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MCQs

Total Questions : 181 | Page 15 of 19 pages
Question 141. The pulsator clarifier is a type of __________
  1.    Horizontal flow sludge tank
  2.    Vertical flow sludge tank
  3.    Circular sludge tank
  4.    Plain sedimentation tank
 Discuss Question
Answer: Option B. -> Vertical flow sludge tank
Answer: (b).Vertical flow sludge tank
Question 142. Which device solved the problem of unstable hydraulic conditions and operation of sludge removal equipment?
  1.    Centrifugal pump
  2.    Pulsator clarifier
  3.    Tube settler
  4.    Flocculator
 Discuss Question
Answer: Option C. -> Tube settler
Answer: (c).Tube settler
Question 143. In which type of tube settler, tubes are slightly inclined in the direction of normal flow?
  1.    Solid contact clarifier
  2.    Steeply inclined tube settler
  3.    Vertical tube settler
  4.    Horizontal tube settler
 Discuss Question
Answer: Option D. -> Horizontal tube settler
Answer: (d).Horizontal tube settler
Question 144. In which device, the primary mixing is followed by a secondary reaction zone resulting in formation of sludge blanket?
  1.    Centrifugal pump
  2.    Flocculator
  3.    Tube settler
  4.    Solid contact clarifier
 Discuss Question
Answer: Option D. -> Solid contact clarifier
Answer: (d).Solid contact clarifier
Question 145. Which of the following statement is wrong regarding filtration?
  1.    It removes fine particle
  2.    It removes suspended solids not removed by sedimentation
  3.    It does not remove turbidity
  4.    It removes color
 Discuss Question
Answer: Option C. -> It does not remove turbidity
Answer: (c).It does not remove turbidity
Question 146. In which action of filtration, colloidal particles are removed?
  1.    Mechanical Straining
  2.    Sedimentation
  3.    Biological mechanism
  4.    Electrolytic action
 Discuss Question
Answer: Option B. -> Sedimentation
Answer: (b).Sedimentation
Question 147. In which action of filtration, particles coarser than the void size is arrested?
  1.    Mechanical Straining
  2.    Sedimentation
  3.    Biological mechanism
  4.    Electrolytic action
 Discuss Question
Answer: Option A. -> Mechanical Straining
Answer: (a).Mechanical Straining
Question 148. Schmutzdecke acts as an extremely fine meshed straining mat.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 149. Which is the first zone of purification in a sand bed?
  1.    Autotrophic zone
  2.    Heterotrophic zone
  3.    Schmutzdecke zone
  4.    Electrolytic zone
 Discuss Question
Answer: Option C. -> Schmutzdecke zone
Answer: (c).Schmutzdecke zone
Question 150. In which action of filtration, removal of particulate matter takes place?
  1.    Mechanical Straining
  2.    Sedimentation
  3.    Biological mechanism
  4.    Electrolytic action
 Discuss Question
Answer: Option D. -> Electrolytic action
Answer: (d).Electrolytic action

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