This set of Poultry Products Processing Multiple Choice Questions & Answers (MCQs) focuses on “Processing Water and Wastewater in Poultry Plant”.
1. Which of the following mechanism is used in activated sludge process?
a) Anaerobic suspended growth
b) Anaerobic attached growth
c) Aerobic suspended growth
d) Facultative suspended growth
View Answer
Explanation: Aerobic suspended growth mechanism is used in activated sludge process. This process is used in both domestic and industrial waste water. It uses highly concentrated microbes to degrade the organic compounds.
2. Which of the following mechanism is used in trickling filter process?
a) Anaerobic suspended growth
b) Anaerobic attached growth
c) Aerobic attached growth
d) Facultative suspended growth
View Answer
Explanation: Aerobic attached growth mechanism is used in trickling filter process. This is a combination of filtration, adsorption and removal of contaminates from the waste water. The unprocessed water is allowed to flow in a thin film over the biological media.
3. Which of the following mechanism is used in rotating biological contactor process?
a) Anaerobic suspended growth
b) Anaerobic attached growth
c) Aerobic attached growth
d) Facultative suspended growth
View Answer
Explanation: Aerobic attached growth mechanism is used in rotating biological contactor process. It is a biological fixed film process. It is used in the secondary treatment of waste water. The disks gradually rotate with 40% of surface area submerged in the wastewater.
4. Which of the following mechanism is used in oxidation pond?
a) Anaerobic suspended growth
b) Anaerobic attached growth
c) Aerobic suspended growth
d) Facultative suspended growth
View Answer
Explanation: Aerobic suspended growth mechanism is used in oxidation ponds. These are large and shallow ponds. It treats the waste water by sunlight and algae. The algae play an important role in maintaining the oxidation ponds.
5. What is the other name for oxidation ponds?
a) Stabilization ponds
b) Biological ponds
c) Algae ponds
d) Oxygen release ponds
View Answer
Explanation: Oxidation ponds are also called as lagoons ponds and stabilization ponds. It reduces the organic content in the waste water and helps in the removal of pathogens. They are generally man-made depressions.
6. Which of the following mechanism is used in sceptic tank?
a) Anaerobic suspended growth
b) Anaerobic attached growth
c) Aerobic suspended growth
d) Facultative suspended growth
View Answer
Explanation: Anaerobic suspended growth mechanism is used in sceptic tanks. It is normally constructed within the premises of poultry industries. It is an underground tank made of concrete. The sewage water is processed for basic treatment and is released in drainage.
7. Which of the following mechanism is used in imhoff tank?
a) Anaerobic suspended growth
b) Anaerobic attached growth
c) Aerobic suspended growth
d) Facultative suspended growth
View Answer
Explanation: Anaerobic suspended growth mechanism is used in Imhoff tanks. It is used as a primary treatment for unprocessed water. It is designed to remove solid -liquids. It contains gas vents above the chamber.
8. BOD test is based on dissolved oxygen.
a) True
b) False
View Answer
Explanation: BOD (Biochemical oxygen demand) is based on dissolved oxygen. It is defined as the amount of dissolved oxygen desirable for the aerobic microbes to break down the organic material present in a given water.
9. Biogas and sludge are end products of waste water treatment?
a) True
b) False
View Answer
Explanation: Biogas is produced due to the microbial degradation of the waste treated. It is used in cooking especially in villages. Whereas the sludge is the end product obtained after both primary and secondary treatment. It is very toxic and is disposed carefully.
10. What is winkler’s method?
a) It determines the BOD of the waste water
b) It determines the COD of the waste water
c) It determines the dissolved oxygen of the waste water
d) It determines the methane of the waste water
View Answer
Explanation: The Winkler Method is a method used to measure dissolved oxygen in water. Dissolved oxygen is used as an indicator of the health of a water body. The water is checked for dissolved oxygen before letting into the fresh water ponds and lakes.
11. A waste water treatment plant has a flow rate of 0.8m3/s. The settling tank has a dimensions of length 20m, depth 3m and width 8m. The settling velocity is 0.003m/s. What is the percentage of waste particles are removed from the tank?
a) 60%
b) 70%
c) 80%
d) 100%
View Answer
Explanation:
Settling velocity of a concerned size particle is called as surface overflow rate (SOR)
SOR= Discharge/ Surface area
SOR= 0.8/ (20×8)
SOR= 0.005m/s
All the particles whose settling velocity is greater than or equal to SOR will settle 100% while particles with settling velocity less than SOR will settle partially.
Therefore, Settling velocity < SOR,
% removal= (settling velocity x 100) /SOR
% removal = (0.003×100) /0.005
% removal = 60%
12. A waste water treatment plant has a flow rate of 0.2m3/s. The settling tank has a dimensions of length 10m, depth 3m and width 2m. The settling velocity is 0.03m/s. What is the percentage of waste particles are removed from the tank?
a) 60%
b) 70%
c) 80%
d) 100%
View Answer
Explanation:
Settling velocity of a concerned size particle is called as surface overflow rate (SOR)
SOR= Discharge/ Surface area
SOR= 0.2/ (10×2)
SOR= 0.01m/s
All the particles whose settling velocity is greater than or equal to SOR will settle 100% while particles with settling velocity less than SOR will settle partially.
Therefore, settling velocity > SOR, the particles settle 100%.
13. A waste water treatment plant has a flow rate of 0.5m3/s. The settling tank has a dimensions of length 20m, depth 3m and width 5m. What is the settling velocity if the percentage of the particles removed is 70%?
a) 0.0035m/s
b) 0.0025m/s
c) 0.003m/s
d) 0.002m/s
View Answer
Explanation:
Settling velocity of a concerned size particle is called as surface overflow rate (SOR)
SOR= Discharge/ Surface area
SOR= 0.5/ (20×5)
SOR= 0.005m/s
All the particles whose settling velocity is greater than or equal to SOR will settle 100% while particles with settling velocity less than SOR will settle partially.
% removal= (settling velocity x 100) /SOR
Settling velocity = (% removal x SOR)/100
Settling velocity = (70 x 0.005)/100
Settling velocity= 0.0035m/s
14. What is the surface flow rate of the waste water treatment plant which has a flow rate of 0.9m3/s. The settling tank has a dimensions of length 30m, depth 2m and width 4m.
a) 0.0075m/s
b) 0.0065m/s
c) 0.009m/s
d) 0.006m/s
View Answer
Explanation:
Settling velocity of a concerned size particle is called as surface overflow rate (SOR)
SOR= Discharge/ Surface area
SOR= 0.9/ (30×4)
SOR= 0.0075m/s
15. What is the flow rate of the waste water treatment plant which has a surface flow rate of 0.0064m/s. The settling tank has a dimensions of length 40m, depth 2m and width 5m.
a) 1.28 m3/s
b) 0.28 m3/s
c) 2.28 m3/s
d) 1.8 m3/s
View Answer
Explanation:
Settling velocity of a concerned size particle is called as surface overflow rate (SOR)
SOR= Discharge/ Surface area
Discharge= SOR x Surface area
Discharge= 0.0064 x 40 x 5
Discharge= 1.28 m3/s
Sanfoundry Global Education & Learning Series – Poultry Products Processing.
To practice all areas of Poultry Products Processing, here is complete set of Multiple Choice Questions and Answers.
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