Before relighting a burner, the combustion control programmer must go through a purge cycle.

A ___ should always start up in low fire and shut down in low fire.

After blowing down the water column and gauge glass, the low water fuel cutoff should be blown down also.

The National Fire Protection Association (NFPA) is a federal government agency established in 1970 to control and abate pollution in the areas of air, water, solid waste, pesticides, radiation, and toxic substances.

Atomization is the ability of fuel to be vaporized.

Boiler water analysis tests the condition of boiler water and is used to determine the feedwater treatment required.

Hot water boilers operating with a 250°F water temperature and ___ psi water pressure or less are classified as low pressure.

The effect of hydrostatic pressure must be considered when calibrating a pressure gauge.

A(n) ___ water softener softens water by replacing calcium and magnesium with sodium.

In a low pressure gas system, the manual reset valve cannot open until the gas pilot is lit.