In fire service terminology, what is the common name for each pump impeller housed in a housing?

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Prepare for the Apparatus Operator/Pumper Test. Utilize flashcards and multiple-choice queries, complete with hints and explanations. Ensure success on your exam!

Multiple Choice

In fire service terminology, what is the common name for each pump impeller housed in a housing?

Explanation:
In a centrifugal fire pump, each unit that combines one impeller with its own diffuser/housing is called a stage. Stacking stages lets the pump build higher pressure, since each stage adds head as the fluid passes through successive impellers and housings. The rotating component itself is often referred to as the rotor, but the specific unit consisting of an impeller plus its housing is called a stage. The other terms don’t fit this context: runner is used in turbine terminology, and disk isn’t the standard term for this pump assembly.

In a centrifugal fire pump, each unit that combines one impeller with its own diffuser/housing is called a stage. Stacking stages lets the pump build higher pressure, since each stage adds head as the fluid passes through successive impellers and housings. The rotating component itself is often referred to as the rotor, but the specific unit consisting of an impeller plus its housing is called a stage. The other terms don’t fit this context: runner is used in turbine terminology, and disk isn’t the standard term for this pump assembly.

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