Consider the following statements regarding instantaneous centres:
1. The angle of approach is defined as the angle through which a gear rotates from the instant a pair of teeth comes into contact until the teeth are in contact at the pitch point.
2. The angle of recess is the angle through which a gear rotates from the instant the teeth are in contact at the pitch point until the contact is broken.
3. In general, the angle of approach is equal to the angle of recess.
Which of the above statements are correct?

Question

Examsnet · Accepted Answer

Correct Answer is : 1 and 2 only

UPSC ESE 2025 Mechanical Engineering Paper