Civil Engineering - Waste Water Engineering
Exercise :: Waste Water Engineering - Section 1
| 31. |
Dilution method of disposing off sewage, is not preferred to |
| A. |
when sewage is fresh | | B. |
when diluting water has high dissolved oxygen content | | C. |
when diluting water is used for water supply near the point of sewage disposed | | D. |
when the diluting water is having flow currents | | E. |
none of these. |
Answer: Option C
Explanation:
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| 32. |
For house drainage minimum gradient is |
| A. |
1 in 60 | | B. |
1 in 80 | | C. |
1 in 10 | | D. |
1 in 400 |
Answer: Option A
Explanation:
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| 33. |
If the side of a square sewer is 1000 mm, the diameter of a hydraulically equivalent circular section, is |
| A. |
1045 mm | | B. |
1065 mm | | C. |
1075 mm | | D. |
1095 mm. |
Answer: Option D
Explanation:
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| 34. |
The ratio of minimum hourly flow to the average flow of sewage is |
Answer: Option B
Explanation:
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| 35. |
Bio-chemical oxygen demand (BOD) for the first 20 days in generally referred to |
| A. |
initial demand | | B. |
first stage demand | | C. |
carbonaceous demand | | D. |
all of these. |
Answer: Option D
Explanation:
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