Question: 6. A high rise building has a pump located at ground level that produces 160 psig at the pump outlet at churn and 150 psig

6. A high rise building has a pump located at ground level that produces 160 psig at the pump outlet at churn and 150 psig at the design sprinkler system flow. The standpipe is oversized so that friction losses are negligible in the riser. The pump must be able to supply a minimum of 47 psig to the sprinkler system located on the 18th floor (sprinklers are located at the ceiling, 185-ft above ground level). The pump is set to operate when a pressure switch mounted at the pump outlet senses that the pressure has dropped to below 90 psig. Once operating, can the pump adequately supply the sprinkler system on the 18th floor? Will the pump start automatically

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