The total force on a safety valve is equal to the ___.

___ prevents blower operation at startup until the damper reaches purge position.

The ___ uses a four-color diamond-shaped sign to display basic information about hazardous materials.

The quick-opening valve is opened first and closed last during blowdown.

Steam that has given up its heat and turned back to water is boiler water.

When using a manometer to measure draft, the difference between the levels of liquid in two legs is the draft measurement.

Steam that has given up its heat and turned back to water is boiler water.

Feedwater is water that is treated for use in a boiler.

Feedwater is water that is treated for use in a boiler.

Water in a boiler is heated and turns to condensate.