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| Q. |
What happens to the process efficiency if plasma plumes are formed in LBM? |
| A. | increases |
| B. | enhances |
| C. | decreases |
| D. | improves |
| Answer» C. decreases | |
| Explanation: in laser beam machining, the process efficiency is reduced due the absorption and scattering loses when plasma plumes are formed. | |
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