Pick up the correct statement from the following:
A. Water with hardness up to 75 ppm is considered soft
B. Water with hardness more than 200 ppm is considered hard
C. Water needed for laundries should contain hardness less than 75 ppm
D. All the above
Answer: Option D
Related Questions on Water Supply Engineering
The fire demand of a city may be worked out by
A. Kuichling’s formula
B. Freeman formula
C. Bustan’s formula
D. All the above
Mathamoglobinemia or blue baby disease is caused due to
A. Chlorides
B. Nitrites
C. Nitrates
D. Sulphides
Acidity in water is caused due to
A. Mineral acids
B. Free CO2
C. Aluminium sulphate
D. All the above
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