The range of pressure on a vacuum switch on a vacuum pump is usually 2″ Hg to 8″ Hg.

The stop valve on the feedwater line should be located as close to the boiler as practical for isolating the boiler from feedwater accessories during service.

The stop valve on the feedwater line should be located as close to the boiler as practical for isolating the boiler from feedwater accessories during service.

___ regulations place restrictions on the design and installation of fuel oil tanks.

___ regulations place restrictions on the design and installation of fuel oil tanks.

A flame establishing period regulates burner firing rate by controlling a modulating motor connected to a combustion equipment control linkage.

Specific heat has no unit of measurement since it is a ratio, but it is almost identical numerically to the heat capacity because of the way the Btu is defined.

A deaerator is a boiler water pre-treatment accessory that is used to remove calcium and magnesium to reduce hardness.

A burner should always be firing for periods shorter than periods when it is off to maintain a consistent furnace temperature and improve efficiency.

A hot water boiler relief valve is rated in ___ relieved per hour.