Theory of Machine
In a steam engine, one method of obtaining the earlier cut-off with a simple slide valve is by increasing the angle of advance of the eccentric while the throw of the eccentric, steam lap and exhaust lap are kept constant. This method will

Cause withdrawing or throttling of steam
All of these
Reduce maximum opening of port to steam
Reduce length of effective stroke of piston

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

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

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