engineering recuitment OSSC Combined Technical Services (ଓଡିଶା) Mock Test 2023-24 Environmental Engineering Water Treatment Disinfection
Consider the following statements.
Some amount of chlorine is allowed in drinking water because
A. It helps in killing, bacteria
B. Small quantity of chlorides adds to the taste
C. It is not injurious to human health
D. It is not economical to remove it completely
Which of these statements are correct?
1
Only A, B and D
2
Only A, B and C
3
Only B, C and D
4
Only A, C and D