Fluid Categories and Backflow Prevention Quiz L2,5 level 2

Which fluid category represents water supplied by a Water Undertaker under section 67 of the Water Act 1991, and must be clean, cold, and wholesome?

• Fluid category 2

• Fluid category 4

• Fluid category 1

• Fluid category 3

What type of water is included in fluid category 3?

• Water in washbasins, baths, and shower trays

• Water in hot water distribution systems

• Water in the secondary circuits of central heating systems

• Water in the primary circuits of central heating systems

Which fluid category represents water that may cause harm after only a very short exposure of minutes to hours to days or even a single exposure?

• Fluid category 5

• Fluid category 1

• Fluid category 2

• Fluid category 3

What is the term used for the reversing of the normal direction of water flow, which can lead to contamination of the water supply?

• Back pressure

• Backflow

• Back syphonage

• Cross connection

What can be a major source of contamination by back pressure and back syphonage?

• All of the above

• Installation of a single check valve on the cold supply

• Connecting mixer taps on hot and cold water supplies

• Cross connection of wholesome water with water from other sources

In which situation is a cross connection between a fluid category 1 water (cold) and a fluid category 2 water (hot) deemed to occur?

• Connecting a bi-flow mixer tap on hot and cold water supplies

• None of the above

• Connecting a true mixer tap on hot and cold water supplies

• Connecting a single check valve on the cold supply

What can lead to back syphonage, where water is sucked backwards through the pipework due to sudden loss of pressure?

• High water pressure downstream

• Sudden decrease in water pressure downstream

• Low water pressure upstream

• Sudden increase in water pressure upstream

Which fluid category represents water with the potential to cause harm over a period of days to weeks to months?

• Fluid category 2

• Fluid category 1

• Fluid category 5

• Fluid category 4

What is the term used for the situation where the water pressure downstream is greater than the water pressure upstream, leading to backflow?

• Back pressure

• Backflow

• Back syphonage

• Cross connection

What is forbidden for water from any other fluid category to come into contact with?

• Water under fluid category 2

• Water under fluid category 3

• Water under fluid category 4

• Water under fluid category 1