1) What is the minimum size for an open vent on a hot water system? a) 15mm b) 22mm c) 28mm d) 32mm 2) The minimum length for a hot water distribution pipe before the vent connection is? a) 350mm b) 400mm c) 450mm d) 500mm 3) A direct hot water system can be heated by a) using an immersion heater b) using a combi c) using extra coils d) using a high speed coil 4) A combi boiler is an example of a localised system. True or False? a) True b) False 5) Design inspection and testing is covered by which document? a) Wras guide b) Bs6700 c) BS EN 806 d) Approved doc P 6) An instantaneous electric over sink heater is considered as a localised heating source. a) True b) False 7) The Cold Feed can be isolated by a a) Full way gate valve b) service valve c) stop tap d) gas cock 8) The minimum size for a CWSC for indirect CW with gravity HW is what?  a) 130L b) 230L c) 330L d) 430L 9) BS EN 806 recommends the CWSC be  a) at least the capacity of the cylinder b) at least three times the capacity of the cylinder c) at least half the capacity of the cylinder d) smaller than the capacity of the cylinder 10) A cold feed pipe to a cylinder must have what at the base of the connection? a) POF b) DOV c) PIP d) AGD 11) The primary function of the hot water vent pipe is? a) Allow noxious gases to leave b) Act as a safety relief valve c) Provide air for cooling d) Allow for heat loss 12) Which approved document covers unvented hot water systems? a) Approved document A b) Approved Document P c) Approved document G d) Approved document H

Level 2 Hot water (Quiz)

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