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MCQs

Total Questions : 50 | Page 2 of 5 pages
Question 11. What is the horizontal velocity considered for grit chamber?
  1.    0.25-0.4m/sec
  2.    0.6-0.9 m/sec
  3.    1-2 m/sec
  4.    3-4m/sec
 Discuss Question
Answer: Option A. -> 0.25-0.4m/sec
Answer: (a).0.25-0.4m/sec
Question 12. At what depth are the air diffusers placed in the grit chamber?
  1.    0.6-0.9 m
  2.    1-2 m
  3.    0.1-0.4m
  4.    0.45-0.6 m
 Discuss Question
Answer: Option D. -> 0.45-0.6 m
Answer: (d).0.45-0.6 m
Question 13. Which of these is not a grit removal equipment installed in the aerated grit chamber?
  1.    Screw conveyers
  2.    Tubular conveyers
  3.    Jet pumps
  4.    Communitors
 Discuss Question
Answer: Option D. -> Communitors
Answer: (d).Communitors
Question 14. What is the detention time considered for aerated grit chamber?
  1.    5-6 mins
  2.    2-5 mins
  3.    1-2 mins
  4.    3-4 mins
 Discuss Question
Answer: Option B. -> 2-5 mins
Answer: (b).2-5 mins
Question 15. What is the amount of air supplied for these grit chambers?
  1.    1-2 m³/m.min
  2.    0.2-0.5 m³/m.min
  3.    0.5-0.8 m³/m.min
  4.    0.8-1 m³/m.min
 Discuss Question
Answer: Option B. -> 0.2-0.5 m³/m.min
Answer: (b).0.2-0.5 m³/m.min
Question 16. What is the opening of fine screens?
  1.    0.5 inch
  2.    1 inch
  3.    0.25 inch
  4.    0.15 inch
 Discuss Question
Answer: Option C. -> 0.25 inch
Answer: (c).0.25 inch
Question 17. Installing screens at an angle allows easier cleaning.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 18. In drum type screen, which axis does the drum rotate?
  1.    Horizontal
  2.    Vertical
  3.    Irregular
  4.    Horizo-vertical
 Discuss Question
Answer: Option A. -> Horizontal
Answer: (a).Horizontal
Question 19. Screen is the first unit operation in wastewater 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 20. Which of the following is true for screens and comminutors?
  1.    Unit operation
  2.    Unit process
  3.    Chemical treatment
  4.    pH balancer
 Discuss Question
Answer: Option A. -> Unit operation
Answer: (a).Unit operation

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