Phase 1 hot water mock test

Which of the following cylinders is a direct cyloinder?

• A

• B

• C

State the minimum size of open vent pipe which terminates over a cold water storage cistern that is allowed under the Water Regulations for a secondary domestic hot water system.

• 15mm

• 22mm

• 28mm

• 32mm

What is the recommended temperature setting for the thermostat to an immersion heater in a hot water storage cylinder?

• 90^oc

• 70^oc

• 60^oc

• 50^oc

Which type of hot water storage cylinder is shown in this diagram?

• direct

• Combination unit

• Double feed indirect

• Single feed indirect

A hot water storage cylinder heated by an immersion heater only is considered to be what type of hot water storage system?

• Direct

• Indirect

• Electrolytic

• Instantaneous

When water is heated in a hot water storage cylinder, stratification will occur. Which of the following best describes stratification?

•      The hottest water is in the middle of the cylinder; the coldest water is at the top and bottom of the cylinder

• a)     The coldest water is at the top of the cylinder and the hottest water is at the bottom of the cylinder

• a)     The coldest water is in the middle of the cylinder; the hottest water is at the top and bottom of the cylinder

• The hottest water is at the top of the cylinder and the coldest water is at the bottom.

What is the electrical power rating of a typical domestic immersion heater?

• 3kw

• 3.7kw

• 4kw

• 10kw

The difference between a single feed and a double feed indirect cylinder is:

• The single feed requires a booster pump

• The single feed does not need a separate F&E cistern

• the single feed requires a twin port motorised valve arrangement

• the single feed does not require an open vent pipe to the secondary storage cistern

what type of cylinder is shown here?

• Single feed indirect

• Direct

• Combination cylinder

• Unvented

Where should the primary open vent pipe in a double feed indirect hot water system terminate?

• Over the cold water storage cistern

• Over the F&E cistern

• To the outside

• In an expansion relief valve