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

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

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Theory of Machine
The contact ratio is given by

(Length of the arc of approach)/cosφ
(Length of the arc of contact)/(Circular pitch)
(Length of the path of approach)/(Circular pitch)
(Length of path of recess)/(Circular pitch)

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