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

When blowing down the water column of a boiler, the water column blowdown valve is opened for 5 sec to 10 sec, allowing water and any sludge and/or sediment to be discharged.

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

Altitude pressure gauges typically have one black needle and one ___ needle.

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

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

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.