## Theory of Machine Which of the following is false statement in respect of differences between machine and structure?

In machines, relative motion exists between its members, whereas same does not exist in case of structures
Machines modify movement and work, whereas structures modify forces
Machines transmit mechanical work, whereas structures transmit forces
Efficiency of machines as well as structures is below 100 %

3 laws
1 law
2 laws
4 laws

## Theory of Machine Which of the following is an example of a higher pair?

All of the listed here
Ball and roller bearing
Toothed gearing
Belt and rope drive

Hammer blow
Tractive force
Swaying couple
None of these

## Theory of Machine Cam angle is defined as the angle

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

Double
Three times
Two-third
One-third