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Question
A solid circular shaft is to transmit a power, P kW, when turning N revolutions per min. For a given maximum shear stress, the shaft diameter will be proportional to
A.
(P/N)0.31
B.
(P/N)0.33
C.
(P/N)0.67
D.
(P/N)3
Answer ( Option B)

(P/N)0.33

Solution

For maximum shear stress -
Power transmit by shaft -

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