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Q: The total solids in water are due to presence of
  • A. Colloidal and settleable solids
  • B. Suspended and floating solids
  • C. Suspended and dissolved solids
  • D. Colloidal and bacterial load
Correct Answer: Option C - Total solids are dissolved solids plus suspended and settleable solids in water. In stream water, dissolved solids consist of calcium, chlorides, nitrate, phosphorus, iron, sulphur, and other ions particles that will pass through a filter with pores of around 2 microns (0.002 cm) in size.
C. Total solids are dissolved solids plus suspended and settleable solids in water. In stream water, dissolved solids consist of calcium, chlorides, nitrate, phosphorus, iron, sulphur, and other ions particles that will pass through a filter with pores of around 2 microns (0.002 cm) in size.

Explanations:

Total solids are dissolved solids plus suspended and settleable solids in water. In stream water, dissolved solids consist of calcium, chlorides, nitrate, phosphorus, iron, sulphur, and other ions particles that will pass through a filter with pores of around 2 microns (0.002 cm) in size.