Theory of Machine
Which type of gearing is used in steering system of an automobile?

Rack and pinion
None of the listed here
Spiral gears
Worm and wheel

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Theory of Machine
The contact ratio is given by

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

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Theory of Machine
For dynamic balancing of a shaft

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

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