A ___ is a device used to create resistance in order to regulate the flow of air and the gases of combustion in a boiler.

The feedwater pressure gauge on a small low pressure steam boiler turns the feedwater pump ON or OFF as required to maintain the NOWL.

The feedwater regulator has a sensing element located at the ___.

Condensate in steam lines can result in ___.

The determining factor whether a boiler is in condensing mode or not is the return water temperature.

A boiler should be filled with water heated to 70°F before it is started for the first time.

A boiler should be filled with water heated to 70°F before it is started for the first time.

When burning No. 6 fuel oil, the fuel oil strainers should be cleaned at least once every ___ hr.

An entry permit must be posted at confined space entrances or otherwise made available to entrants before entering a permit-required confined space.

Chemical treatment changes calcium and magnesium into nonadhering sludge to prevent scale buildup.