The efficiency of a hydraulic press is given by (where W = Weight lifted by ram, P = Force applied on plunger, A = Area of ram and a = Area of plunger)

An object having 10 kg mass weighs 9.81 kg on a spring balance. The value of 'g' at this place is

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.)

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