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MCQs

Total Questions : 135 | Page 4 of 14 pages
Question 31. While designing a blower for backwash for multimedia filters with air scouring what is the velocity considered?
  1.    36 m/h
  2.    30 m/h
  3.    24 m/h
  4.    20 m/h
 Discuss Question
Answer: Option D. -> 20 m/h
Answer: (d).20 m/h
Question 32. Calculate the flow rate of the backwash pump to be used for a dual media filter with the following data.
Flowrate: 2200 m³/h
Rise velocity of DMF: 15 m/h
  1.    4500 m³/ h
  2.    3520 m³/ h
  3.    3750 m³/ h
  4.    4920 m³/ h
 Discuss Question
Answer: Option B. -> 3520 m³/ h
Answer: (b).3520 m³/ h
Question 33. While designing a pump for backwash for a filter what will be the velocity assumed?
  1.    24 m/h
  2.    36 m/h
  3.    30 m/h
  4.    20 m/h
 Discuss Question
Answer: Option A. -> 24 m/h
Answer: (a).24 m/h
Question 34. Calculate the flow rate of the backwash pump to be used for a pressure sand filter with the following data.
Flowrate: 2200 m³/h
Rise velocity of PSF (Pressure Sand filter): 10 m/h
  1.    4500 m³/ h
  2.    5280 m³/ h
  3.    6480 m³/ h
  4.    7580 m³/ h
 Discuss Question
Answer: Option B. -> 5280 m³/ h
Answer: (b).5280 m³/ h
Question 35. Calculate the flow rate of the backwash pump to be used for a multimedia filter with the following data.
Flowrate: 2200 m³/h
Rise velocity of multimedia filter: 18 m/h
  1.    3700 m³/ h
  2.    2900 m³/ h
  3.    5300 m³/ h
  4.    3800 m³/ h
 Discuss Question
Answer: Option B. -> 2900 m³/ h
Answer: (b).2900 m³/ h
Question 36. Which of the following causes thickening of the biofilm?
  1.    Reduction of intake wastewater
  2.    Rapid growth of organisms
  3.    Reduction in air supply
  4.    Increase in acidity
 Discuss Question
Answer: Option B. -> Rapid growth of organisms
Answer: (b).Rapid growth of organisms
Question 37. What is the depth of the trickling filter?
  1.    0.5-1 m
  2.    1-1.5 m
  3.    1.5-2 m
  4.    2-3 m
 Discuss Question
Answer: Option D. -> 2-3 m
Answer: (d).2-3 m
Question 38. The spindle is provided at the ______ to support perforated plates.
  1.    Edge
  2.    Bottom
  3.    Top
  4.    Centre
 Discuss Question
Answer: Option D. -> Centre
Answer: (d).Centre
Question 39. While designing a trickling filter what would be the depth assumed?
  1.    12-15m
  2.    4-12 m
  3.    16-20 m
  4.    20-25 m
 Discuss Question
Answer: Option B. -> 4-12 m
Answer: (b).4-12 m
Question 40. What is the shape of a typical trickling filter?
  1.    Circular
  2.    Cylindrical
  3.    Square
  4.    Rectangular
 Discuss Question
Answer: Option A. -> Circular
Answer: (a).Circular

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