Theory of Machine
To connect two parallel and coplanar shafts the following type of gearing is used

Bevel gear
Spiral gear
None of the listed here
Spur gear

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Theory of Machine
For dynamic balancing of a shaft

The net dynamic force acting on the shaft is equal to zero
None of these
The net couple due to the dynamic forces acting on the shaft is equal to zero
Both (A) and (B)

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