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A four-cylinder tractor engine develops 50 KW at 3000 engines when tested on a prony dynamometer on brake arm length of 96 cm. What is the torque?

a) 190.98 Nm
b) 159.15 Nm
c) 186.49 Nm
d) 155.28 Nm

Answer: b
Explanation: P = 2πNT/ 60000
T = 50*60000/ 2π*3000
T = 3000000/2*3.14*3000
T = 3000000/18840
T = 159.15 Nm.

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