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

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

## Theory of Machine Which of the following property of the instantaneous center is correct?

A rigid link rotates instantaneously relative to another link at the instantaneous centre for the configuration of the mechanism considered.
The two rigid links have no linear velocity relative to each other at the instantaneous centre.
The velocity of the instantaneous centre relative to any third rigid link is same whether the instantaneous centre is regarded as a point on the first rigid link or on the second rigid link.
All of these

None of these
m₁ r₂ = m₂ r₁
m₁ r₁ = m₂ r₂
m₁ m₂ = r₁ r₂

## Theory of Machine The power of a Porter governor is equal to

[3c²/(1 + 2c)] (m + M) g.h
[4c²/(1 + 2c)] (m + M) g.h
[c²/(1 + 2c)] (m + M) g.h
[2c²/(1 + 2c)] (m + M) g.h

## Theory of Machine When the two elements of a pair have __________ when in motion, it is said to a lower pair.

Line or point contact
Surface contact
None of these
Body contact

## Theory of Machine The frictional torque transmitted by a disc or plate clutch is same as that of

Flat pivot bearing
Truncated conical pivot bearing
Conical pivot bearing
Flat collar bearing