Question 21 : The sewage comes in the Imhoff tank through which of the following?
1. A
2. B
3. C
4. D
View Answer   Discuss with Members

Question 22 : The detention period of oxidation pond is
1. 12-36 hours
2. 4 hours
3. 10-20 days
4. 30-60 seconds
View Answer   Discuss with Members

Question 23 : In which method of disposal of municipal solid waste, the waste is dumped in the soil?
1. Incineration
2. Composting
3. Land filing
4. Shredding
View Answer   Discuss with Members

Question 24 : The disposal of sewage from the septic tank is done by which of the following?
1. Clarifier
2. Soak pit
3. Aerated lagoon
4. Lamp holes
View Answer   Discuss with Members

Question 25 : What is the type of filter used in septic tank when the rate of percolation is 90 minutes?
1. Slow sand filter
2. Rapid sand filter
3. Biological filter
4. Trickling filter
View Answer   Discuss with Members

Question 26 : State whether the following statement is true or false.
Oxidation pond is ineffective in removing pathogenic bacteria.
1. True
2. False
3.
4.
View Answer   Discuss with Members

Question 27 : Which of the following is represented by C?
1. Outlet
2. Digestion chamber
3. Gas chamber
4. Sedimentation chamber
View Answer   Discuss with Members

Question 28 : In which of the following, the settling of solids takes place?
1. Outlet
2. Digestion chamber
3. Gas chamber
4. Sedimentation chamber
View Answer   Discuss with Members

Question 29 : The minimum design depth of oxidation pond is
1. 0.3m
2. 0.5m
3. 1m
4. 1.5m
View Answer   Discuss with Members

Question 30 : The process of decomposition of biodegradable solid waste by earthworms is called
1. Land fills
2. Shredding
3. Vermi-composting
4. Composting
View Answer   Discuss with Members