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A ___ pump produces a negative pressure on condensate return lines to draw condensate back from a system.

Small particles of water carried into steam lines are called ___.

A(n) ___ is a metering device that senses the temperature of the refrigerant discharged from an evaporator and controls the amount of liquid refrigerant flowing into the evaporator.

The relief valve should be located on the highest part of the boiler.

A(n) ___ is a metering device that senses the temperature of the refrigerant discharged from an evaporator and controls the amount of liquid refrigerant flowing into the evaporator.

The four systems necessary to operate a boiler are feedwater, fuel, draft, and ___.

When testing a low water fuel cutoff, the burner should shut off when ___.

The four systems necessary to operate a boiler are feedwater, fuel, draft, and ___.

An advantage of using a gate valve for isolation is that it offers little resistance to the flow of fluid through it when it is fully open.

A hazardous material is a substance that could cause injury to personnel or damage to the environment.