engineering recuitment GATE CE 2023-24 Test Series Environmental Engineering Water Treatment Disinfection
Results of chlorine demand test on a raw water are tabulated below
|
Sample No. |
Chlorine Dosage (mg/L) |
Residual Chlorine after 10 min Contact (mg/L) |
|
1 |
0.2 |
0.19 |
|
2 |
0.4 |
0.36 |
|
3 |
0.6 |
0.50 |
|
4 |
0.8 |
0.48 |
|
5 |
1.0 |
0.20 |
|
6 |
1.2 |
0.40 |
|
7 |
1.4 |
0.60 |
|
8 |
1.6 |
0.80 |
Which of the following is/are true?
1
Break point Dosage is 1.0 mg/L
2
Chlorine demand at dosage of 1.2 mg/L is 0.8 mg/L
3
Break point Dosage is 1.2 mg/L
4
Chlorine demand at dosage of 1.4 mg/L is 0.8 mg/L