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A fan manufacturer rates his fans at 152 mm water gage static pressure for 10 m3 of air per second at 21C, 1200 rpm and

Posted: Mon May 09, 2022 9:48 am
by answerhappygod
A fan manufacturer rates his fans at 152 mm water gage static
pressure for 10 m3 of air per second at 21C, 1200 rpm and
static efficiency of 69%. At what speed would these fans operate to
develop 130 mm water gage when the temperature is 316C?
A. 1570.8 rpm B. 975.8 rpm C. 837.5 rpm D. 1129.5 rpm