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

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

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Theory of Machine
The steering of a ship means

Turning of a complete ship in a curve towards right or left, while it moves forward
None of these
Rolling of a complete ship sideways
Movement of a complete ship up and down in vertical plane about transverse axis

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