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

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

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Theory of Machine
The static balancing is satisfactory for low speed rotors but with increasing speeds, dynamic balancing becomes necessary. This is because, the

Unbalanced forces are not dangerous at higher speeds
Effects of unbalances are proportional to the square of the speed
Unbalanced couples are caused only at higher speeds
Effects of unbalances are directly proportional to the speed

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