Domestic Hot Water 6035-02 | Part 1

The difference between 'direct' and 'indirect' hot water systems is:

• Direct system comes straight from the CWSC

• Indirect systems only feeds the kitchen sink

• Direct system does not have a heat exchanger coil within the cylinder

• Indirect systems have no need for an F&E cistern

Define 'back siphonage'.

• When the pressure at the supply end of the water main drops suddenly causing a vacuum

• When the mains water is shut off due to repairs causing a backwards flow

• When the pressure drops within the cylinder causing a circulation within one pipe

• When the pressure is higher from the cold supply than the hot supply

What does WRAS stand for?

• Water Regulations Application Service

• Water Regulations Advisory Scheme

• Water Regulations Arbitration Site

• Water Regulations Advisory Service

What supplies the primary circuit with water?

• Feed & Expansion cistern

• Mains water

• Cold water storage cistern

• None of the above

If the coil in the cylinder fails, what course of action should be taken?

• Replace the coil

• Replace the boiler

• Replace the cylinder

• Replace the F&E cistern

What is another term for "one-pipe circulation"?

• Parasitic circulation

• Anti-circulation

• Backwards circulation

• Primatic circulation

If the pipework sizing is too small it will?

• Effect pressure

• Effect flow rates

• Improve flow rates

• None of the above

What is the purpose of this proprietary fitting?

• To allow the connection between copper pipe and lead pipe

• To allows the connection between LCS pipe and copper pipe

• To allows the connection between lead pipe and lead pipe

• To allow the connection between waste pipe and lead pipe

Which of the following could be installed to prevent water hammer?

• Double check valve

• Lever arm service valve

• Equilibrium valve

• Portsmouth valve

What is the component shown?

• Twin impellor pump

• Base heat exchanger

• Negative head pump

• Thermostatic pump valve