Plumbing level 2 - PP2.1 - Drainage

What is the primary purpose of a trap under an appliance?

• To reduce water usage

• To increase water pressure

• To stop the noxious smell from entering the property

• To prevent water leakage

What material are the majority of traps made from?

• Chrome

• Copper

• Brass

• Polypropylene

What is the minimum trap seal depth for a trap with a diameter of 50mm or above?

• 75mm

• 38mm

• 50mm

• 25mm

Which appliance requires a 75mm seal depth for the soil stack?

• Washbasin

• Bath

• Bidet

• Shower

What is the minimum trap seal depth for a gulley?

• 50mm

• 75mm

• 25mm

• 38mm

What type of trap is commonly installed when the discharge branch is horizontal to the appliance?

• S trap

• P trap

• Bottle trap

• Running trap

What is a slimline or pedestal trap specifically designed for?

• Shower

• Washbasin

• Dishwasher

• Washing machine

What is the height of an extended P trap used for a washing machine or dishwasher?

• 400mm

• 500mm

• 300mm

• 600mm

Which trap is sometimes used under a washbasin due to its neat appearance?

• S trap

• P trap

• Running trap

• Bottle trap

What is the main advantage of a self-sealing waterless valve?

• It restricts pipework length

• It is noisy

• It prevents negative pressure

• It uses a water seal