Theory of Machine
In multi V-belt transmission, if one of the belt is broken, we have to change the

All the belts
Broken belt
Broken belt and its adjacent belts
There is no need of changing any one as remaining belts can take care of transmission of load

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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
Reduce length of effective stroke of piston
Reduce maximum opening of port to steam
All of these

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