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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.

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

___ 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.

New ___ should be used when replacing a broken gauge glass.

Hot water heating systems require less water than steam to transfer the same amount of heat.

A condensing boiler achieves high efficiency by condensing the vapor in exhaust gases and recovering its latent heat of vaporization.

If combustion is not complete before gases come in contact with a heating surface, the gases will cool and create soot and smoke.

A(n) ___ valve is the valve used to cut a boiler in on-line or take a boiler off-line.