Moderate
Pollution by particulate matter emission in the atmosphere does not take place during metal____________________?
Correct answer: D. Polishing
- A. Grinding
- B. Machining
- C. Cutting
- D. Polishing
Explanation
Metal grinding, machining and cutting can fracture or remove metal and generate airborne particulate matter. Polishing generally produces much less particulate emission than these material-removal operations, so it is the intended exception.
Written and checked by Zahid Hussain, MS Computer ScienceLast updated
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