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Theory of Machine

Theory of Machine
The locus of a point on a thread unwound from a cylinder will be

Involute
Cycloidal
A straight line
A circle

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Theory of Machine
The natural frequency of free transverse vibrations due to a point load acting over a simply supported shaft is equal to (where δ = Static deflection of a simply supported shaft due to the point load)

0.6253/√δ
0.571/√δ
0.4985/√δ
0.5615/√δ

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Theory of Machine
The mechanism in which two are turning pairs and two are sliding pairs, is called a

Elliptical trammel
Double slider crank chain
All of these
Scotch yoke mechanism

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Theory of Machine
The sense of Coriolis component is such that it

Lags the sliding velocity vector by 90°
Leads the sliding velocity vector by 90°
Is along the sliding velocity vector
Leads the sliding velocity vector by 180°

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Theory of Machine
The velocity of the rubbing surface __________ with the distance from the axis of the bearing.

Remain same
Decreases
None of these
Increases

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Theory of Machine
The values of velocity and acceleration of piston at near dead center for a slider-crank mechanism will be

0, 0
cor, 0
0, and more than co2r
0, and less than coV

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