A(n) ___ is an absorption chiller system component that vaporizes the refrigerant and separates it from the absorbent.

Gas burners can only be high pressure gas burners.

Return steam traps discharge condensate directly back to the boiler.

A general boiler room safety rule says that when performing a bottom blowdown, the quick-opening valve should be opened first and closed last.

With high-efficiency condensing boilers, the stack temperature may be as low as ___°F.

Electric spark igniters are controlled by combustion safety control systems.

A low water condition is caused by an excessive amount of water in a boiler as indicated by the gauge glass.

With high-efficiency condensing boilers, the stack temperature may be as low as ___°F.

Return steam traps discharge condensate directly back to the boiler.

The ASME Boiler and Pressure Vessel Code allows ___ valve(s) to be placed between a boiler and a safety valve or between a safety valve and the point of discharge.