1) Where are the statutory requirements for the installation of drainage systems? a) BS 6700 b) BS EN 12056 c) Building Regulations d) WRAS. 2) Identify this type of stack system. a) Primary ventilated stack b) Secondary ventilated stack c) Ventilated discharge branch stack d) Stub stack 3) If a discharge branch has a gradient of 18mm per metre and the branch is 3 metres in length, what would the vertical drop distance be? a) 54mm b) 18mm c) 36mm d) 72mm. 4) Which one of the following is a type of plastic gutter profile? a) Mansard b) Ogee c) Half channel d) Elson. 5) The maximum recommended length of a discharge pipe from a bath connected to a primary ventilated stack is: a) 3 metres b) 4 metres c) 5 metres d) 6 metres. 6) What is the recommended termination, as per Building Regulations, for a soil stack inside a building? a) Open ended b) Cowl c) Domical cage d) Air admittance valve. 7) If foul water and sewage were to come into contact with a plumber’s skin, the plumber could contract: a) Hepatitis b) Malaria c) Yellow fever d) Giardiasis. 8) What is the minimum sized waste that is allowed to be fitted to a washbasin? a) 32mm b) 40mm c) 50mm d) 100mm. 9) After a performance test, what is the minimum trap seal depth allowed? a) 10mm b) 15mm c) 25mm d) 50mm. 10) According to Building Regulations, what is the permissible drop in pressure during a soundness test on a soil stack? a) 38mm b) 25mm c) 10mm d) Nil. 11) In the Victorian period, what was a common material used in guttering? a) Cast iron b) Plastic c) Asbestos d) Pressed steel. 12) When installing a cast iron soil stack, a ladder is used to gain access to some scaffolding. How many rungs of the ladder should be above the working area? a) 2 b) 3 c) 4 d) 6. 13) What would be the best way to prevent a customer from using a sanitary appliance whilst work is being carried out on the soil stack? a) Write a letter to the customer b) Place warning notices on the appliances c) Isolate the electrics in the property d) Isolate the incoming cold water. 14) What is the main purpose of a rainwater system? a) Filter surface water prior to entry of the surface water drain b) Stop penetration of rainwater into the property c) Route all rainwater to the soakaway d) Stop foul smells at high level. 15) What is recommended to stop crossflow in a soil stack opposite a WC? a) Boss strap b) No connections for 100mm c) Air admittance valve d) No connections for 200mm. 16) If you realise that a customer’s WC is connected to the surface water drain, what should you do? a) Nothing b) Advise the customer never to use the WC c) Advise the customer that it requires connecting to the foul water drain d) Advise the customer that the WC pan needs to be changed. 17) What is the main purpose of the item identified? a) Boss connection b) WC connection c) Access for roding d) Air inlet valve. 18) If an air admittance valve is located within some boxing, what is required to allow the valve to operate effectively? a) a. Access from the loft area b) b. Additional ventilation in the boxing c) c. The boxing must be sealed d) d. Only one appliance can be discharged at any one time. 19) What problem may occur if the waste pipe gradient from a washbasin is too steep? a) Compression b) Capillary action c) Self-siphonage d) Momentum. 20) What type of screws are recommended to be used when attaching facia brackets to the facia board? a) Stainless steel b) Galvanised c) Brass d) Chrome plated.

Drainage system

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