A thermodynamic steam trap opens and closes by a single ___ that rises to allow the discharge of air and cool condensate.

Water transports heat more efficiently with less temperature loss over distances than air.

An automatic makeup water system on a small low pressure boiler connected to the city’s water supply uses an automatic makeup feeder located slightly below the NOWL.

Water transports heat more efficiently with less temperature loss over distances than air.

A steam trap that fails to open causes a heating unit to become ___.

The range of pressure on a vacuum switch is usually ___.

Fuel oil burners include atomizing and rotary cup burners.

The range of pressure on a vacuum switch is usually ___.

Air or gases flow from a location of low pressure to a location of high pressure.

Sensible heat is heat that ___.