Cold Water Systems Quiz L3P2U5,2.9:1

What is backflow?

• The reversing of water flow

• The normal direction of water flow

• The sudden loss of pressure in pipework

• The pressure of water downstream

What are the two types of backflow?

• Back pressure and back syphonage

• Backflow and cross connection

• Back syphonage and cross connection

• Back pressure and cross connection

Which method is the most effective for preventing contamination between water supplies?

• Type AA air gap

• Type AB air gap with weir overflow

• Type AG gap with minimum size circular overflow

• Type AD air gap with injector

Which air gap provides protection against fluid category 5?

• Type AA air gap

• Type AB air gap with weir overflow

• Type AD air gap with injector

• Type AG gap with minimum size circular overflow

Which air gap is suitable for high risk situations and provides protection from insects, dust, and vermin?

• Type AA air gap

• Type AB air gap with weir overflow

• Type AD air gap with injector

• Type AG gap with minimum size circular overflow

Which air gap is primarily used in commercial clothes washing machines and dishwashers?

• Type AG gap with minimum size circular overflow

• Type AB air gap with weir overflow

• Type AD air gap with injector

• Type AA air gap

Which air gap is suitable for backflow protection up to Fluid Category 3?

• Type AA air gap

• Type AB air gap with weir overflow

• Type AD air gap with injector

• Type AG gap with minimum size circular overflow

Which air gap can be found on WC cistern and pan installations?

• Type DC Pipe Interrupter with a permanent atmospheric vent

• AUK3 air gap for taps/combination fittings

• AUK2 air gap for taps/combination fittings

• AUK1 air gap with interposed cistern

What is the AUK2 air gap used for?

• Protection from insects, dust, and vermin

• Discharging water into a fluid category 5 vessel

• Discharging water over an appliance

• Protection against fluid category 5

What is the Type DC Pipe Interrupter used for?

• Allowing air into the stream of back flowing water

• Discharging water into a fluid category 5 vessel

• Preventing back syphonage

• Protection against fluid category 5