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Why are the helical gears used commonly in transmission over spur gears?(a) Low cost and high strength(b) Low noise level and high strength(c) Low noise level and economy(d) Low noise level and low costThe question was posed to me in an online interview.The doubt is from Transmission System topic in portion Chassis & Transmission System of Automobile Engineering

Answer» CORRECT option is (b) Low noise level and high STRENGTH

The BEST explanation: The TEETH profile on the helical gear is at an angle to the axis of the gear because of which helical gears produce less noise during OPERATION and also they have high strength.


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