| Q.34 | Which of the following is CORRECT? | |
| Ans | 1. Plug gauge is used to test accuracy of diameter of hole | |
| 2. Ring gauge is used to test accuracy of roughness of a solid shaft | ||
| 3. Ring gauge is used to test accuracy of diameter of hole | ||
| 4. Plug gauge is used to test accuracy of external diameter of shaft |
Correct Ans: 1