Theory of Machine
In a multiple V-belt drive, when a single belt is damaged, it is preferable to change the complete set to

Ensure proper alignment
Reduce vibration
Reduce slip
Ensure uniform loading

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

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

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Theory of Machine
In a cam drive with uniform velocity follower, the sharp corners of the displacement diagram are rounded off at the beginning and at the end of each stroke. This is done

Because of loose contact of follower with cam surface
In order to have acceleration in beginning and retardation at the end of stroke within the finite limits
Because of difficulty in manufacturing cam profile
Because the uniform velocity motion is a partial parabolic motion

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