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MCQs

Total Questions : 50 | Page 5 of 5 pages
Question 41. What is the headloss through a communitor?
  1.    0.3-0.4 m
  2.    0.1-0.3 m
  3.    0.5-0.6 m
  4.    0.6-0.7 m
 Discuss Question
Answer: Option B. -> 0.1-0.3 m
Answer: (b).0.1-0.3 m
Question 42. In aerated grit chambers, there are no moving parts below the water surface.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 43. At what velocity will the particles settle down?
  1.    0.5 m/s
  2.    0.3 m/s
  3.    0.1 m/s
  4.    0.25 m/s
 Discuss Question
Answer: Option B. -> 0.3 m/s
Answer: (b).0.3 m/s
Question 44. A grit chamber is usually installed ______ primary sedimentation tanks.
  1.    Before
  2.    After
  3.    In between
  4.    In
 Discuss Question
Answer: Option A. -> Before
Answer: (a).Before
Question 45. Grit chamber is constructed to protect the further mechanical equipment of the water treatment plant.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 46. What is the cleaning period for manual grit chambers?
  1.    3 days
  2.    5 days
  3.    48 hours
  4.    1 week
 Discuss Question
Answer: Option D. -> 1 week
Answer: (d).1 week
Question 47. Grit chambers are constructed to prevent their accumulation in _______
  1.    Sedimentation tank
  2.    Sludge digesters
  3.    Coagulation tank
  4.    Sand filter
 Discuss Question
Answer: Option B. -> Sludge digesters
Answer: (b).Sludge digesters
Question 48. Stoke’s law holds good for Reynolds’s number ______
  1.    Less than 1
  2.    Equal to 1
  3.    Greater than 1
  4.    Nearer to 1
 Discuss Question
Answer: Option A. -> Less than 1
Answer: (a).Less than 1
Question 49. Grit chamber is similar to which of the following?
  1.    Screening unit
  2.    Sedimentation tank
  3.    Coagulation tank
  4.    Sand bed
 Discuss Question
Answer: Option B. -> Sedimentation tank
Answer: (b).Sedimentation tank
Question 50. What is the specific gravity of settleable particles in the grit chamber?
  1.    2.98
  2.    2.56
  3.    2.65
  4.    2.89
 Discuss Question
Answer: Option C. -> 2.65
Answer: (c).2.65

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