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

Oscillating cylinder engine
Rotary internal combustion engine
All of these
Pendulum pump

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Theory of Machine
Cam angle is defined as the angle

Of rotation of the cam for a definite displacement of the follower
Moved by the cam from the instant the follower begins to rise, till it reaches its highest position
During which the follower returns to its initial position
Through which, the cam rotates during the period in which the follower remains in the highest position

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Theory of Machine
Which of the following statements regarding laws governing the friction between dry surfaces are correct?

The friction force is dependent on the materials of the contact surfaces.
All of these
The friction force is directly proportional to the normal force.
The friction force is independent of me area of contact.

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