MCQOPTIONS
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| 1. |
If the diameter of a sewer is 100 mm, the gradient required for generating self cleansing velocity, is |
| A. | greater than 0.1 mm. |
| B. | 1 in 60 |
| C. | 1 in 100 |
| D. | 1 in 120 |
| Answer» B. 1 in 60 | |