engineering recuitment OPSC Assistant Industries Officer Mock Test 2025 Production Engineering (Manufacturing) Metal Forming Sheet Metal Operation
A hole of diameter d is to be punched in a plate of thickness t. For the plate material, the maximum crushing stress is 4 times the maximum allowable shearing stress. For punching the biggest hole, the ratio of diameter of hole to plate thickness should be equal to
1
1/4
2
1/2
3
1
4
2