Consider the following statements:
1. In spur gears, the contact occurs abruptly on a line parallel to the axis, and the disengagement too is abrupt.
2. In helical gears, both loading and unloading are gradual, and therefore, these happen more smoothly and less noisily.
3. When two gears mesh, any arbitrary shape of the tooth can be chosen for the profile of the teeth of any one of the two gears, and the profile for the other shall be obtained by applying the law of gearing.
Which of the above statements are correct?

Question

Examsnet · Accepted Answer

Correct Answer is : 1 and 2 only

UPSC ESE 2018 Mechanical Engineering Paper