Heat is generated in a boiler by the combustion of a fuel such as gas or fuel oil.

Any maintenance and cleaning of the low water fuel cutoff must be done while there is no pressure on the boiler.

Makeup water is untreated and contains some scale-forming salts that can affect boiler heating surfaces.

At least once a month, a low water fuel cutoff should be tested with an evaporation test.

A nonreturn valve is a type of globe valve that allows a boiler to be cut in on-line automatically when the boiler pressure is at or above the header pressure and allows the boiler to be taken off-line automatically if the pressure in the boiler drops below the header pressure.

An electrical safety policy must include the use of PPE.

The primary regulatory requirements related to electrical safety come from NFPA 70E®, Standard for Electrical Safety in the Workplace.

The ___ of a modulating burner is the ratio of the maximum firing rate to the minimum firing rate.

The ___ of a modulating burner is the ratio of the maximum firing rate to the minimum firing rate.

The primary regulatory requirements related to electrical safety come from NFPA 70E®, Standard for Electrical Safety in the Workplace.