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If it desired to obtain 160 kgm torque at the transmission output shaft, what gear ratio would be necessary if transmission efficiency is 96% and the input torque is 15 kg m?

a) 1:10
b) 1:11
c) 1:12
d) 1:13

Answer: b
Explanation: Torque at transmission input shaft = 15 * \(\frac{96}{100}\) = 14.4 kg-m
Required gear ratio = \(\frac{14.4}{160}\) = 1:11

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