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Theory of Machine

Theory of Machine
The mechanism forms a structure, when the number of degrees of freedom (n) is equal to

-1
1
2

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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)

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

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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 pin joint
At the center of curvature

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Theory of Machine
The example of completely constrained motion is a

Motion of a square bar in a square hole
Motion of a shaft with collars at each end in a circular hole
Motion of a piston in the cylinder of a steam engine
All of these

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Theory of Machine
In a coupling rod of a locomotive, each of the four pairs is a ________ pair.

Turning
Screw
Rolling
Sliding

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Theory of Machine
The frictional torque transmitted in a flat pivot bearing, assuming uniform wear, is (Where μ = Coefficient of friction, W=Load over the bearing, R=Radius of bearing)

½μWR
¾μWR
μwr
²/₃ μWR

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