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MCQs

Total Questions : 62 | Page 2 of 7 pages
Question 11. Maintenance cost varies from
  1.    0-4% of the capital cost
  2.    12-16% of the capital cost
  3.    4-8% of the capital cost
  4.    8-12% of the capital cost
 Discuss Question
Answer: Option C. -> 4-8% of the capital cost
Answer: (c).4-8% of the capital cost
Question 12. Assuming the laminar flow across the filter, the rate of filtration (dVf/dt) can be expressed as a function of pressure drop Dp by the modified D'Arcy's equation as (where A is the area of filtering surface, K is the D'Arcy's filter cake permeability and L is the thickness of the filter cake)
  1.    (1/A) dVf/dt = Δp/μ(L/K)
  2.    dVf/dt = (1/A)Δp/μ(L/K)
  3.    (1/A) dVf/dt = Δp/μ LK
  4.    dVf/dt = (1/A)Δp/μ LK
 Discuss Question
Answer: Option A. -> (1/A) dVf/dt = Δp/μ(L/K)
Answer: (a).(1/A) dVf/dt = Δp/μ(L/K)
Question 13. The optimum wet solid content for the cell suspension for a bead mill is typically somewhere between
  1.    5-15% by volume
  2.    15-30% by volume
  3.    30-60% by volume
  4.    60-90% by volume
 Discuss Question
Answer: Option C. -> 30-60% by volume
Answer: (c).30-60% by volume
Question 14. Filtration leaf test results indicate that the filtration rate of a protein product is 100 dry lbs/(ft2 hr). What size production filter would be required to obtain 100 dry lbs of filter cake/hr?
  1.    1.54 ft2
  2.    3.08 ft2
  3.    65 ft2
  4.    65 lbs/ ft2.hr
 Discuss Question
Answer: Option A. -> 1.54 ft2
Answer: (a).1.54 ft2
Question 15. Selectivity can be expressed as
  1.    ratio of the distribution coefficients in different solute
  2.    mass fraction of the solute in the extract phase at equilibrium
  3.    mass fraction of the solute in the raffinate phase
  4.    ratio of the mass fraction of the solute in the extract phase to the raffinate phase
 Discuss Question
Answer: Option A. -> ratio of the distribution coefficients in different solute
Answer: (a).ratio of the distribution coefficients in different solute
Question 16. If the solute passes through membrane freely, the the rejection coefficient (s) is
  1.    1
  2.    0
  3.    >1
  4.    <1
 Discuss Question
Answer: Option B. -> 0
Answer: (b).0
Question 17. Which of the operation does not come under upstream processing?
  1.    Media preparation
  2.    Inoculum development
  3.    Effluent treatment
  4.    Storage of raw material
 Discuss Question
Answer: Option C. -> Effluent treatment
Answer: (c).Effluent treatment
Question 18. The conventional filtration involves the separation of large particles generally
  1.    dp>5μm
  2.    dp>10μm
  3.    dp>15μm
  4.    dp>20μm
 Discuss Question
Answer: Option B. -> dp>10μm
Answer: (b).dp>10μm
Question 19. In antibiotic manufacturing processes, the fermentation time ranges from
  1.    2-3 weeks
  2.    1-2 weeks
  3.    4-5 weeks
  4.    2-4 weeks
 Discuss Question
Answer: Option C. -> 4-5 weeks
Answer: (c).4-5 weeks
Question 20. If the membrane rejects all solute, the rejection coefficient (s) is
  1.    1
  2.    0
  3.    >1
  4.    <1
 Discuss Question
Answer: Option A. -> 1
Answer: (a).1

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