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Which types of gears are used in constant mesh gearbox?

(a) Spur gear

(b) Helical gear

(c) Bevel gear

(d) Worm gear

I had been asked this question in an online quiz.

My question is taken from Transmission System topic in section Chassis & Transmission System of Automobile Engineering

1 Answer

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Correct choice is (b) Helical gear

To explain: As the gears are always in mesh in the constant-mesh gearbox, therefore there is no need for using the spur gears and the helical gears are used as those are quite in use.

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