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MCQs

Total Questions : 129 | Page 11 of 13 pages
Question 101. The fishes were present in the river, but algaes were not able to survive. What is the zone of pollution of the river?
  1.    Zone of recovery
  2.    Zone of degradation
  3.    Zone of clean water
  4.    Zone of active decomposition
 Discuss Question
Answer: Option B. -> Zone of degradation
Answer: (b).Zone of degradation
Question 102. The reoxygenation constant at temperature ‘T’ is expressed by ___________
  1.    KRT = Kʀ₂₀ (1.016)ᵀ
  2.    KRT = Kʀ₂₀ (1.047)ᵀ⁻²⁰
  3.    KRT = Kʀ₂₀ (1.016)ᵀ⁻²⁰
  4.    KRT = Kʀ₂₀ (1.047)ᵀ
 Discuss Question
Answer: Option C. -> KRT = Kʀ₂₀ (1.016)ᵀ⁻²⁰
Answer: (c).KRT = Kʀ₂₀ (1.016)ᵀ⁻²⁰
Question 103. In which pollution zone of the river, the concentration of D.O reduced to 40%?
  1.    Zone of degradation
  2.    Zone of recovery
  3.    Zone of active decomposition
  4.    Zone of clean water
 Discuss Question
Answer: Option C. -> Zone of active decomposition
Answer: (c).Zone of active decomposition
Question 104. In which pollution zone of the river, water retains its original dissolved oxygen concentration?
  1.    Zone of degradation
  2.    Zone of recovery
  3.    Zone of active decomposition
  4.    Zone of clean water
 Discuss Question
Answer: Option D. -> Zone of clean water
Answer: (d).Zone of clean water
Question 105. The depth of Euphotic zone is measured by ____________
  1.    Calorimeter
  2.    Turbidity meter
  3.    Secchi disk
  4.    Radar
 Discuss Question
Answer: Option C. -> Secchi disk
Answer: (c).Secchi disk
Question 106. By which process, odor producing substances are oxidized?
  1.    Chlorination
  2.    Liming
  3.    Re-carbonation
  4.    Super-chlorination
 Discuss Question
Answer: Option D. -> Super-chlorination
Answer: (d).Super-chlorination
Question 107. Organic contaminants are removed from the wastewater by ____________
  1.    Water softening
  2.    Demineralization
  3.    Absorption
  4.    Adsorption
 Discuss Question
Answer: Option D. -> Adsorption
Answer: (d).Adsorption
Question 108. Which of the following process is used to remove the colloidal particles from the effluent?
  1.    Chemical precipitation
  2.    Chemical coagulation
  3.    Ion exchange
  4.    Adsorption
 Discuss Question
Answer: Option B. -> Chemical coagulation
Answer: (b).Chemical coagulation
Question 109. How many types of aerators are commonly used in the treatment of wastewater?
  1.    2
  2.    3
  3.    4
  4.    5
 Discuss Question
Answer: Option C. -> 4
Answer: (c).4
Question 110. In which form of solute stabilization, hydrogen sulfide in the effluent is oxidized into sulfate?
  1.    Chlorination
  2.    Liming
  3.    Re-carbonation
  4.    Super-chlorination
 Discuss Question
Answer: Option A. -> Chlorination
Answer: (a).Chlorination

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