In a constant pressure relay, first the flow, the ...

Fire Apparatus Driver/Operator - Pumper End Of Course Exam Test

Question Number 25

In a constant pressure relay, first the flow, the number of pumpers needed, and hose size are determined. While the attack pumper starts with its internal tank, the largest capacity pumper is stationed at the hydrant and hooked-up, and all apparatus are connected. At that point, the next step for establishing a constant pressure relay is to have:

A. The source pumper start pumping water at 175 psi

B. The attack pumper adjust discharge pressure to supply attack lines

C. Each relay pumper close its discharge valve once a steady flow of water reaches it, then advance throttle to 175 psi

D. all pumpers, except the source pumper, open their discharge valves on dump line (Correct Answer)

✔ Correct Answer:

D. all pumpers, except the source pumper, open their discharge valves on dump line (Correct Answer)

Fire Apparatus Driver/Operator - Pumper End Of Course Exam Test

Question Number 25

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