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Q: As per IS 456 :2000, the permissible limit for inorganic solids present in water that is used for construction activities is ____
  • A. 1100 mg/l
  • B. 2400 mg/l
  • C. 150 mg/l
  • D. 3000 mg/l
Correct Answer: Option D - As per IS 456:2000, clause 5.4 Type of solid Max. permissible limit Organic 200 mg/l Inorganic 3000 mg/l Sulphates 400 mg/l Chlorides 2000 mg/l (PCC) Chlorides 500 mg/l (RCC) Suspended matter 2000 mg/l
D. As per IS 456:2000, clause 5.4 Type of solid Max. permissible limit Organic 200 mg/l Inorganic 3000 mg/l Sulphates 400 mg/l Chlorides 2000 mg/l (PCC) Chlorides 500 mg/l (RCC) Suspended matter 2000 mg/l

Explanations:

As per IS 456:2000, clause 5.4 Type of solid Max. permissible limit Organic 200 mg/l Inorganic 3000 mg/l Sulphates 400 mg/l Chlorides 2000 mg/l (PCC) Chlorides 500 mg/l (RCC) Suspended matter 2000 mg/l