Q. A wire brush should be used for pre-cleaning: (Solved)
1. When grease and oil must be removed
2. Only as a last resort
3. When rust is to be removed
4. When grinding burrs must be removed
- c. When rust is to be removed
1. When grease and oil must be removed
2. Only as a last resort
3. When rust is to be removed
4. When grinding burrs must be removed