Theory of Machine
The arrangement is called bevel gearing, when two __________ are connected by gears.

Parallel and coplanar shafts
Parallel and non-coplanar shafts
Non-intersecting and non-coplanar shafts
Intersecting and coplanar shafts

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Theory of Machine
Lower pairs are those which have

Elements of pairs not held together mechanically
Point or line contact between the two elements when in motion
Two elements that permit relative motion
Surface contact between the two elements when in motion

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