In the design of spur gear, the load-distribution factor can be minimized by specifying which of the following?
1. Accurate teeth
2. Narrow face widths
3. Long shaft spans between bearings
Select the correct answer using the code given below:
1
1 and 2 only
2
1 and 3 only
3
2 and 3 only
4
1, 2 and 3