Hot Water Systems Quiz phase 2 1.9

What is the purpose of secondary circulation systems in hot water systems?

• To increase water pressure

• To prevent system dead legs

• To reduce water temperature

• To enhance water flavor

What happens to the water in the pipe when the outlet is closed?

• It heats up

• It evaporates

• It cools down

• It changes color

What risk can arise from long pipe runs in large systems?

• Increased water pressure

• Legionella risks

• Pipe corrosion

• Water discoloration

According to the Water Supply (water fittings) Regulations, what is the maximum dead leg distance for a pipe with an outside diameter of 12mm?

• 20m

• 12m

• 8m

• 3m

What is the maximum length in meters for a pipe with an outside diameter over 22mm and up to and including 28mm?

• 20m

• 12m

• 8m

• 3m

For a pipe with an outside diameter over 28mm, what is the maximum dead leg distance allowed by the regulations?

• 20m

• 12m

• 8m

• 3m

If a pipe has an outside diameter over 12mm and up to and including 22mm, what is the maximum length in meters according to the regulations?

• 20m

• 12m

• 8m

• 3m

What percentage down the cylinder is the ring main returned in a secondary circulation system?

• 10%

• 25%

• 50%

• 75%

In unvented hot water storage systems, where does the secondary return pipe enter the hot water vessel?

• At the top of the vessel

• At the cold feed pipe

• At the bottom of the vessel

• At the hot water outlet

How is the circulation in secondary circulation systems maintained?

• By gravity

• By pumping

• By manual operation

• By solar power