Theory of Machine
Which of the following is an inversion of a double slider crank chain?

Elliptical trammel
Oldham's coupling
All of these
Scotch yoke mechanism

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Theory of Machine
Kinematic pairs are those which have

Two elements that permit relative motion
Surface contact between the two elements when in motion
Point or line contact between the two elements when in motion
Elements of pairs not held together mechanically

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Theory of Machine
In a cone pulley, if the sum of radii of the pulleys on the driving and driven shafts is constant, then

The drive is recommended depending upon the torque transmitted
Open belt drive is recommended
Both open belt drive and crossed belt drive is recommended
Crossed belt drive is recommended

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