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| Q. |
Which of the following involves in the sequence of rocky strata? |
| A. | marking profile |
| B. | placing rocks |
| C. | improving foul gases |
| D. | recording values |
| Answer» A. marking profile | |
| Explanation: rocky strata involve usage of blasting method for developing tunnels. the sequence contains marking profile, loading explosive, removing foul gases, checking, scaling, mucking and bolting. | |
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