Q. According to ASTM E709-95 before turning off current and examination, dry powderin excess shall be: (Solved)
1. Removed by a dry-air current
2. Kept in place
3. All of the above
4. None of the above
- d. None of the above
1. Removed by a dry-air current
2. Kept in place
3. All of the above
4. None of the above