Q. Which of the following methods is not recommended for pre-cleaning prior to a liquidpenetrant test: (Solved)
1. Steam cleaning, etching, rust and paint removal
2. Solvent wipe, vapour degreasing, ultrasonic bath cleaning
3. Blasting, grinding, filing, honing, machining
4. All of the listed methods are not recommended
- d. All of the listed methods are not recommended