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MCQs

Total Questions : 74 | Page 7 of 8 pages
Question 61. What is the percentage of Carbon dioxide produced during anaerobic digestion?
  1.    70-80%
  2.    80-90%
  3.    30-50%
  4.    50-60%
 Discuss Question
Answer: Option C. -> 30-50%
Answer: (c).30-50%
Question 62. What is the volumetric organic loading in Kg COD/ m³ day for a completely mixed anaerobic digestion process?
  1.    1-5
  2.    5-7
  3.    7-9
  4.    9-12
 Discuss Question
Answer: Option A. -> 1-5
Answer: (a).1-5
Question 63. What is the rate limiting step in anaerobic digestion?
  1.    Methanogenesis
  2.    Hydrolysis
  3.    Acidification
  4.    Biogas production
 Discuss Question
Answer: Option A. -> Methanogenesis
Answer: (a).Methanogenesis
Question 64. For what range of COD level anaerobic digestion is carried out?
  1.    400-800
  2.    900-1200
  3.    1500-2000
  4.    300-400
 Discuss Question
Answer: Option C. -> 1500-2000
Answer: (c).1500-2000
Question 65. What is the percentage of thickness that the sludge should have to undergo additional treatment?
  1.    Greater than 10
  2.    Less than 10
  3.    Equal to 10
  4.    0.1
 Discuss Question
Answer: Option B. -> Less than 10
Answer: (b).Less than 10
Question 66. Out of the following methods which provide uniform dewatering?
  1.    Belt filter press
  2.    Filter press
  3.    Sludge bed
  4.    Centrifuge
 Discuss Question
Answer: Option A. -> Belt filter press
Answer: (a).Belt filter press
Question 67. The cyclone gritter removes the grit particles based on which of the below mentioned phenomenon?
  1.    Centrifugal force
  2.    Gravity
  3.    Brownian motion
  4.    Sedimentation
 Discuss Question
Answer: Option A. -> Centrifugal force
Answer: (a).Centrifugal force
Question 68. The usage of which type of pump results in less wear and tear while pumping the sludge?
  1.    Vertical turbine pumps
  2.    Submersible pump
  3.    Progressive cavity pump
  4.    Non-clog pump
 Discuss Question
Answer: Option C. -> Progressive cavity pump
Answer: (c).Progressive cavity pump
Question 69. Primary sludge constitutes which of the following?
  1.    Chemical sludge
  2.    Settlable solids
  3.    Biological solids
  4.    Biological and settlable solids
 Discuss Question
Answer: Option B. -> Settlable solids
Answer: (b).Settlable solids
Question 70. What is the thickened concentration of the primary sludge?
  1.    1-2%
  2.    2-3%
  3.    3-5%
  4.    5-10%
 Discuss Question
Answer: Option D. -> 5-10%
Answer: (d).5-10%

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