Civil Engineering - UPSC Civil Service Exam Questions - Discussion

2. 

Which one of the following related to domestic potable water quality is correct?

[A]. Turbidity (on Silica scale) is 15-20 ppm or mg/lit.
[B]. Colour (on Cobalt scale) is 15-25 ppm or mg/lit.
[C]. Hardness (expressed as Ca CO3 equivalent) is 75-115 ppm or mg/lit
[D]. BOD is 20 ppm or mg/lit

Answer: Option C

Explanation:

No answer description available for this question.

Pratik said: (Aug 24, 2019)  
Total hardness - 75-115mg/l.
Chloride - 250mg/l.
Fluorides - 0.5mg/l.
Nitrates - 45-100mg/l.
Magnesium - 30mg/l.
Iron - 0.3 mg/l.
Total diaolved solid - 450mg/l.
Turbidity - 5-10mg/l.
And pH -> 6.5-8.5.

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