During a hydrostatic test, the boiler is half filled with water.

___ is the placement of a device on an energy-isolating device, in accordance with an established procedure, ensuring that the energy-isolating device and the equipment being controlled cannot be operated.

The most common fuel oil strainers are the T strainer and basket strainer.

The heat content of natural gas varies from 950 Btu to 1050 ___.

___ is a condition caused when steam bubbles are trapped below the boiler water surface.

___ added to boiler water are used to turn scale-forming salts into a nonadhering sludge that stays in suspension in the boiler water.

A therm is equivalent to 100,000 Btu.

A therm is equivalent to 100,000 Btu.

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.