Engineering exam questions wds show working

1.A wastewater sample contains 10-5.6 mmol/l of OH ions at 25° C. The pH of this sample i

2.

At a rated capacity of 44 Cumecs, a centrifugal pump develops 36 m of head when operating at 1450 rpm. Its specific speed is :

3.

If the pump head is 75 m, discharge is 0.464 m3/s and the motor speed is 1440 rpm at rated condition, the specific speed of the pump is abou

 
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