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MCQs

Total Questions : 88 | Page 2 of 9 pages
Question 11. The total area of the filter is called effective filter media.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 12. The elements that cause a filter to loose hydraulic capacity are referred to as ______
  1.    Hydraulic factors
  2.    Clogging factors
  3.    Draining factors
  4.    Filter factors
 Discuss Question
Answer: Option B. -> Clogging factors
Answer: (b).Clogging factors
Question 13. The air is dissolved in water or wastewater by natural means.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 14. Straining refers to the removal of smaller particles from a fluid.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 15. ________ is used to limit the cleaning of the screen.
  1.    Screening devices
  2.    Suction scanner
  3.    Alarm systems
  4.    Range systems
 Discuss Question
Answer: Option B. -> Suction scanner
Answer: (b).Suction scanner
Question 16. ________ is called ‘zero speed’.
  1.    Circular DAF
  2.    Rectangular DAF
  3.    DAF
  4.    Pressure vessel
 Discuss Question
Answer: Option A. -> Circular DAF
Answer: (a).Circular DAF
Question 17. What is the rotation time of the top bridge of DAF?
  1.    1 minute
  2.    2 minutes
  3.    3 minutes
  4.    4 minutes
 Discuss Question
Answer: Option C. -> 3 minutes
Answer: (c).3 minutes
Question 18. What does the performance of a Dissolved air floatation depend on?
  1.    Air to solid ratio
  2.    Air to oil ratio
  3.    Air to flow rate of water
  4.    Air to the grease ratio
 Discuss Question
Answer: Option A. -> Air to solid ratio
Answer: (a).Air to solid ratio
Question 19. What is the tank water depth?
  1.    10”
  2.    15”
  3.    18”
  4.    22”
 Discuss Question
Answer: Option C. -> 18”
Answer: (c).18”
Question 20. What are the typical A/S ratios encountered in a Dissolved air floatation method?
  1.    0.25-0.5
  2.    0.005-0.06
  3.    0.5-2
  4.    3-5
 Discuss Question
Answer: Option B. -> 0.005-0.06
Answer: (b).0.005-0.06

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