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MCQs

Total Questions : 476 | Page 4 of 48 pages
Question 31. Macromolecules deposited uniformly on pore walls is called ______
  1.    Standard blocking
  2.    Complete blocking
  3.    Intermediate blocking
  4.    Blocking
 Discuss Question
Answer: Option A. -> Standard blocking
Answer: (a).Standard blocking
Question 32. Micro-organisms adhering to the membrane surface forming a gel layer is called ______
  1.    Scaling
  2.    Biofilm
  3.    Gel layer
  4.    Barrier
 Discuss Question
Answer: Option B. -> Biofilm
Answer: (b).Biofilm
Question 33. Which of the following factors does not stimulate scale formation?
  1.    pH
  2.    Temperature
  3.    Area
  4.    Flow velocity
 Discuss Question
Answer: Option C. -> Area
Answer: (c).Area
Question 34. Which of the following is not correct with respect to ultrafiltration?
  1.    Chemicals required
  2.    Compact plant size
  3.    Good product quality
  4.    Good pathogen removal
 Discuss Question
Answer: Option A. -> Chemicals required
Answer: (a).Chemicals required
Question 35. What is the turbidity for hollow fibers?
  1.    <15
  2.    <1
  3.    <10
  4.    <12
 Discuss Question
Answer: Option A. -> <15
Answer: (a).<15
Question 36. The maximum removal of nitrogen from septic tanks is 15%.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 37. What is the retention time considered for the anaerobic zone for the AO process for removing phosphorus?
  1.    1-3 hrs
  2.    3-5 hrs
  3.    5-8 hrs
  4.    8-11 hrs
 Discuss Question
Answer: Option A. -> 1-3 hrs
Answer: (a).1-3 hrs
Question 38. What is the SDNR assumed while designing postanoxic tank?
  1.    0.1-0.4
  2.    1.5-2
  3.    0.8-1
  4.    3-4
 Discuss Question
Answer: Option A. -> 0.1-0.4
Answer: (a).0.1-0.4
Question 39. What is the power consumed for the anoxic process for the removal of nitrogen?
  1.    0.5-1.5 hrs
  2.    1.5-2 hrs
  3.    2-4 hrs
  4.    4-8 hrs
 Discuss Question
Answer: Option A. -> 0.5-1.5 hrs
Answer: (a).0.5-1.5 hrs
Question 40. What is the percentage of nitrogen removal that can be obtained from facultative lagoons?
  1.    50%
  2.    65%
  3.    85%
  4.    95%
 Discuss Question
Answer: Option D. -> 95%
Answer: (d).95%

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