9189PH2CW2

What is the purpose of boosted cold water systems in multi-storey buildings?

• To decrease the water pressure for the entire building

• To supply water to the lowest part of the building

• To supply water to the highest part of the building

• To filter the water for the entire building

Why are direct boosting systems often not allowed by water undertakers?

• Because they are too expensive to install

• Because they can often reduce the mains pressure for other consumers and increase the risk of contamination by backflow

• Because they use too much electricity

• Because they are difficult to maintain

Under what condition may direct boosting be allowed?

• If the demand is above 0.2 litres/second

• If the demand is below 0.2 litres/second

• If the building is less than 10 stories tall

• If the building has a separate filtration system

What can boosting pumps in cold water systems cause?

• Decrease in water pressure

• Improvement in water quality

• Excessive aeration of the water

• Reduction in water supply

What is a common concern for consumers regarding water quality in boosted cold water systems?

• The water is too hot

• The water has an opaque, milky appearance

• The water contains harmful chemicals

• The water is discolored

Which of the following is NOT a common example of boosted cold water systems?

• Direct boosting systems

• Indirect boosting to a storage cistern

• Direct boosting to a drinking water heater and duplicate storage cisterns

• Direct boosting with a cooling mechanism

What controls the pumps in a direct boosted cold water system?

• A) A timer

• B) A float switch device inside the high-level cistern

• C) Water pressure sensors

• D) Manual switches

At what point do the pumps switch on in a direct boosted cold water system?

• A) When the water level is at the top of the cistern

• B) When the water level drops to about half the cistern capacity

• C) When the water level reaches a depth of about 50mm below the shut-off level

• D) When the cistern is completely full

At what water level do the pumps switch off again in a direct boosted cold water system?

• A) When the water level is at the top of the cistern

• B) When the water level drops to about half the cistern capacity

• C) When the water level reaches a depth of about 50mm below the shut-off level

• D) When the cistern is completely empty

What is the purpose of the float operated valve in a direct boosted cold water system?

• A) To control the temperature of the water

• B) To regulate the water pressure

• C) To maintain the water level in the cistern

• D) To prevent backflow of water