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

A safety inspector is a person who is trained in, and has specific knowledge of, the construction and operation of electrical equipment or a specific task, and is trained to recognize and avoid electrical hazards that might be present with respect to the equipment or specific task.

A safety inspector is a person who is trained in, and has specific knowledge of, the construction and operation of electrical equipment or a specific task, and is trained to recognize and avoid electrical hazards that might be present with respect to the equipment or specific task.

Perfect combustion is combustion that occurs when all the fuel is burned with a minimum amount of excess air remaining.

Priming and carryover or a failed steam trap can lead to water hammer and possible pipe rupture.

The water level in a gauge glass should be out of sight during bottom blowdown.

A(n) ___ is a component directly attached to a boiler that is required for the operation of the boiler.

___ combustion occurs when all fuel burns using only the theoretical amount of air.

A package boiler is a self-contained unit that is preassembled at a factory.

Balanced draft is a mechanical draft from fans located before and after a boiler furnace.