006 Hot Water Quiz

At which one of the following temperature ranges should hot water be stored?

• 30% – 35%

• 40% – 45%

• 50% – 55%

• 60% – 65%

Which one of the following is the minimum size of an open vent pipe from a hot water cylinder?

• 15 mm.

• 22 mm.

• 28 mm.

• 35 mm.

Which one of the following component parts is installed after the incoming stop valve?

• Drain off.

• Air vent.

• By-pass valve.

• Water meter.

Which one of the following is the maximum depth a water main service should be laid?

• 750 mm.

• 1000 mm.

• 1350 mm.

• 1650 mm.

To ensure correct operation, a single feed indirect cylinder requires which one of the following to be formed?

• A heat exchanger.

• An air bubble.

• An annulus.

• A flute.

Which one of the following is used by gravity primary pipework to circulate the water?

• A circulating pump.

• Conduction.

• Radiation.

• Convection.

Which one of the following is the minimum distance the distribution pipe from the cylinder should be installed horizontally before it connects to the open vent pipe?

• 450 mm.

• 750 mm.

• 1350 mm.

• 1650 mm.

Installing which one of the following would overcome problems caused by long pipework runs?

• A primary circuit.

• A heating circuit.

• A secondary circuit.

• A gravity circuit.

Stratification is most likely to take place in a

• cold water storage cistern

• feed and expansion cistern

• float operated valve

• hot water storage cylinder.

A fullway gate valve is installed in the

• cold feed pipework

• incoming main pipework

• hot feed pipework

• feed from the F&E cistern.