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MCQs

Total Questions : 88 | Page 6 of 9 pages
Question 51. How many plates will be required in a lamella clarifier for the following data?
Flow: 40 m³/h
Area of plate: 1.2 m²
Rise rate: 1.2 m³/m²/h
  1.    27
  2.    25
  3.    29
  4.    30
 Discuss Question
Answer: Option C. -> 29
Answer: (c).29
Question 52. Calculate the flow per plate in a lamella clarifier for the following data?
Flow: 20 m³/h
Area of plate: 1.2 m²
Rise rate: 1.2 m³/m²/h
  1.    1.44 m³/h
  2.    1.55 m³/h
  3.    1.66 m³/h
  4.    1.04 m³/h
 Discuss Question
Answer: Option A. -> 1.44 m³/h
Answer: (a).1.44 m³/h
Question 53. What is the angle at which the plates should be inclined in a lamella clarifier?
  1.    70-80 degree
  2.    45-60 degree
  3.    20-35 degree
  4.    35-45 degree
 Discuss Question
Answer: Option B. -> 45-60 degree
Answer: (b).45-60 degree
Question 54. How many plates will be required in a lamella clarifier for the following data?
Flow: 120 m³/h
Area of plate: 1.8 m²
Rise rate: 0.9 m³/m²/h
  1.    75
  2.    80
  3.    85
  4.    90
 Discuss Question
Answer: Option A. -> 75
Answer: (a).75
Question 55. Calculate the Oil load for the following data.
Flow rate: 1000 m³/day
Oil present: 50 ppm
  1.    2.08 Kg/h
  2.    1.36 Kg/h
  3.    1.48 Kg/h
  4.    2.52 Kg/h
 Discuss Question
Answer: Option A. -> 2.08 Kg/h
Answer: (a).2.08 Kg/h
Question 56. What is the capacity of the oil skimmer used?
Flow: 90 m³/h
Oil present: 50 ppm
  1.    5 LPH
  2.    15 LPH
  3.    18 LPH
  4.    8 LPH
 Discuss Question
Answer: Option A. -> 5 LPH
Answer: (a).5 LPH
Question 57. What is the size of ionic particles present in wastewater?
  1.    < 0.1 micron
  2.    0.01 micron
  3.    0.001 micron
  4.    0.0001 micron
 Discuss Question
Answer: Option C. -> 0.001 micron
Answer: (c).0.001 micron
Question 58. The smallest particle size requiring removal from the fluid stream is called ______
  1.    Reduction
  2.    Filtration degree
  3.    Removal degree
  4.    Fluidization
 Discuss Question
Answer: Option B. -> Filtration degree
Answer: (b).Filtration degree
Question 59. The suspended particles sink to the bottom during the process.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 60. Which of the following is not a coagulant?
  1.    Ferric chloride
  2.    Aluminium sulphate
  3.    Aluminium phosphate
  4.    Sulphuric acid
 Discuss Question
Answer: Option D. -> Sulphuric acid
Answer: (d).Sulphuric acid

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