Gear pumps are widely used positive-displacement pumps because of their simple design and ease of repair.

When a circulating pump is not operating, the flow control valve closes to prevent natural circulation.

When an increase in steam pressure is required, the ___ activates the programmer to start a purge cycle and lights the pilot light.

Fuel oil atomization temperature varies with the fuel oil grade and burner.

Fuel oil atomization temperature varies with the fuel oil grade and burner.

A boiler room contains many combustible materials, and boiler room fire safety requires established procedures to reduce or eliminate conditions that could cause a fire.

A(n) ___ is an air pressure-activated switch that closes after proving sufficient pressure of combustion air from the forced draft fan.

A vacuum pump is equipped with check valves on both sides of the piston so that the pump moves fluid when the reciprocating component is moving in either direction.

Without condensate in a surge tank, the low water alarm on the tank should sound.

A low limit control is a pressure control that senses steam pressure and automatically shuts down a burner if the operating control fails.