Machine Design and Shop Practice (MDSP) Inhouse Practice Exam 2026 – Your All-in-One Guide to Exam Success!

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In a reverted gear train, the input and output shafts are coaxial.

rotate in opposite directions

are at right angles

are at angle to each other

are coaxial

The main idea here is that a reverted gear train is arranged so that the input and output shafts lie on the same line, sharing the same axis. This means the gears are set up on a series of shafts that all line up coaxially, so the drive and the driven end end up on the same straight axis.

That’s why coaxial is the best description: despite multiple gear stages, the ends of the train align along the same axis, giving the input and output on the same shaft line. Other configurations would place the output on a different axis or orientation, such as perpendicular or offset, which isn’t a defining feature of a reverted setup.