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MCQs

Total Questions : 181 | Page 9 of 19 pages
Question 81. The final loss of head in slow sand filter is ______ than rapid sand filter.
  1.    Higher
  2.    Lower
  3.    Slightly Lower
  4.    Equivalent
 Discuss Question
Answer: Option B. -> Lower
Answer: (b).Lower
Question 82. The period of cleaning of a slow sand filter is ______ than rapid sand filter.
  1.    Smaller
  2.    Larger
  3.    Slightly smaller
  4.    Slightly larger
 Discuss Question
Answer: Option B. -> Larger
Answer: (b).Larger
Question 83. The bacterial removal efficiency of the rapid sand filter is ______ in comparison to slow sand filter.
  1.    More
  2.    Less
  3.    Equal
  4.    Better
 Discuss Question
Answer: Option B. -> Less
Answer: (b).Less
Question 84. How is the grain size distribution of sand in rapid sand filter?
  1.    Stratified
  2.    Unlayered
  3.    Layered with heaviest grains at the top
  4.    Layered with lightest grains at the top
 Discuss Question
Answer: Option D. -> Layered with lightest grains at the top
Answer: (d).Layered with lightest grains at the top
Question 85. The turbidity of water applied to rapid sand filter is less than _______
  1.    35-40ppm
  2.    10-20ppm
  3.    30-40ppm
  4.    10-15ppm
 Discuss Question
Answer: Option A. -> 35-40ppm
Answer: (a).35-40ppm
Question 86. The head loss through the bed of solids of the filter can be determined by __________
  1.    Carmen-Kozney equation
  2.    Rose equation
  3.    Carmen-Kozney and Rose equation
  4.    Charles equation
 Discuss Question
Answer: Option C. -> Carmen-Kozney and Rose equation
Answer: (c).Carmen-Kozney and Rose equation
Question 87. Which of the following has the highest shape factor as stated by Carmen?
  1.    Ottawa sand
  2.    Pulverized coal
  3.    Rounded coal
  4.    Angular sand
 Discuss Question
Answer: Option A. -> Ottawa sand
Answer: (a).Ottawa sand
Question 88. Which of the following is the expression of the Rose equation where symbols have their usual meanings?
  1.    hf = f* (L/(s *d)) * ((1-e) /e³) * (v²/g)
  2.    hf = f* (L/(s *d)) * ((1-e) /e³) * (v/g)
  3.    hf = f* (L/(s *d)) * ((1-e) /e⁴) * (v²/g)
  4.    hf = f* (L/(s *d)) * ((1-e) /e²) * (v²/g)
 Discuss Question
Answer: Option A. -> hf = f* (L/(s *d)) * ((1-e) /e³) * (v²/g)
Answer: (a).hf = f* (L/(s *d)) * ((1-e) /e³) * (v²/g)
Question 89. Which of the following is the expression of the Carmen equation where symbols have their usual meanings?
  1.    hf = f* (L/(s *d)) * ((1-e)/e³) * (v²/g)
  2.    hf = f* (L/(s *d)) * ((1-e)/e³) * (v/g)
  3.    hf = f* (L/(s *d)) * ((1-e)/e) * (v²/g)
  4.    hf = f* (L/(s *d)) * ((1-e)/e²) * (v²/g)
 Discuss Question
Answer: Option A. -> hf = f* (L/(s *d)) * ((1-e)/e³) * (v²/g)
Answer: (a).hf = f* (L/(s *d)) * ((1-e)/e³) * (v²/g)
Question 90. Which of the following represents the correct relation between dimensionless friction factor f and Reynolds number?
  1.    f = 150* ((1-e) /R²) + 1.75
  2.    f = 150* ((1-e) /R) +1.75
  3.    f = 150* ((1-e) /R³) + 1.75
  4.    f = 150* ((1-e²) /R) + 1.75
 Discuss Question
Answer: Option B. -> f = 150* ((1-e) /R) +1.75
Answer: (b).f = 150* ((1-e) /R) +1.75

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