A(n) ___ is a small tank for boiler blowdown water to flow through, where city water is added to the boiler water to reduce the discharge water temperature.

Surface impurities increase the surface tension in a blowdown line by creating a film which prevents ___ bubbles from breaking through the surface of the water.

An authorized employee is responsible for developing and implementing an emergency plan.

Up to ___% annual leak rate is allowed for industrial and commercial refrigeration equipment before repair is required.

Feedwater chemicals are mixed in the ___.

Low water fuel cutoffs must be ___ for proper performance.

A ___ valve is a hot water system control valve that regulates the rate of fluid flow through a hot water piping system to meet system design requirements.

Refrigeration is the process of moving heat from an area where it is undesirable to an area where the heat is acceptable.

Refrigeration is the process of moving heat from an area where it is undesirable to an area where the heat is acceptable.

The ___ of fuel oil is the lowest temperature at which it will flow as a liquid.