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MCQs

Total Questions : 112 | Page 8 of 12 pages
Question 71. In which unit operation, gases are released or absorbed in the water?
  1.    Gas transfer
  2.    Ion transfer
  3.    Solute stabilization
  4.    Solids Transfer
 Discuss Question
Answer: Option A. -> Gas transfer
Answer: (a).Gas transfer
Question 72. Which of the following process is used to remove the colloidal particles from water?
  1.    Chemical precipitation
  2.    Chemical coagulation
  3.    Ion exchange
  4.    Adsorption
 Discuss Question
Answer: Option B. -> Chemical coagulation
Answer: (b).Chemical coagulation
Question 73. How many types of aerators are commonly used in the treatment of water?
  1.    2
  2.    3
  3.    4
  4.    5
 Discuss Question
Answer: Option C. -> 4
Answer: (c).4
Question 74. Flocculation of iron from water by the addition of lime is an example of which of the following process?
  1.    Chemical precipitation
  2.    Chemical coagulation
  3.    Ion exchange
  4.    Adsorption
 Discuss Question
Answer: Option A. -> Chemical precipitation
Answer: (a).Chemical precipitation
Question 75. In which unit operation objectionable solutes are converted into unobjectionable forms without removal?
  1.    Gas transfer
  2.    Ion transfer
  3.    Solute stabilization
  4.    Solids Transfer
 Discuss Question
Answer: Option C. -> Solute stabilization
Answer: (c).Solute stabilization
Question 76. The color of the artificial zeolite permutit is ____________
  1.    Grey
  2.    Yellow
  3.    Green
  4.    White
 Discuss Question
Answer: Option D. -> White
Answer: (d).White
Question 77. The color of the natural zeolite is ____________
  1.    Green
  2.    Grey
  3.    Black
  4.    Blue
 Discuss Question
Answer: Option A. -> Green
Answer: (a).Green
Question 78. Natural zeolite is mainly processed from ____________
  1.    White sand
  2.    Green sand
  3.    Grey sand
  4.    Red sand
 Discuss Question
Answer: Option B. -> Green sand
Answer: (b).Green sand
Question 79. Permutit has an exchange value of ________ grams of hardness per m³ of zeolite.
  1.    10,000
  2.    20,000-30,000
  3.    35,000-40,000
  4.    40,000-50,000
 Discuss Question
Answer: Option C. -> 35,000-40,000
Answer: (c).35,000-40,000
Question 80. The chemical formula of Permutit is ____________
  1.    SiOAl₂O₃Na₂O
  2.    SiO₂Al₂O₃Na₂O
  3.    SiO₂Al₂O₃NaO
  4.    SiO₃Al₂O₃Na₂O
 Discuss Question
Answer: Option B. -> SiO₂Al₂O₃Na₂O
Answer: (b).SiO₂Al₂O₃Na₂O

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