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.Management Sciences
A. A sedimentation tank and an activated sludge treatment plant
B. A plant consisting of Imhoff tanks with low rate trickling filters
C. Sedimentation tanks with high rate trickling filters
D. None of these
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- ¾th or ¼th extra space is left in sewer pipes at maximum discharge for_________________?
- A. Low estimates of the average and maximum flows B. Large scale infiltration of storm water C. Unexpected increase in population D. All the above...
- The most widely used pump for lifting sewage is_________________?
- A. Centrifugal pump B. Reciprocating pump C. Pneumatic ejector D. Air pressure pump...
- The design period of sewage treatment works in normally_________________?
- A. 5 – 10 years B. 15 – 20 years C. 30 – 40 years D. 40 – 50 years...
- For detecting the nitrites in the sewage, the matching colour may be developed by adding_________________?
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- Assertion A.: A free board of 0.3 m is provided above the top sewage line in septic tanks. Reason (R): It helps to accommodate the scum in the septic tank_________________?
- A. Both A and R is true and R is the correct explanation of A B. Both A and R is true but R is not a correct explanation of A C. A is true but R is false D. A is false but R is true...
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