The most effective arrangement for diverting excess storm water into a natural drainage, is____________________?

Related Mcqs:

1. If D.O. concentration falls down to zero in any natural drainage, it indicates the zone of__________________?

   A. Degradation B. Active decomposition C. Recovery D. Cleaner water...

2. If the peak discharge of a storm water drain (S.W. Drain) is expected to exceed 150 cumecs, the free board to be provided, is_________________?

   A. 100 cm B. 90 cm C. 80 cm D. 50 cm...

3. For drainage pipes in buildings the test applied before putting them to use, is__________________?

   A. Water test B. Smoke test C. Straightness test D. All the above...

4. The drainage area of a town is 12 hectares. Its 40% area is hard pavement ( K = 0.85), the 40% area is unpaved streets (K = 0.20) and the remaining is wooded areas (K = 0.15). Assuming the time of concentration for the areas as 30 minutes and using the formula Ps = 900/(t + 60) the maximum run off is__________________?

   A. 0.10 cumec B. 0.12 cumec C. 0.15 cumec D. 0.20 cumec...

5. The rational formula for peak drainage discharge, was evolved by_________________?

   A. Fruhling B. Lloyd David C. Kuichling D. All of these...

6. For house drainage minimum gradient is__________________?

   A. 1 in 60 B. 1 in 80 C. 1 in 10 D. 1 in 400...

7. When drainage to sewage ratio is 20, the peak dry weather flow is_______________?

   A. 20% of the design discharge B. Slightly less than 5% of the design discharge C. Slightly more than 5% of the design discharge D. None of these...

8. In a city the ratio of the drainage to sewage is 20, the percentage discharge passing through non-monsoon periods, is_____________________?

   A. 5 B. 10 C. 15 D. 20...

9. The arrangement made for passing the sewer line below an obstruction below the hydraulic gradient lines called ____________________?

   A. Inverted syphon B. Depressed sewer C. Sag pipe D. all of these...

10. The surface tension of mercury at normal temperature compared to that of water is____________________?

    A. more B. less C. same D. more or less depending on size of glass tube E. none of the above....