Civil Engineering :: Environmental Engineering - Civil Engineering
- The velocity of flow does not depend on
- The slope of sewer shall be
- The overflow rate for plain sedimentation tanks is about
- The main disadvantage of cement concrete sewers is
- Which of the following compounds is widely used for algae control?
- Select the correct statement.
- The devices which are installed for drawing water from the sources are called
- The treatment of water with bleaching powder is known as
- As compared to higher pH values, the contact period required for efficient chlorination at lower pH values is
-
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
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