Question 11 : The waste produced in cotton mills are
1. Municipal solid waste
2. Non biodegradable waste
3. Hazardous waste
4. Non hazardous waste
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Question 12 : Which of the following is called as scum chamber?
1. Settling chamber
2. Sedimentation chamber
3. Gas chamber
4. Digestion chamber
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Question 13 : Which of the following is not the municipal solid waste?
1. Radioactive substance
2. Ashes
3. Food waste
4. Rubbish
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Question 14 : The maximum BOD removal efficiency of an oxidation pond is
1. 90%
2. 68%
3. 70%
4. 80%
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Question 15 : In which method of composting, decomposition of anaerobic waste takes place?
1. Indian method
2. Depression method
3. Bangalore method
4. Trench method
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Question 16 : The minimum depth of septic tank as per design consideration is
1. 1.8m
2. 1m
3. 1.2m
4. 1.5m
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Question 17 : Which of the following is correct regarding disposal of waste by land filling?
1. Economical method
2. Preferred in low lying areas
3. Foul gases are not produced
4. Separation of different types of waste not required
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Question 18 : Which of the following waste can be decomposed by bacteria?
1. Radioactive substance
2. Ashes
3. Food waste
4. Rubbish
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Question 19 : The sludge is digested in which of the following?
1. Outlet
2. Sedimentation chamber
3. Gas chamber
4. Digestion chamber
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Question 20 : B in the above figure is represented by
1. Outlet
2. Sedimentation chamber
3. Gas chamber
4. Digestion chamber
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