MCQOPTIONS
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MCQOPTIONS
| 1. |
The permissible concentration of PM 10 in the air is ___________ |
| A. | 60 g/m<sup>3</sup> |
| B. | 40 g/m<sup>3</sup> |
| C. | 50 g/m<sup>3</sup> |
| D. | 20 g/m<sup>3</sup> |
| Answer» B. 40 g/m<sup>3</sup> | |