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MCQs

Total Questions : 181 | Page 8 of 19 pages
Question 71. The cracking of bed is more prominent __________
  1.    Near the wall junction
  2.    Outside the wall junction
  3.    Inside the wall junction
  4.    On the wall junction
 Discuss Question
Answer: Option A. -> Near the wall junction
Answer: (a).Near the wall junction
Question 72. ______ are formed in filters due to insufficient washing of sand grains.
  1.    Sand boils
  2.    Mud balls
  3.    Clogging
  4.    Bubbles
 Discuss Question
Answer: Option B. -> Mud balls
Answer: (b).Mud balls
Question 73. When the loss of the head exceeds the static head, the head becomes _____
  1.    Positive
  2.    Negative
  3.    Constant
  4.    Zero
 Discuss Question
Answer: Option B. -> Negative
Answer: (b).Negative
Question 74. Which type of problem is caused in filter due to the accumulation of solids on the top surface of filter media?
  1.    Clogging
  2.    Air binding
  3.    Sand incrustation
  4.    Sand leakage
 Discuss Question
Answer: Option A. -> Clogging
Answer: (a).Clogging
Question 75. What is the permissible negative head loss of a rapid sand filter?
  1.    0.2-1m
  2.    0.1-0.5m
  3.    0.5-2m
  4.    0.8-1.2m
 Discuss Question
Answer: Option D. -> 0.8-1.2m
Answer: (d).0.8-1.2m
Question 76. _______ type of trouble in filter is caused by the released of dissolved air and gases from water.
  1.    Air binding
  2.    Clogging
  3.    Mud balls
  4.    Jetting
 Discuss Question
Answer: Option A. -> Air binding
Answer: (a).Air binding
Question 77. In which type of filtration problem, layers of gravel are displaced?
  1.    Clogging
  2.    Air binding
  3.    Sand incrustation
  4.    Sand leakage
 Discuss Question
Answer: Option D. -> Sand leakage
Answer: (d).Sand leakage
Question 78. The tendency of jetting can be minimized by __________
  1.    Carbonating the water
  2.    Proportioning of layers of sand and gravel
  3.    Surface washing
  4.    Control of algae growth in the water
 Discuss Question
Answer: Option C. -> Surface washing
Answer: (c).Surface washing
Question 79. How the problem of sand incrustation can be minimized?
  1.    Carbonating the water
  2.    Proportioning of layers of sand and gravel
  3.    Surface washing
  4.    Control of algae growth in the water
 Discuss Question
Answer: Option A. -> Carbonating the water
Answer: (a).Carbonating the water
Question 80. In which of the following filters, the rate of filtration is highest?
  1.    Slow sand filter
  2.    Rapid sand filter
  3.    Pressure filter
  4.    Roughing filter
 Discuss Question
Answer: Option C. -> Pressure filter
Answer: (c).Pressure filter

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