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Mr. Dubey • 100.64K Points
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Q. Operation of helical gears is silent and quiet while the operation of the spur gears is noisy because

  • (A) helical gears have some helix angle but the spur gears are straight
  • (B) there is end thrust in helical gears
  • (C) in helical gears, contact begins at one end of the entering tooth and gradually extends along a diagonal line across the tooth face as the gears rotate
  • (D) none of the above
  • Correct Answer - Option(C)
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  • Filed under category Machine Design
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