Safety valve capacity is the amount of ___, in pounds per hour (lb/hr), that the safety valve is capable of venting at the rated pressure of the safety valve.

The range of pressure on a vacuum switch on a vacuum pump is usually 2″ Hg to 8″ Hg.

An outside-stem-and-yoke valve is a ___ valve that indicates whether it is open or closed by the position of the stem.

The level of the water in a ___ indicates the water level in the boiler.

The range of pressure on a vacuum switch on a vacuum pump is usually 2″ Hg to 8″ Hg.

The stop valve on the feedwater line should be located as close to the boiler as practical for isolating the boiler from feedwater accessories during service.

The stop valve on the feedwater line should be located as close to the boiler as practical for isolating the boiler from feedwater accessories during service.

___ regulations place restrictions on the design and installation of fuel oil tanks.

___ regulations place restrictions on the design and installation of fuel oil tanks.

A flame establishing period regulates burner firing rate by controlling a modulating motor connected to a combustion equipment control linkage.