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Theory of Machine

Theory of Machine
For fluctuating loads, well suited bearing is

Ball bearing
Roller bearing
Needle roller bearing
Thrust bearing

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Theory of Machine
A spring controlled governor is said to be unstable when the controlling force

Decreases as the radius of rotation increases
Increases as the radius of rotation decreases
Increases as the radius of rotation increases
Remains constant for all radii of rotation

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Theory of Machine
The C.G. of a link in any mechanism would experience

Both angular and linear accelerations
No acceleration
Linear acceleration
Angular acceleration

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Theory of Machine
A point on a connecting link (excluding end points) of a double slider crank mechanism traces a

Elliptical path
Straight line path
Parabolic path
Hyperbolic path

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Theory of Machine
In a simple harmonic motion, the velocity vector with respect to displacement vector

Lags by 90°
Leads by 180°
Is in phase
Leads by 90°

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Theory of Machine
If there are L number of links in a mechanism, then number of possible inversions is equal to

L + 2
L
L - 1
L + 1

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