SSC JE Civil Engineering 25-Sep-2019 Shift 1 Solved Paper

Question : 136 of 200

Marks: +1, -0

The maximum permissible value of organic solids in water, used for the preparation of concrete as per IS 456 : 2000 is:

2000 mg/l
500 mg/l
200 mg/l
3000 mg/l

Solution:

The permissible limits for dissolved solids per litre of water as specified in IS : 456-2000 are as under.
Organic solids not more than 200 mg/litre, inorganic solids not more than 3000 mg/litre, sulphate as SO

_3

not more than 400 mg/litre and chlorides not more than 2000 mg/litre. According to standards of WHO only 500 mg of dissolved solids are allowed.

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