Hydraulic Machines - Section 1 (4)

The discharge of a double acting reciprocating pump is (where L = Length of stroke, A = Cross-sectional area of piston, and N = Speed of crank in r.p.m.)

Delivery head of water of a centrifugal pump is inversely proportional to diameter of its impeller.

The unit discharge through the turbine is

The discharge of a centrifugal pump working under constant head __________ with the speed.

The efficiency of a Pelton wheel working under constant head __________ with the increase in power.

Which of the following pump is preferred for flood control and irrigation applications?

Theoretical power required (in watts) to drive a reciprocating pump is (where w = Specific weight of liquid to be pumped in N/m³, Q = Discharge of the pump in m³/s, H_s = Suction head in metres, and H_d = Delivery head in metres)

The specific speed of a centrifugal pump, delivering 750 litres of water per second against a head of 15 metres at 725 r.p.m., is