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__________________?

Related Mcqs:

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

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

2. 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...

3. The formula which accepts the value of rugosity coefficient n = 0.012 to be used in Manning’s formula, is given by______________________?

   A. Bazin B. Crimp and Bruges C. William-Hazen D. Kutter...

4. For estimating the peak run off the rational formula Q = 0.0278 KpA was evolved by______________?

   A. Kinchling B. Lloyd Davis C. Frubling D. All the above...

5. 3.0 ml of raw sewage is diluted to 300 ml. The D.O. concentration of the diluted sample at the beginning of the test was 8 mg/l. After 5 day-incubation at 20°C, the D.O. concentration was 5 mg/l. The BOD of raw sewerage is______________________?

   A. 100 mg/l B. 200 mg/l C. 300 mg/l D. 400 mg/l...

6. 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...

7. For house drainage minimum gradient is__________________?

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

8. 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...

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

   A. Leaping weir B. Overflow weir C. Siphon spill way D. None of these...

10. 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...