Water Supply Engineering

By boiling water, hardness can be removed if it is due to_____.

  • A. calcium sulphate
  • B. magnesium sulphate
  • C. calcium nitrate
  • D. calcium bicarbonate
Answer: Option D.
Explanation: 

IS 14665 gives details about elevators. It specifies the number, capacityof elevator and number of floors to be served.

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