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MCQs

Total Questions : 86 | Page 3 of 9 pages
Question 21. Efficient wastewater treatment is done by segregating various waste streams and treating them separately.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 22. Which of the following is another name given to conventional bio filters?
  1.    Percolating filter
  2.    Filter cake
  3.    Injection recovery
  4.    Bio-luminescence
 Discuss Question
Answer: Option A. -> Percolating filter
Answer: (a).Percolating filter
Question 23. In the exposed lands, ______ are used to assist rotation during harsh weather conditions?
  1.    Wind vanes
  2.    Water sprayer
  3.    Flow bed
  4.    Motor drives
 Discuss Question
Answer: Option A. -> Wind vanes
Answer: (a).Wind vanes
Question 24. Reverse osmosis is used in the treatment of waste water to remove the suspended solids from the water.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 25. Secondary treatment systems can be used for biological degradation of ____________ in municipal waste waters.
  1.    Carbon dioxide and methane
  2.    Nitrogen and CO₂
  3.    CO and methane
  4.    Organic pollutants
 Discuss Question
Answer: Option D. -> Organic pollutants
Answer: (d).Organic pollutants
Question 26. Bio filters are fed with effluent only after ____________
  1.    Initial settlement
  2.    Bio-accumulation
  3.    Bio-degradation
  4.    Bio-magnification
 Discuss Question
Answer: Option A. -> Initial settlement
Answer: (a).Initial settlement
Question 27. Compensation for lower temperatures can be achieved by reducing hydraulic and organic loading rates thereby increasing _____________
  1.    Retention time
  2.    Mixing
  3.    Aeration
  4.    Sparging
 Discuss Question
Answer: Option A. -> Retention time
Answer: (a).Retention time
Question 28. Effective preliminary treatment can also be used to remove the ____
  1.    Girt and rag
  2.    Carbon dioxide
  3.    Nutrients
  4.    Oxygen
 Discuss Question
Answer: Option A. -> Girt and rag
Answer: (a).Girt and rag
Question 29. Which of the following has the potential to ‘rough’ high strength industrial effluents prior to sewage discharge?
  1.    High rate bio filters
  2.    Conventional bio filters
  3.    Percolating filters
  4.    Rotating biological contractors
 Discuss Question
Answer: Option A. -> High rate bio filters
Answer: (a).High rate bio filters
Question 30. Which of the following factors doesn’t influence biological treatment efficiency?
  1.    Surface area
  2.    Void space
  3.    Drainage
  4.    High BOD
 Discuss Question
Answer: Option D. -> High BOD
Answer: (d).High BOD

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