___ heat must be added or removed to cause a substance to change state between a solid and a liquid or a liquid and a gas.

___ heat must be added or removed to cause a substance to change state between a solid and a liquid or a liquid and a gas.

Low-water cutoffs must be checked at least weekly or when local ordinances require.

The ASME Boiler and Pressure Vessel Code requires each automatically fired steam boiler to be protected from overpressure by ___ pressure-actuated control(s).

The ___ is a nongovernmental international organization that is comprised of national standards institutions of over 90 countries.

A ___ is a component of a refrigerant system that controls the flow of refrigerant into an evaporator.

When a handwheel is turned to open a nonreturn valve, the stem retracts but the valve ___.

Check valves are available as swing, lift, and spring check valves.

The ___ is a nongovernmental international organization that is comprised of national standards institutions of over 90 countries.

The two types of pressure control are additive pressure control and subtractive pressure control.