Measurement of brake power by prony brake dynamiter, Mechanical Engineering

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a) Illustrate with neat and clean diagram the measurement of brake power by prony brake Dynamiter OR Belt transmission type Dynamiter.

b) A torsion dynamometer is fixed to a propeller shaft of a marine engine. It is found that the shaft twist 2 degree in a length of 20 meter at 120rpm. If the shaft is hollow with 40cm external diameter and, 30cm internal diameter Evaluate the power of the engine. Take modulus of rigidity for the shaft material as 8×10N/m2.


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