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MCQs

Total Questions : 90 | Page 7 of 9 pages
Question 61. Which of the following process is not involved in the treatment of sludge?
  1.    Dewatering
  2.    Drying
  3.    Flocculation
  4.    Conditioning
 Discuss Question
Answer: Option C. -> Flocculation
Answer: (c).Flocculation
Question 62. Which of the following is the final stage in the sludge treatment process?
  1.    Digestion
  2.    Dewatering
  3.    Drying
  4.    Thickening
 Discuss Question
Answer: Option C. -> Drying
Answer: (c).Drying
Question 63. In which sludge treatment process, the organic solids are converted into more stable form?
  1.    Dewatering
  2.    Thickening
  3.    Digestion
  4.    Conditioning
 Discuss Question
Answer: Option C. -> Digestion
Answer: (c).Digestion
Question 64. The process of removal of water from the sludge is called ______
  1.    Dewatering
  2.    Thickening
  3.    Digestion
  4.    Drying
 Discuss Question
Answer: Option A. -> Dewatering
Answer: (a).Dewatering
Question 65. The sludge treatment process to increase the solid content of sludge is ___________
  1.    Dewatering
  2.    Thickening
  3.    Conditioning
  4.    Drying
 Discuss Question
Answer: Option B. -> Thickening
Answer: (b).Thickening
Question 66. Which of the following is obtained in the secondary tank in two stage sludge digester?
  1.    Partially digested sludge
  2.    Partially digested sludge and supernatant liquor
  3.    Digested sludge and supernatant liquor
  4.    supernatant liquor
 Discuss Question
Answer: Option C. -> Digested sludge and supernatant liquor
Answer: (c).Digested sludge and supernatant liquor
Question 67. The high rate sludge digestion tanks are used when the capacity of the tank is ____ million liters per day.
  1.    1
  2.    3
  3.    4
  4.    10
 Discuss Question
Answer: Option C. -> 4
Answer: (c).4
Question 68. In which of the following, both primary and secondary tanks are used?
  1.    Two stage sludge digesters
  2.    Single stage sludge digesters
  3.    Low rate digesters
  4.    High rate digesters
 Discuss Question
Answer: Option A. -> Two stage sludge digesters
Answer: (a).Two stage sludge digesters
Question 69. The minimum size of sludge digestion tank is ___________
  1.    0.5m
  2.    1m
  3.    2m
  4.    3m
 Discuss Question
Answer: Option D. -> 3m
Answer: (d).3m
Question 70. The range of temperature at which mesophilic microorganism becomes active in sludge digester is ___________
  1.    30-40°C
  2.    10-40°C
  3.    20-50°C
  4.    20-40°C
 Discuss Question
Answer: Option D. -> 20-40°C
Answer: (d).20-40°C

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