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An induced draft fan is located in front of a boiler furnace.

A common cause of problems in a hot water system is air in the system.

An induced draft fan is located in front of a boiler furnace.

A measurement of the quantity of heat transfer is the British thermal unit (Btu).

Heat is transferred by ___.

A measurement of the quantity of heat transfer is the British thermal unit (Btu).

If the bottom line to a gauge glass is closed or clogged, the glass will be empty.

The boiler must be ___ when the low water fuel cutoff is blown down.

In a ___ system, a boiler is used to produce the steam required for building processes.

The water column of a boiler should be blown down each shift.