The internal mechanism of a low water fuel cutoff should be removed from the bowl at the recommended intervals to check and ___ the float ball.

The internal mechanism of a low water fuel cutoff should be removed from the bowl at the recommended intervals to check and ___ the float ball.

To prevent air pressure from building up in a boiler when filling it with water, the ___ must be open.

Surge tanks are vented to the atmosphere and commonly lined with an epoxy coating to prevent corrosion.

___ are pollution standards for six priority pollutants set by the Environmental Protection Agency through the Clean Air Act.

A variable-speed drive (VSD) is a motor controller used to vary the frequency of the electrical signal supplied to an AC motor in order to control its rotational speed.

Surge tanks are vented to the atmosphere and commonly lined with an epoxy coating to prevent corrosion.

The mercury tube in a pressure control must be inspected at least ___ for mercury vaporization.

The words “stack” and “chimney” are often used interchangeably when referring to the structure used to direct the flow of gases of combustion from a boiler to the atmosphere.

The two types of draft produced in a boiler are mechanical and forced.