Q. The efficiency of a screw track is maximum when its helix angle '?' is equal to (Solved)
1. 45 - ?
2. 45 - ?/2
3. Increasing the diameter of threaded portion
4. 45 + ?/2
5. 45?
- b. 45 - ?/2
1. 45 - ?
2. 45 - ?/2
3. Increasing the diameter of threaded portion
4. 45 + ?/2
5. 45?