Practice question

What is the primary purpose of the priming pump on a centrifugal-pump-equipped fire apparatus?

  1. Boost discharge pressure during pumping
  2. Evacuate air from the pump and intake hose to allow drafting
  3. Cool the engine when pumping
  4. Provide auxiliary cooling water to the impeller

Answer: B — Evacuate air from the pump and intake hose to allow drafting

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