A. 1 in 60
B. 1 in 80
C. 1 in 10
D. 1 in 400
Related Mcqs:
- 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 - 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 - If the diameter of a sewer is 100 mm, the gradient required for generating self cleansing velocity is__________________?
A. 1 in 60
B. 1 in 100
C. 1 in 120
D. None of these - The rational formula for peak drainage discharge, was evolved by_________________?
A. Fruhling
B. Lloyd David
C. Kuichling
D. All of these - 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 - 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 - 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 - 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 - In circular sewers if depth of flow is 0.2 times the full depth, the nominal gradient,______________?
A. Is only provided
B. Is doubled
C. Is trebled
D. Is not enough - If the diameter of a sewer is 150 mm, the gradient required for generating self cleansing velocity, is________________?
A. 1 in 60
B. 1 in 100
C. 1 in 120
D. None of these
