Larger boilers are designed to use mechanical draft, which can be controlled more precisely and results in higher combustion efficiency.

Radiation has a major impact on all cooling systems.

A combination heating system uses all the components of a hot water heating system and a steam heating system.

Improper feedwater treatment is probably the largest direct cause of boiler failure.

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

A TXV maintains a constant superheat of about 8°F to 12°F.

All boilers in battery must have two main steam stop valves or one main steam stop valve and one ___.

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.