Theory of Machine
In a kinematic chain, a quaternary joint is equivalent to

Two binary joints
Four binary joints
One binary joint
Three binary joints

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Theory of Machine
A thin circular disc is rolling with a uniform linear speed, along a straight path on a plane surface. Which of the following statement is correct in this regard?

All points of the disc have the same velocity
The centre of the disc has centrifugal acceleration
The point on the disc making contact with the plane surface has zero acceleration
The centre of the disc has zero acceleration

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Theory of Machine
Crowning on pulleys helps

For automatic adjustment of belt position so that belt runs centrally
Increase belt and pulley life
In increasing velocity ratio
In decreasing the slip of the belt

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