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Aptitude
General Knowledge
Verbal Reasoning
Computer Science
Interview
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Water Supply Engineering
Pick up the correct statement from the following :
Water with hardness upto 75 ppm is considered soft
Water with hardness more than 200 ppm is considered hard
Water needed for laundaries should contain hardness less than 75 ppm
To provide taste during drinking, water should possess hardness between 75 to 120
All the above.
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Correct Answer:
All the above.
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