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MCQs

Total Questions : 181 | Page 2 of 19 pages
Question 11. What is the value of the uniformity coefficient in a rapid sand filter?
  1.    1
  2.    1.5
  3.    2
  4.    2.5
 Discuss Question
Answer: Option B. -> 1.5
Answer: (b).1.5
Question 12. What is the effective size of Anthracite when used as a filter material?
  1.    0.1-0.2mm
  2.    0.2-0.4mm
  3.    0.4-0.6mm
  4.    0.7-0.75mm
 Discuss Question
Answer: Option D. -> 0.7-0.75mm
Answer: (d).0.7-0.75mm
Question 13. Which of the following statement is wrong regarding Anthracite?
  1.    It requires less water
  2.    It is less inert to caustic solutions than sand
  3.    It is more costly per tonne than sand
  4.    It is used in industrial filters.
 Discuss Question
Answer: Option B. -> It is less inert to caustic solutions than sand
Answer: (b).It is less inert to caustic solutions than sand
Question 14. Consider the following statement regarding the depth of sand of the rapid gravity filter?
i. It should be checked against breakage of floc
ii. The sand depth should lie between 100-200cm
iii. The floc should be attached through the sand bed
Which of the above statement is/are correct?
  1.    Only i
  2.    i, ii
  3.    ii, iii
  4.    Only ii
 Discuss Question
Answer: Option A. -> Only i
Answer: (a).Only i
Question 15. The minimum depth of sand of a rapid sand filter is given by __________
  1.    Stokes formula
  2.    Clark’s formula
  3.    Hudson formula
  4.    Emden formula
 Discuss Question
Answer: Option C. -> Hudson formula
Answer: (c).Hudson formula
Question 16. The speed of impeller in a flash mixer is ___________The Speed Of Impeller In A Flash Mixer Is ___________
  1.    45rpm
  2.    60rpm
  3.    110rpm
  4.    200rpm
 Discuss Question
Answer: Option C. -> 110rpm
Answer: (c).110rpm
Question 17. Which of the following is correctly paired in the following figure?Which Of The Following Is Correctly Paired In The Following ...
  1.    C – Impeller
  2.    D – Outlet
  3.    F – Deflecting wall
  4.    E – Impeller
 Discuss Question
Answer: Option D. -> E – Impeller
Answer: (d).E – Impeller
Question 18. ‘C’ in the following figure represents the ________‘C’ In The Following Figure Represents The ________
  1.    Impeller
  2.    Impeller shaft
  3.    Deflecting wall
  4.    Flash mixer wall
 Discuss Question
Answer: Option C. -> Deflecting wall
Answer: (c).Deflecting wall
Question 19. Which of the following represents the impeller shaft in the following figure?Which Of The Following Represents The Impeller Shaft In The ...
  1.    F
  2.    E
  3.    C
  4.    B
 Discuss Question
Answer: Option A. -> F
Answer: (a).F
Question 20. The detention period of a flash mixer is _________________The Detention Period Of A Flash Mixer Is _________________
  1.    2 minutes
  2.    30 minutes
  3.    1 hour
  4.    2 hours
 Discuss Question
Answer: Option A. -> 2 minutes
Answer: (a).2 minutes

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