A low water condition is caused by an excessive amount of water in a boiler as indicated by the gauge glass.

With high-efficiency condensing boilers, the stack temperature may be as low as ___°F.

The ASME Boiler and Pressure Vessel Code allows ___ valve(s) to be placed between a boiler and a safety valve or between a safety valve and the point of discharge.

Return steam traps discharge condensate directly back to the boiler.

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.