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

If the automatic makeup water feeder on the surge tank fails to supply water to the tank, the ___ will shut off the feedwater pump in order to protect the pump.

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.

___ pressure is the pressure caused by the weight of air surrounding the earth.

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

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 ___.