Theory of Machine
Whitworth quick return mechanism is obtained by inversion of

Slider crank mechanism
Five link mechanism
Roller cam mechanism
Kinematic chain

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Theory of Machine
In a single slider crank chain

Three are turning pairs and one is a sliding pair
Two are turning pairs and two are sliding pairs
One is a turning pair and three are sliding pairs
Each of the four pairs is a turning pair

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

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

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