The gas which may cause explosion in sewers, is_________________?

Related Mcqs:

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...

In normal conditions, the period for sludge digestion, is_______________?

A. 10 days B. 20 days C. 30 days D. 60 days...

A cylindrical ejector having its height 2 m fills after every 10 minutes with a peak sewage discharge of 0.0157 cumec. The diameter of the ejector chamber, is_____________________?

A. 2.30 m B. 2.40 m C. 2.45 m D. 2.50 m...

Large diameter sewers subjected to external pressure alone, are reinforced ______________________?

A. Near the inner surface of the pipe B. Near the outer surface of the pipe C. Both A. and B. D. With elliptical cage...

In primary sedimentation, the 0.2 mm inorganic solids get separated if specific gravity is_________________?

A. 2.25 B. 2.50 C. 2.55 D. 2.65...