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MCQs

Total Questions : 112 | Page 10 of 12 pages
Question 91. In which form of solute stabilization, hydrogen sulfide in water is oxidized into sulfate?
  1.    Chlorination
  2.    Liming
  3.    Re-carbonation
  4.    Super-chlorination
 Discuss Question
Answer: Option A. -> Chlorination
Answer: (a).Chlorination
Question 92. By which process, odour producing substances is oxidized?
  1.    Chlorination
  2.    Liming
  3.    Re-carbonation
  4.    Super-chlorination
 Discuss Question
Answer: Option D. -> Super-chlorination
Answer: (d).Super-chlorination
Question 93. Solids are removed from the water by which of the following unit operation?
  1.    Inter facial contact
  2.    Solid stabilization
  3.    Ion transfer
  4.    Solids transfer
 Discuss Question
Answer: Option D. -> Solids transfer
Answer: (d).Solids transfer
Question 94. Which form of solute stabilization occurs when water passes through limestone?
  1.    Chlorination
  2.    Liming
  3.    Re-carbonation
  4.    Super-chlorination
 Discuss Question
Answer: Option B. -> Liming
Answer: (b).Liming
Question 95. In which process, excess lime is converted into bicarbonate?
  1.    Chlorination
  2.    Liming
  3.    Re-carbonation
  4.    Super-chlorination
 Discuss Question
Answer: Option C. -> Re-carbonation
Answer: (c).Re-carbonation
Question 96. Poor sanitation is an increasing problems of
  1.    South America and Africa
  2.    Middle East
  3.    Asia
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Answer: (d).All of these
Question 97. Hot and wet climate are the best condition to grow
  1.    Plants
  2.    Animals
  3.    Insects, Bacteria, viruses
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Answer: (d).All of these
Question 98. The head loss through screen depends on _______________
  1.    Shape of screen elements
  2.    Open area, block area
  3.    Approach velocity
  4.    Nature of their construction, approach velocity
 Discuss Question
Answer: Option D. -> Nature of their construction, approach velocity
Answer: (d).Nature of their construction, approach velocity
Question 99. The shape factor for circular rods in finding the head loss through the screen is _____
  1.    1.79
  2.    2.42
  3.    1.83
  4.    1.45
 Discuss Question
Answer: Option A. -> 1.79
Answer: (a).1.79
Question 100. The reduction of carbon dioxide by cascade aerators is in the range of __________
  1.    10-20%
  2.    20-30%
  3.    40-50%
  4.    50-60%
 Discuss Question
Answer: Option D. -> 50-60%
Answer: (d).50-60%

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