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MCQs

Total Questions : 80 | Page 6 of 8 pages
Question 51. What is the combined BOD and nitrogen removal level for moving bed bioreactor?
  1.    3-4 Kg BOD/m³
  2.    2-2.75 Kg BOD/m³
  3.    5 Kg BOD/m³
  4.    6 Kg BOD/m³
 Discuss Question
Answer: Option B. -> 2-2.75 Kg BOD/m³
Answer: (b).2-2.75 Kg BOD/m³
Question 52. Calculate the tank volume for the Moving bed bioreactor system for the following data.
Flow: 80 m³/h.
BOD: 300 mg/L
Retention time: 6 hrs
  1.    500 m³
  2.    600 m³
  3.    480 m³
  4.    120 m³
 Discuss Question
Answer: Option C. -> 480 m³
Answer: (c).480 m³
Question 53. Calculate the tank volume for the Moving bed bioreactor system for the following data.
Flow: 800 m³/h.
BOD: 300 mg/L
Retention time: 6 hrs
  1.    4500 m³
  2.    4800 m³
  3.    6500 m³
  4.    10500 m³
 Discuss Question
Answer: Option B. -> 4800 m³
Answer: (b).4800 m³
Question 54. Calculate the tank volume for the Moving bed bioreactor system for the following data.
Flow: 800 m³/h.
BOD: 1500 mg/L
Retention time: 8 hrs
  1.    5000 m³
  2.    6400 m³
  3.    8400 m³
  4.    9200 m³
 Discuss Question
Answer: Option B. -> 6400 m³
Answer: (b).6400 m³
Question 55. Calculate the tank volume for the Moving bed bioreactor system for the following data.
Flow: 500 m³/h.
BOD: 500 mg/L
Retention time: 8 hrs
  1.    800 m³
  2.    4000 m³
  3.    8000 m³
  4.    5000 m³
 Discuss Question
Answer: Option B. -> 4000 m³
Answer: (b).4000 m³
Question 56. _______ flows along with the reactants in MBR.
  1.    Pollutants
  2.    Microbes
  3.    Disinfectants
  4.    Catalytic materials
 Discuss Question
Answer: Option D. -> Catalytic materials
Answer: (d).Catalytic materials
Question 57. Which of the following is an advantage of MBR?
  1.    Heat transfer
  2.    Fluid reactant
  3.    Solid distribution
  4.    Selectivity
 Discuss Question
Answer: Option D. -> Selectivity
Answer: (d).Selectivity
Question 58. Moving bed reactors are closed systems.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 59. Reactants enter from the bottom in MBR.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 60. Which of the following is a disadvantage of MBR?
  1.    Catalyst regeneration
  2.    Flow characteristics
  3.    Catalyst cost
  4.    Heat transfer
 Discuss Question
Answer: Option D. -> Heat transfer
Answer: (d).Heat transfer

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