Cold Water Supply 1

1.    When installing a new indirect cold water system, which of the following should happen, according to the Water Regulations?

• a.    One tap, normally the kitchen sink, should be drawn directly from the supply pipe

• a.    One tap, normally the kitchen sink, should have a dedicated distribution pipe from the storage cistern

• a.    Mixer taps will require double check valves

• a.    Mixer taps should never be installed due to the pressure differences.

1.    According to BS6700 and the Water Regulations, a drain off valve should be installed:

• a.    At every draw off point

• a.    At every high point in the system

• a.    At every low point in the system

• a.    Above the cold water storage cistern.

1.    Pin holing in copper pipework is commonly caused by:

• a.    Hard water

• a.    Acidic water

• a.    Alkaline water

• a.    Pure water.

1.    While installing pipework in a property, you are called off site to another job. What would be the correct course of action with any open-ended pipework?

• a.    Place a warning label on every open end

• a.    Warn the customer not to interfere with any pipework

• a.    Be as quick as you can to return.

• a.    Cap off with a push fit fitting

1.    One of the major problems when leaving a dead leg in a cold water pipe is:

• a.    Electrolytic corrosion

• a.    Pitting of pipework

• a.    Reduction in water flow

• a.    Possible bacterial growth.

1.    The use of WRAS approved fittings when installing cold water pipework is:

• a.    A legal requirement

• a.    To be corrosion resistant

• a.    To avoid contamination

• a.    All of the above.

1.    On the completion of a new cold water installation, the system has been proven sound. What would the next course of action be?

• a.    Visual inspection with the customer

• a.    Flush the pipework out then hand over to the customer

• a.    Prepare the benchmark certificate

• a.    Hand over to the customer.

1.    What is the most cost effective way to repair a stop valve that has the head gear jammed open?

• a.    Replace the head gear only

• a.    Replace the whole valve

• a.    Leave in position, and install a new stop valve upstream

• a.    Repack the glands around the spindle.

1.    When decommissioning a system, the correct procedure is to:

• a.    Turn off the water quickly to save any wasted water

• a.    Drain the system down then inform the customer

• a.    Inform the customer first then drain the system

• a.    Use a pump to drain down quickly.

1.    What is this item?

• a.    Fullway gate valve

• a.    Drain off valve

• a.    Stop valve

• a.    Spherical ball valve.