Theory of Machine
The swaying couple is due to the

Partial balancing
Secondary unbalanced force
Two cylinders of locomotive
Primary unbalanced force

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Theory of Machine
In a four bar chain or quadric cycle chain

Each of the four pairs is a turning pair
Two are turning pairs and two are sliding pairs
One is a turning pair and three are sliding pairs
Three are turning pairs and one is a sliding 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
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
Machines modify movement and work, whereas structures modify forces

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