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Environmental Engineering - Interview Questions and Answers

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91. In chlorination, with the rise in temperature of water, death rate of bacteria
A. increases
B. decreases
C. remains unaffected
D. none of the above
Explanation:
92. The process in which the chlorination is done beyond the break point is known as
A. prechlorination
B. post chlorination
C. super chlorination
D. break point chlorination
Explanation:
93. Disinfection of water results in
A. removal of turbidity
B. removal of hardness
C. killing of disease bacteria
D. complete sterilisation
Explanation:
94. Chlorine demand of water is equal to
A. applied chlorine
B. residual chlorine
C. sum of applied and residual chlorine
D. difference of applied and residual chlorine
Explanation:
95. Which of the following chemical compounds can be used for dechlorination of water ?
A. carbon dioxide
B. bleaching powder
C. sulphur dioxide
D. chloramines
Explanation:
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