Select the correct trap seal loss: When it discharges, a plug of water is formed; as the plug moves down the waste pipe, a negative pressure is created pulling the trap out.

• Capillary action

• Evaporation

• Momentum

• Self-siphonage

If a branch has a single appliance on the ventilated branch system, what size must the branch be?

• 25mm

• 28mm

• 32mm

• 40mm

Select the answer that states the disadvantage to the combined system.

• Maintenance is easier

• All drains are flushed by rainwater

• Impossible to make an incorrect connection

• More expensive for the water authority to treat the additional rainwater

The trap seal depth(mm) for washing machines or dishwashers are?

• 50mm

• 75mm

The size of waste pipe for a washing machine or dishwasher is?

• 32mm

• 40mm

• 75mm

• 100mm

In the Victorian period, what was a common material used in guttering?

• Cast iron

• Plastic

• Asbestos

• Pressed steel

The fittings must be inserted up to the this line for what reason?

• Improves the efficiency

• Thermal expansion

• Frost condensing

What is the minimum trap seal depth for a gulley?

• 28mm

• 38mm

• 45mm

• 54mm

The component shown is?

Which part of BS EN 12056 deals with the layout and design of sanitary pipework systems?

• Part 1

• Part 2

• Part 3

• Part 4