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Air used to atomize fuel oil is primary air.

Natural draft is regulated using ___ to control the flow of gases of combustion into a stack.

The amount of energy required to raise the temperature of 1 lb of water 1°F is 1 ___.

A boiler is given a bottom blowdown to ___.

In a direct-expansion system, the condenser can be a shell-and-coil, a shell-and-tube, or a tube-in-tube heat exchanger.

In a direct-expansion system, the condenser can be a shell-and-coil, a shell-and-tube, or a tube-in-tube heat exchanger.

The 1990 Clean Air Act Amendment is comprised of ___ titles that have the potential to affect nearly every source of air pollution.

A ___ boiler is a boiler in which heat and gases of combustion pass through tubes surrounded by water.

The purpose of the water column of a boiler is to reduce water turbulence, allowing the true boiler water level to be indicated by the water level in the gauge glass.

The purpose of the water column of a boiler is to reduce water turbulence, allowing the true boiler water level to be indicated by the water level in the gauge glass.