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Theory of Machine

Theory of Machine
What is the number of instantaneous centers for an eight link mechanism?

30
8
15
28

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Theory of Machine
In a radial cam, the follower moves

Along the cam axis
In a direction perpendicular to the cam axis
In a direction parallel to the cam axis
In any direction irrespective of the cam axis

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Theory of Machine
The fundamental equation for correct steering is (where φ and α = Angle through which the axis of the outer wheel and inner wheel turns respectively, c = Distance between the pivots of the front axles, and d = Wheel base)

tanφ + cotα = b/c
cosφ - sinα = c/b
cotφ - cotα = c/b
sinφ + sinα = b/c

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Theory of Machine
The example of spherical pair is

Lead screw of a lathe
Ball and socket joint
Ball bearing and roller bearing
Bolt and nut

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Theory of Machine
The periodic time of one oscillation for a simple pendulum is

2π. √(l/g)
(1/2π). √(l/g)
(1/2π). √(g/l)
2π. √(g/l)

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Theory of Machine
A mechanism _________ for transmitting or transforming motion.

Can not be used
None of these
Can be used
Unpredictable

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