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

Because each section of a(n) ___ boiler is modular, sections can be assembled on-site to produce the boiler capacity required.

Because each section of a(n) ___ boiler is modular, sections can be assembled on-site to produce the boiler capacity required.

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

___ 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.

To protect pressure gauges from the damage caused by pressure surges, ___ can be used.

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

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