Civil Engineering - Waste Water Engineering
Exercise :: Waste Water Engineering - Section 3
| 1. |
The pH value of fresh sewage is usually |
| A. |
equal to 7 | | B. |
more than 7 | | C. |
less than 7 | | D. |
equal to zero. |
Answer: Option B
Explanation:
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| 2. |
The moisture content of a sludge is reduced from 90% to 80% in a sludge digestion tank. The percentage decrease in the volume of sludge, is |
Answer: Option B
Explanation:
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| 3. |
Inter-distance between ventilation columns in a sewer line is kept |
| A. |
25 to 50 m | | B. |
50 m to 100 m | | C. |
100 m to 150 m | | D. |
150 m to 300 m. |
Answer: Option D
Explanation:
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| 4. |
If q is the average sewage flow from a city of population P, the maximum sewage flow |
Answer: Option C
Explanation:
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| 5. |
The factor responsible for purification of sewage in river is |
| A. |
Hydrology | | B. |
Dissolved oxygen in water | | C. |
Temperature | | D. |
Turbulence | | E. |
All the above. |
Answer: Option E
Explanation:
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