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MCQs

Total Questions : 181 | Page 6 of 19 pages
Question 51. What is Cᵤ in the expression Cᵤ= D₆₀/D₁₀ where D₆₀ and D₁₀ are the sizes of particle such that 60% and 10% of the particles are finer than these sizes respectively?
  1.    Coefficient of compaction
  2.    Coefficient of consolidation
  3.    Uniformity coefficient
  4.    Effective size
 Discuss Question
Answer: Option C. -> Uniformity coefficient
Answer: (c).Uniformity coefficient
Question 52. The value of specific gravity for Garnet sand is ____
  1.    2.1
  2.    3.6
  3.    4.2
  4.    5.1
 Discuss Question
Answer: Option C. -> 4.2
Answer: (c).4.2
Question 53. The effective size of sand of the slow sand filter is __________
  1.    0.1-0.2mm
  2.    0.2-0.3mm
  3.    0.4-0.7mm
  4.    1-2mm
 Discuss Question
Answer: Option B. -> 0.2-0.3mm
Answer: (b).0.2-0.3mm
Question 54. What is the value of specific gravity of sand filter?
  1.    2
  2.    2.6
  3.    3.1
  4.    3.5
 Discuss Question
Answer: Option B. -> 2.6
Answer: (b).2.6
Question 55. The value of uniformity coefficient for uniformly graded sand is ______
  1.    0
  2.    1
  3.    10
  4.    100
 Discuss Question
Answer: Option B. -> 1
Answer: (b).1
Question 56. Which of the following statement is correct?
  1.    Ignition loss of filter should not exceed 3%
  2.    Wearing loss of filter sand should not exceed 5%
  3.    The range of CU for the slow sand filter is 3-5
  4.    The range of CU for the rapid sand filter is 3-5
 Discuss Question
Answer: Option C. -> The range of CU for the slow sand filter is 3-5
Answer: (c).The range of CU for the slow sand filter is 3-5
Question 57. The thickness of the base material on which filter media are supported is __________
  1.    10-100cm
  2.    20-80cm
  3.    30-75cm
  4.    10-30cm
 Discuss Question
Answer: Option C. -> 30-75cm
Answer: (c).30-75cm
Question 58. The minimum number of filter beds in the slow sand filter is __________
  1.    1
  2.    2
  3.    3
  4.    3
 Discuss Question
Answer: Option B. -> 2
Answer: (b).2
Question 59. The depth of an enclosed tank of a slow sand filter lies in the range of ______
  1.    1-2m
  2.    2.5-4m
  3.    2-5m
  4.    3-5m
 Discuss Question
Answer: Option B. -> 2.5-4m
Answer: (b).2.5-4m
Question 60. When the fineness of sand increases __________
  1.    The bacterial efficiency increases
  2.    The rate of filtration increases
  3.    The rate of filtration first decrease, then increase
  4.    The bacterial efficiency remains constant
 Discuss Question
Answer: Option A. -> The bacterial efficiency increases
Answer: (a).The bacterial efficiency increases

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