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.

A boiler vent must be closed during warm-up to prevent pressure from escaping.

The function of an automatic makeup water feeder is to replace water that has been lost.

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.

The function of an automatic makeup water feeder is to replace water that has been lost.

Dissolved solids are impurities such as calcium, silica, and iron dissolved in solution.

The American Boiler Manufacturer’s Association (ABMA) is a national organization that represents manufacturers of commercial, industrial, and utility steam generating and fuel burning equipment and suppliers.

The American Boiler Manufacturer’s Association (ABMA) is a national organization that represents manufacturers of commercial, industrial, and utility steam generating and fuel burning equipment and suppliers.

Dissolved solids are impurities such as calcium, silica, and iron dissolved in solution.

Dissolved solids are impurities such as calcium, silica, and iron dissolved in solution.