111. Which of the following causes a decrease in per capita consumption?
112. The process in which the chlorination is done beyond the break point is known as
113. Alum as a coagulant is found to be most effective when pH range of water is
114. Composting and lagooning are the methods of
115. Most of the bacteria in sewage are
116. The per capital consumption of a locality is affected by
(i) Climatic conditions
(ii) Quality of water
(iii) Distribution pressure
(i) Climatic conditions
(ii) Quality of water
(iii) Distribution pressure
117. Alkalinity in water is expressed as milligrams per litre in terms of equivalent
118. Which of the following unit works in anaerobic conditions?
119. Which of the following methods of analysis of water distribution system is most suitable for long and narrow pipe system?
120. The detention period in coagulation tanks is usually kept as
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