Domestic Hot Water 6035-02 | Part 3

Which of the following is a disadvantage of having an unvented cylinder?

• Works on mains pressure

• No need for space for CWSC

• High maintenance

• Good flow rates

What British standard covers the Design, installation, testing and maintenance of hot water?

• BS8000

• BS6700

• BS1212

• BS1200

STATEMENT: You can work on a gas boiler without being gas safe, as long as you notify the Local Authority after work is complete.

• True

• False

What British standard covers the sizing of the cold feed pipe?

• BS6700

• BS1212

• BS8000

• BS6701

What is the allowance for 'pressure drop' during plastic pipe test B soundness test upon inspection?

• No drop allowed

• Maximum of 1 bar

• Minimum of 0.2 bar

• Test bucket should be on 0.0 bar on inspection

Which of the following would you most commonly find in an older property?

• Centralised open vented indirect with pumped primary

• Centralised open vented indirect gravity system

What is the minimum size of the vent pipe?

• 28mm

• 25mm

• 22mm

• 15mm

What are the two materials cylinders are commonly made with? (Choose 2)

• Copper

• Brass

• Polyethylene

• Stainless steel

Which of the following components are NOT required when installing an unvented under sink storage heater?

• Discharge pipe

• Float operative valve

• Single check valve

• Expansion vessel

Why is there a minimum of 450mm of pipework from the exit of the cylinder and the open vent tee?

• Prevents contamination

• Prevents one pipe circulation

• Prevents backflow

• Prevents loss of head height