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Question

# A Pump supplies oil at 0.002m3/sec. to a 50 mm diameter double acting cylinder and a rod diameter is 20 mm. If the load is 6000 N bolts in extending and retracting stroke. Power during extension stroke and return stroke are

A
6.12 KW, 7.28 KW
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B
6.12 KW, 12.4 KW
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C
5.4 KW, 10.2 KW
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D
10.2 KW, 12.4 KW
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Solution

## The correct option is A 6.12 KW, 7.28 KWCylinder power stroke during extension stroke Pext=Pin×Qin 30.6×106×0.0021000=6.12KW Cylinder power stroke during return stroke P2=Pin2×Qin2 =36.4×106×0.0021000 =7.28KW.

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