Civil Engineering MCQAE Level Civil Engineering
Zero hardness of water is achieved by
Environmental EngineeringEnvironmental EngineeringMEDIUM
Choose the correct answer
A
Lime-soda process
B
Excess-lime process
C
Ion exchange treatment
D
Excess lime and alum treatment
Correct Answer
C. Ion exchange treatment
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Ion-exchange (resin/zeolite) treatment can reduce hardness to virtually zero; lime-soda leaves residual hardness.
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This MCQ belongs to WBPSC AE Previous Years Questions Series. Full tests include timed attempts, rank comparison and subject-wise analysis.