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Theory of Machine

Theory of Machine
If two moving elements have surface contact in motion, such pair is known as

Sliding pair
Rolling pair
Higher pair
Surface pair

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Theory of Machine
Longitudinal vibrations are said to occur when the particles of a body moves

Perpendicular to its axis
None of these
In a circle about its axis
Parallel to its axis

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Theory of Machine
A rotary internal combustion engine has __________ cylinders.

Six
Four
Five
Seven

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Theory of Machine
A mechanism consisting of four links is called a __________ mechanism.

None of these
Binary
Simple
Compound

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Theory of Machine
The size of cam depends upon

Prime circle
Pitch curve
Pitch circle
Base circle

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Theory of Machine
When the addenda on pinion and wheel is such that the path of approach and path of recess are half of their maximum possible values, then the length of the path of contact is given by (where r = Pitch circle radius of pinion, R = Pitch circle radius of wheel, and φ = Pressure angle)

[(r + R) sinφ]/2
[(r + R) cosφ]/2
[(r² + R²) sinφ]/2
[(r² + R²) cosφ]/2

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