Q:

Two shafts connected by a Hooke’s joint have an angle of 18 degrees between the axes.
Find the angle through which it should be turned to get the velocity ratio maximum.

A) 180 B) 30
C) 45 D) 90
 
Answer & Explanation Answer: A) 180

Explanation: Velocity ratio is ??/? = cos?/(1 – cos˛?sin˛?)
now this to be maximum cos˛? = 1
therefore ? = 0 or 180 degrees.

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