Flash gas is a refrigerant that boils off and cools liquid refrigerant when some of the refrigerant molecules absorb heat from the other refrigerant molecules.

___ weakens the metal and shortens the life of a boiler.

Flash gas is a refrigerant that boils off and cools liquid refrigerant when some of the refrigerant molecules absorb heat from the other refrigerant molecules.

Boiler water pH requirements vary, but the pH value of boiler water typically should be maintained between ___ to prevent scale formation.

Boiler layup is required when a boiler is out of service between shifts.

___ weakens the metal and shortens the life of a boiler.

A therm is the quantity of gas required to produce 100,000 Btu.

A safety valve prevents backflow to a fuel tank from a fuel oil system.

A therm is the quantity of gas required to produce 100,000 Btu.

Procedures commonly performed and logged during a shift include water column and gauge glass blowdown, bottom blowdown, low water fuel cutoff testing, and flame scanner testing.