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Exam 17: Hot-Water Heat

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Question 1

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_________________________ are used to control water flow to different zones in the structure in order to maintain different temperatures in those areas.

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Question 2

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Hot water is typically generated in the boiler, which can be gas-fired, oil-fired, or electric.

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Question 3

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The ______________________________ opens and closes to maintain the desired water pressure in the system.

The _________________________ uses the primary loop as the expansion tank.

The _________________________ is responsible for circulating the water through the system and is located so that it pumps away from the point of no pressure change.

______________________________ pumping systems use circulators in both the primary and secondary loops.

Hydronic systems circulate hot water or steam to the occupied space for heating purposes.

___________________________________ prevent gravity flow through hot water loops when the circulators are off.

_________________________ systems utilize monoflo or diverter tees to balance water flow.

______________________________ return systems often use balancing valves to evenly distribute water flow through each branch.

The _________________________ allows for the expansion of heated water.

The ______________________________ cycles the boiler off in the event that the water level falls below a safe level.

____________________ in the system is removed by using air separators and air vents.

The ___________________________________ is a safety device that opens to relieve system pressure if it rises above the preset limit.