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Theory of Machine

Theory of Machine
If the number of links in a mechanism is equal to l, then the numbers of possible inversions are equal to

l - 1
l
l + 1
l - 2

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Theory of Machine
The velocity of sliding of meshing gear teeth is(Where ω₁ and ω₂ are angular velocities of meshing gears and ‘y’ is distance between point of contact and the pitch point)

(ω₁ + ω₂)/y
(ω₁ × ω₂) y
(ω₁ + ω₂) y
(ω₁/ω₂) y

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Theory of Machine
The dynamic friction is the friction experienced by a body, when the body

Is at rest
Is in motion
Just begins to slide over the surface of the other body
None of these

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Theory of Machine
When two links are connected by a pin joint, their instantaneous center lies

At the center of circle
On their point of contact
At the center of curvature
At the pin joint

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

Can not be used
Can be used
Unpredictable
None of these

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Theory of Machine
With usual notations for different parameters involved, the maximum fluctuations of energy for a flywheel is given by

EC S/2
2ECS
2ECS²
2E²CS

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