Civil Engineering - Waste Water Engineering - Discussion

Discussion Forum : Waste Water Engineering - Section 2 (Q.No. 15)
15.
In a city the ratio of the drainage to sewage is 20, the percentage discharge passing through non-monsoon periods, is
5
10
15
20
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
16 comments Page 1 of 2.

Pavan ingaleshwar said:   3 years ago
It's correct during non-monsoon periods only 1/20th to 1/30th of design discharge will be passing through the sewers if the combined system is adopted.

Evasu said:   5 years ago
21 = 100%.
1 = 100/21.
4.76 = 100 * 4.76/21 = 22 = 20.

Biswajit sardar said:   6 years ago
Qd/Qs=20.
So, Qd=20xQs.
Q= Qd+Qs.
Q= 20Qs+Qs. = 21Qs.
(3)

Keerthana said:   6 years ago
Please explain the correct answer.

Anomies said:   6 years ago
How come 21 here?

Sajid said:   6 years ago
Ans is 5.

Q= Qd+ Qs = 21 Qs (wet weather) and Q =0 +Qs in dry weather. So discharge in dry weather is (1/21) * 100 = approx 5%

Sachin said:   6 years ago
It should be 5.

Alvin A. said:   7 years ago
Why 5, can you explain?

Pawan said:   7 years ago
5 is correct answer.

Garry said:   7 years ago
I think the answer is 5.


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