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Theory of Machine

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

Surface pair
Higher pair
Sliding pair
Rolling pair

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Theory of Machine
Shaft revolving in a bearing is the following type of pair

Higher pair
Cylindrical pair
Lower pair
Spherical pair

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Theory of Machine
The amplitude of vibration is always __________ the radius of the circle.

Less than
Greater than
Equal to
None of these

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Theory of Machine
In Meyer's expansion valve, the expansion valve is driven by an eccentric having an angle of advance from

50°- 60°
80°- 90°
60°-70°
70°- 80°

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

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Theory of Machine
If the radius of gyration of a compound pendulum about an axis through e.g. is more, then its frequency of oscillation will be

Less
Same
More
Data are insufficient to determine same

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