A new automatic water flow cut off device has been correctly installed to an automatic flushing cistern but is not performing to specification. The appropriate action the plumber should take is to

• advise the customer to return the item

• strip the item down and attempt to repair it

• get the item replaced under warranty

• get the manufacturer to visit site and replace it.

The main purpose of a dual flush WC cistern is to

• increase the volume of water to flush the pan

• allow the cistern to be connected to a siphonic pan

• prevent the possibility of the cistern overflowing.

• significantly improve water conservation

A partially blocked outlet from a WC would cause

• the siphon to malfunction

• the WC cistern to overflow

• the bath waste pipe to be blocked

• failure of the pan to clear its contents completely.

A pop-up waste fitted to a wash basin fails to retain the water when in the closed position. To rectify the problem a plumber should first

• adjust the plug lift at the control port seal connection

• Increase the plug lift by rotating the adjuster anti-clock wise

• reduce the plug lift by rotating the adjuster clock wise

• adjust the shackle so that it is closer to the waste fitting.

Which of the following jointing materials is suitable for making a plastic basin waste into a vitreous china wash basin?

• Linseed oil putty

• Jointing compound

• Silicone sealant

• Hemp.

What is the recommended flushing volumes of a dual flush wc cistern

• 6 and 5 litres

• 6 and 4 litres

• 8 and 4 litres

• 9 and 4.5 litres

The cold water supply to a macerator WC should be isolated by a

• Service valve

• Gate valve

• Supply stop valve

• Single check valve

Whilst re-washering a tap the plumber notices that the washbasin is cracked. The plumber’s next action would be to

• tell the customer and then agree the next action

• get the appropriate tools and renew the wash basin

• contact the manufacturer and arrange a replacement

• contact the supplier and arrange a replacement.

The electrical supply to a sink waste disposal unit should be wired from

• a fused double pole switch

• the meter connection

• a pull switch in the kitchen

• an un-switched outlet.

Which of the following would cause the least disruption to the customer when all the WC fitments in a busy public toilet are being replaced?

• Close the toilets down and provide external portable WC facilities

• Carry out the work in stages outside normal working hours

• Organise additional plumbers to get the job done much quicker

• Keep the toilets open and supply internal portable WC facilities.