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MCQs

Total Questions : 135 | Page 1 of 14 pages
Question 1. Rapid filtration is used as the _______ clarifying step in municipal water treatment plants.
  1.    First
  2.    Second
  3.    Intermediate
  4.    Final
 Discuss Question
Answer: Option D. -> Final
Answer: (d).Final
Question 2. Biological action takes place in a rapid filtration unit.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 3. How many hours does it take for filters to attain turbidity breakthrough?
  1.    12-16 hours
  2.    18-22 hours
  3.    23-36 hours
  4.    38-42 hours
 Discuss Question
Answer: Option C. -> 23-36 hours
Answer: (c).23-36 hours
Question 4. Air is blown in the reverse direction during cleaning of filter beds.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 5. What is the maximum head loss at which the filter should be cleaned?
  1.    1.5 m
  2.    2 m
  3.    2.5 m
  4.    3 m
 Discuss Question
Answer: Option C. -> 2.5 m
Answer: (c).2.5 m
Question 6. For roughing type trickling filters what would be the BOD removal rate?
  1.    50-80%
  2.    60-90%
  3.    80-90%
  4.    40-70%
 Discuss Question
Answer: Option D. -> 40-70%
Answer: (d).40-70%
Question 7. In which type of trickling filter very low power is consumed?
  1.    Low or standard filtration rate(Rock type)
  2.    Intermediate filtration rate (Rock type)
  3.    High filtration rate (Rock type)
  4.    High filtration rate (Plastic type)
 Discuss Question
Answer: Option A. -> Low or standard filtration rate(Rock type)
Answer: (a).Low or standard filtration rate(Rock type)
Question 8. In which type of trickling filter very high power is consumed?
  1.    Low or standard filtration rate(Rock type)
  2.    Intermediate filtration rate (Rock type)
  3.    High filtration rate (Rock type)
  4.    Roughing (Plastic/Rock type)
 Discuss Question
Answer: Option D. -> Roughing (Plastic/Rock type)
Answer: (d).Roughing (Plastic/Rock type)
Question 9. When filled which of the following material only nitrogen is removed?
  1.    River rock (Large)
  2.    River rock (Small)
  3.    Plastic conventional
  4.    Plastic random packing-conventional
 Discuss Question
Answer: Option B. -> River rock (Small)
Answer: (b).River rock (Small)
Question 10. In which type of trickling filter is nitrogen oxidized?
  1.    Low or standard filtration rate(Rock type)
  2.    Intermediate filtration rate (Rock type)
  3.    High filtration rate (Rock type)
  4.    Roughing (Plastic/Rock type)
 Discuss Question
Answer: Option A. -> Low or standard filtration rate(Rock type)
Answer: (a).Low or standard filtration rate(Rock type)

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