Machine Design
In skew bevel gearing, the axes of shafts are

Non-intersecting and non-parallel and the teeth are straight
Non-intersecting and nonparallel and the teeth are curved
None of these
Intersecting and the teeth are curved

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Machine Design
Crowning on pulley helps

In increasing the slip of the belt
To keep the belt in centre on a pulley while it is in motion
To increase pulley life
In decreasing the slip of the belt

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