L2 Above Ground Drainage Systems Pt4

Sanitary appliances are designed to safely discharge which of the following?

• Wholesome water

• Soil and Waste water

• Gas and Oil

• Green water recycling

Which type of trap is shown in the image?

• A bottle trap

• An anti-vac bottle trap

• A P trap

• A gevak style trap

From the descriptions below, state which one is not a true description of a WC pan?

• Double trap

• Siphonic

• Washdown

• Ascending spray

State the stack size requirements for a system for waste discharge only

• 110mm to be used regardless

• 82mm if the building is less than 3 storeys

• Equal to the largest diameter trap outlet or branch discharge connection

• 75mm

What is the most important design consideration regarding access when installing a shower tray?

• The type and colour of the sealant

• The location of the waste trap

• Thermal expansion

• The weight of the tray

The diagram shows which type of drainge system?

• Combined system

• A partially combined system

• A separate system

• A partial separate system

What is the maximum distance allowed from the highest waste connection to the invert of the drain on a stub stack system before ventilation is required?

• 1.6m

• 1.8m

• 2.0m

• 2.5m

The seal used to connect a plastic siphon to the inner body of a WC cistern would be achieved by using which of the following?

• Putty

• A rubber washer

• Hemp and Paste

• Silicone sealant

Pop-up wastes are used on a range of appliances, if one was found to be allowing water to pass by when it is in the closed position, what would be the first thing to check?

• The trap

• The adjustment setting on the rise and fall spindle on the pop-up waste section

• The length of the plug chain

• Compression at the base of the stack

When notching a timber joist, what is the maximum amount you can cut in relation to the depth of the joist?

• 1/2

• 1/4

• 1/6

• 1/8