Mining Methods and Machinery · Mining Machinery · 2 marks · Numerical answer
A single-acting reciprocating ram pump runs at 120 rpm and delivers 10 L/s. Ram diameter is 150 mm and stroke 300 mm. Find volumetric efficiency in percent, to one decimal.
A single-acting pump displaces one cylinder volume per revolution. Theoretical discharge is(π×0.15²/4)×0.30×(120/60)=0.0106029 m³/s. Actual discharge is 0.010 m³/s. Efficiency is actual/theoretical×100≈94.31%, or 94.3%. A double-acting factor of 2 is not applicable.
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