101. The velocity of flow does not depend on
102. The slope of sewer shall be
103. The overflow rate for plain sedimentation tanks is about
104. The main disadvantage of cement concrete sewers is
105. Which of the following compounds is widely used for algae control?
106. Select the correct statement.
107. The devices which are installed for drawing water from the sources are called
108. The treatment of water with bleaching powder is known as
109. As compared to higher pH values, the contact period required for efficient chlorination at lower pH values is
110. The disinfection efficiency of chlorine increases by
(i) Decreasing the time of contact
(ii) Decreasing the temperature of water
(iii) Increasing the temperature of water
(i) Decreasing the time of contact
(ii) Decreasing the temperature of water
(iii) Increasing the temperature of water
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