Theory of Machine
In which of the following type of gear train the first gear and the last gear are co-axial.

Simple gear train
Compound gear train
None of the listed here
Reverted gear train

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Theory of Machine
In a single slider crank chain

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

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