Civil Engineering - Water Supply Engineering - Discussion

5. 

For plain chlorination of water, the quantity of chlorine used, is

[A]. 0.1 mg/litre
[B]. 0.2 mg/litre
[C]. 0.3 mg/litre
[D]. 0.4 mg/litre
[E]. 0.5 mg/litre.

Answer: Option E

Explanation:

No answer description available for this question.

Monic Kiran said: (Apr 20, 2018)  
0.3 or 0.2 is the correct answer.

Sugi said: (May 8, 2018)  
0.1 to 0.2 mg/litre for plain chlorination. So, the correct answer is 0.2.

Jay Solanki said: (Dec 29, 2018)  
And for pre-chlorination, it is 0.1.

Jay Solanki said: (Feb 21, 2019)  
For plain, chlorination its a right answer.

Ramu said: (Feb 23, 2019)  
Plain chlorination - 0.5mg/Lt.
Press chlorination - 0.1-0.5.
Post chlorination - 0.1-0.2.

Rixu said: (May 11, 2019)  
Plain chlorination - 0.5mg/Lt.
Press chlorination - 0.1-0.5.
Post chlorination - 0.1-0.2.

Kebede said: (Aug 21, 2019)  
Thanks all for explaining.

Heera said: (Sep 25, 2019)  
The normal dose of chlorine during plain chlorination is 0.5-1ppm.

It should be applied when the water is clear and its turbidity does not exceed 30 ppm.

Heera said: (Sep 25, 2019)  
The normal dose of chlorine during pre chlorination is 0.1 to 0.5 ppm.

This results in the oxidization of organic matter and reduces the amount of coagulants required in the water.

Heera said: (Sep 25, 2019)  
The normal dose of chlorine during post chlorination is 0.1-0.2ppm.

It is used for protection against contamination.

Heera said: (Sep 25, 2019)  
Super chlorination is the application of chlorine beyond the stage of the break point. It is followed by a contact period of 30-60 minutes.

Aadarsh Devkate said: (Apr 4, 2020)  
0.5 to 1 mg/l for plain chlorination.

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