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

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

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Theory of Machine
A body is said to be under forced vibrations, when

No external force acts on a body, after giving it an initial displacement
None of these
There is a reduction in amplitude after every cycle of vibration
A body vibrates under the influence of external force

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