An auxiliary low water fuel cutoff is installed ___.

Refrigerants used in mechanical refrigeration systems are derived from fluorine and bromine.

Refrigerants used in mechanical refrigeration systems are derived from fluorine and bromine.

In order to reduce the viscosity of fuel oil, it is necessary to ___.

In order to reduce the viscosity of fuel oil, it is necessary to ___.

A low water fuel cutoff is located slightly below the NOWL.

A back-pressure burner is a burner consisting of tubes with drilled holes that allow pressurized gas to escape into the furnace where the gas is burned.

A back-pressure burner is a burner consisting of tubes with drilled holes that allow pressurized gas to escape into the furnace where the gas is burned.

A negative pressure reading in a manometer is indicated if the level of the liquid in the leg connected to the breeching is ___ to the atmosphere.

___ is the amount of fuel a burner is capable of burning in a given unit of time.