cold water 1 revision

When installing a new indirect cold water system, which of the following should

happen, according to the Water Regulations?

• One tap, normally the kitchen sink, should be drawn directly from the

  supply pipe

• One tap, normally the 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 low point in the system

• At every high point in the system

• Above the cold water storage cistern.

Pin holing in copper pipework is commonly caused by:

• Hard water

• Alkaline water

• Acidic water

• Pure water

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?

• Place a warning label on every open end

• Warn the customer not to interfere with any pipework

• Cap off with a push fit fitting

• Be as quick as you can to return

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

• Possible bacterial growth

• Electrolytic corrosion

• Pitting of pipework

• Reduction in water flow

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

• A legal requirement

• To be corrosion resistant

• All of the above.

• o avoid contamination

On the completion of a new cold water installation, the system has been proven

sound. What would the next course of action be?

• Visual inspection with the customer

• Prepare the benchmark certificate

• Flush the pipework out then hand over to the customer

• Hand over to the customer

What is the most cost effective way to repair a stop valve that has the head gear

jammed open?

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

• Replace the whole valve

• Replace the head gear only

• Repack the glands around the spindle

When decommissioning a system, the correct procedure is to:

• Inform the customer first then drain the system

• turn off the water quickly to save any wasted water

• Drain the system down then inform the customer

• Use a pump to drain down quickly.

What is this item?

• Fullway gate valve

• Drain off valve

• Stop valve

• Gate valve