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A modulating cam is a mechanical device used to regulate the flow of fuel oil to a burner for controlling the firing rate.

The ___ is the temperature at which fuel oil will burn continuously when exposed to an open flame.

The ___ is the temperature at which fuel oil will burn continuously when exposed to an open flame.

If a safety valve is 3″ in diameter, its area is ___ sq in.

Proper maintenance of equipment is as critical to safety and proper operation of the equipment as the selection of PPE is to the protection of the worker.

A safety valve must pop fully open when the set pressure is reached and is used for gases and vapors only, but a safety relief valve can be used for gases, vapors, or liquids.

During operation, a ___ holds water, transfers heat to the water to make steam, and collects the steam that is produced.

Condensate is separated from steam by a ___ that allows condensate, but not steam, to pass into condensate return lines.

The relieving pressure of a relief valve on a low pressure hot water boiler cannot exceed ___ psi or the MAWP designated on the boiler.

___ is the removal of refrigerant in any condition from a system and the storage of the refrigerant in an external container without testing or processing it in any way.