Cold water 1

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

What is the correct way to leave open ended pipework?

• Place a warning label on every open end

• Cap off with a push fitting

• Warn the customer not to interfere with any pipework

• Be as quick as you can to return

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

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

• A legal requirment

• To be corrosion resistant

• To avoid contamination

• All of the above

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