engineering recuitment PGCIL Diploma Trainee Mock Test 2024 Environmental Engineering Water Treatment Disinfection
The chlorine demand of a water sample was found to be 0.2 mg/litre. The amount of bleaching powder containing 30% available chlorine to be added to treat one litre of such a water sample is
1
0.06 mg
2
0.14 mg
3
1.33 mg
4
0.67 mg