Q.

Rotary pumps are driven by                    

A. electric motors
B. batteries
C. diesel engines
D. biogas fuel
Answer» A. electric motors
Explanation: rotary pumps are driven by electric motors. water is pumped due to rotary action of the impeller. rotary pumps are invented by charles c barnes. it is a positive displacement pump. the efficiency of these pumps depends on the percentage of slip to the total quantity displaced.
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