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The crank and connecting rod of a steam engine are 0.3 m and 1.5 m in length. The crank rotates at 150 r.p.m. clockwise, determine velocity of the piston when the crank is at an angle 40 degrees from IDC.

The crank and connecting rod of a steam engine are 0.3 m and 1.5 m in length. The crank rotates at 150 r.p.m. clockwise, determine velocity of the piston when the crank is at an angle 40 degrees from IDC. Correct Answer 3.49

We know that ratio of lengths of the connecting rod and crank, n = l/r = 1.5/0.3 = 5, substituting the values into the formula of velocity V=w.r(sinθ + sin2 θ / 2n) gives V = 3.49 m/s.

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Theory of Machine mcq question image
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