
Mixer taps will require double check valves
Mixer taps should never be installed due to the pressure differences
According to BS6700 and the Water Regulations, a drain off valve should be installed:
At every draw off point
At every high point in the system
At every low point in the system
Above the cold water storage cistern
Pin holing in copper pipework is commonly caused by:
Hard water
Acidic water
Alkaline water
Pure water
The use of WRAS approved fittings when installing cold water pipework is:
A legal requirement
To be corrosion resistant
To avoid contamination
All of the above
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.
What is this item?
Fullway gate valve
Drain off valve
Stop valve
Spherical ball valve.
When installing a new water service pipe to a property, it should normally be buried between what depths?
135mm to 1,750mm
350mm to 750mm
1,350mm to 1,750mm
750mm to 1,350mm.
Which of the following materials is not allowed to be installed on new cold water systems?
Copper
Stainless steel
MDPE
Lead.
What type of 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.
The fluid category that offers a slight health risk to a customer is:
1
2
3
4
The correct back flow protection device that would be installed prior to a shower mixer valve would be:
Single check valve
Double check valve
RPZ valve
Type AG air gap
To protect category 1 water from category 3 water, what would need to be installed, according to the Water Regulations?
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
