STUPIDSID
1 (1)
Explain the importance of environmental sanitation.
4 M
1 (2)
Explain food chain and food web in relation to ecology.
4 M
1 (3)
Explain the principle of sedimentation.
4 M
1 (4)
Define potable water and state different types of pollution.
4 M
1 (5)
State the significance of residual chlorine in drinking water. Explain the test performed in the laboratory for determining residual chlorine.
4 M
2 (1)
A rectangular tank with length of 15 m, width of 6 m and depth 3 m into treat 2.40 × 106 MLD. Calculate (1) Detention period of tank (2) Average flow velocity through tank (3) S.O.R.
10 M
2 (2)
Briefly explain the different types of disinfectants used in water treatment stating the relative merits and situation where they are most suited.
10 M
3 (1)
Draw the flow sheet showing sequence of various treatment units of a typical water treatment units of a typical water treatment plant with perennial river as the source of water. List these treatment units sequentially and state the function of each unit.
10 M
3 (2)
Design a rapid sand filter to treat 2.25 MLD water supply for town. Given (i) filter works for 12 hours a day (ii) rate of filtration is 1250 MI/d/ha.
10 M
4 (1)
Describe the operating problems of Rapid sand filter. Explain Negative head.
10 M
4 (2)
How are impurities in water classified? What are their respective causes and their effects?
10 M
5 (1)
Explain various methods to control leachate.
10 M
5 (2)
Explain why chlorination is considered necessary even when filtration provided. Explain break point chlorination with diagram.
10 M
6 (1)
Why are coagulants required in water treatment? What factors affect the dosage of coagulant?
10 M
6 (2)
Define soft water. Write down the different methods of water softening. Explain a method of softening of water for industrial use.
10 M
Write any short notes on any four of the following
7 (1)
Composting
5 M
7 (2)
Hazardous waste.
5 M
7 (3)
Iron and Manganese removal.
5 M
7 (4)
Biochemical cyties.
5 M
7 (5)
Fluoridation and de fluoridation.
5 M
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