Plumbing level 2- PP-3.2- Hot water

What is the maximum length of a 22-28mm pipe before it becomes a dead leg according to BS6700?

• 3m

• 8m

• 12m

• 15m

What temperature must the water at a terminal fitting be within 30 seconds after fully opening the terminal fitting, as recommended by Water Regs?

• 50°C

• 55°C

• 40°C

• 45°C

What is an active dead leg?

• A pipe that is used for hot water only

• A section of pipe that has been capped off

• A lot of cold water has to be drawn off before hot water reaches the outlet

• A pipe that is used for cold water only

What is the purpose of an Essex flange in a secondary circulation system?

• To control the temperature

• To insulate the pipe

• To prevent heat loss

• To connect the return pipe to the cylinder

What is the recommended action to prevent cold water warming up due to proximity to hot water pipes?

• Use smaller diameter pipes

• Use larger diameter pipes

• Install hot water pipes above cold water pipes

• Install cold water pipes above hot water pipes

What is the fluid category for water that represents a severe/serious health risk?

• Category 4

• Category 1

• Category 3

• Category 5

What is back siphonage?

• The flowing of water in the correct direction

• The decrease of water temperature in the system

• The flowing of water in the wrong direction due to loss of system pressure

• The increase of water pressure in the system

What is the simplest form of mechanical backflow prevention?

• Air gap

• Single check valve

• Double check valve

• RPZ valve

What is the minimum air gap required for a basin according to AUK2?

• 20mm

• 25mm

• 15mm

• 10mm

What type of valve is used to protect wholesome water against the backflow of category 3 water?

• RPZ valve

• Double check valve

• Air gap

• Single check valve