Civil Engineering - Waste Water Engineering
Exercise :: Waste Water Engineering - Section 1
| 11. |
Pick up the correct statement from the following : |
| A. |
In treated sewage, 4 PPm of D.O. is essential | | B. |
Only very fresh sewage contains some dissolved oxygen | | C. |
The solubility of oxygen in sewage is 95% that is in distilled water | | D. |
All the above. |
Answer: Option D
Explanation:
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| 12. |
In olden days the type of section adopted in trunk and out fall sewers was |
| A. |
parabolic shaped | | B. |
horse shoe shaped | | C. |
egg shaped | | D. |
circular shaped. |
Answer: Option B
Explanation:
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| 13. |
For the survival of fish in a river stream, the minimum dissolved oxygen is prescribed |
Answer: Option B
Explanation:
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| 14. |
In a fully mechanised composting plant, involves |
| A. |
mechanized receipt | | B. |
mechanized segregation | | C. |
mechanized pulverising of refuse | | D. |
all of these. |
Answer: Option D
Explanation:
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| 15. |
Self-cleansing velocity is |
| A. |
velocity at dry weather flow | | B. |
velocity of water at flushing | | C. |
velocity at which no accumulation remains in the drains | | D. |
velocity of water in a pressure filter. |
Answer: Option C
Explanation:
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