Hot Water Systems Quiz L3P2U6,1.9

What is secondary circulation?

• A device to control Legionella risks

• A type of pump used in hot water systems

• A type of insulation used in trace heating

• A method to prevent system dead legs

What type of pump is used with secondary circulation?

• A bronze pump

• A diaphragm pump

• A centrifugal pump

• A submersible pump

Why is a check valve used in secondary circulation?

• To control Legionella growth

• To regulate water temperature

• To prevent reverse circulation

• To increase water pressure

How is the secondary circulation pump normally operated?

• By the use of a time clock

• By manual control

• By a pressure switch

• By a flow sensor

What is trace heating?

• An electrical element in contact with the pipe to maintain the temperature of the water in the pipe

• A type of insulation used in hot water systems

• A device to control water pressure

• A method to prevent Legionella risks

What is the purpose of secondary circulation systems?

• To control Legionella growth

• To increase water pressure

• To prevent system dead legs

• To regulate water temperature

What is the maximum length of a dead leg for a 12mm pipe?

• 3m

• 20m

• 12m

• 8m

What is the maximum length of a dead leg for a 22mm pipe?

• 3m

• 8m

• 20m

• 12m

What is the maximum length of a dead leg for a 28mm pipe?

• 8m

• 3m

• 12m

• 20m

What is the maximum length of a dead leg for a pipe over 28mm?

• 20m

• 12m

• 8m

• 3m