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MCQs

Total Questions : 73 | Page 2 of 8 pages
Question 11. For the turbulent flow, the dispersion coefficient is correlated as a function of
  1.    Reynolds number
  2.    Sherwood number
  3.    Schmidt number
  4.    Grashof number
 Discuss Question
Answer: Option A. -> Reynolds number
Answer: (a).Reynolds number
Question 12. In sterilization process, spore of which of the following organism is considered as control?
  1.    Bacillus subtilis
  2.    Clostridium botulinum
  3.    Bacillus stearothermophilus
  4.    Aspergillus niger
 Discuss Question
Answer: Option C. -> Bacillus stearothermophilus
Answer: (c).Bacillus stearothermophilus
Question 13. The typical size of particles collected by diffusion mechanism is
  1.    <0.25μm
  2.    <0.5μm
  3.    <0.75μm
  4.    <1μm
 Discuss Question
Answer: Option B. -> <0.5μm
Answer: (b).<0.5μm
Question 14. Analogus to the molecular diffusion, the x-directional flux of microorganisms suspended in a medium due to the axial mixing can be represented as (where Jn is flux component 'n', cn is concentration of'n')
  1.    Jn = -dcn/dx
  2.    Jn = dcn/dx
  3.    Jn = -D dcn/dx
  4.    Jn = D dcn/dx
 Discuss Question
Answer: Option C. -> Jn = -D dcn/dx
Answer: (c).Jn = -D dcn/dx
Question 15. The X90 value for a filtration system is
  1.    the time required to reduce microbial population by 90%
  2.    the time required to traverse survivor curve by one log cycle.
  3.    the depth required to reduce population by 90%
  4.    the depth of the filter required to reduce population by 99%
 Discuss Question
Answer: Option C. -> the depth required to reduce population by 90%
Answer: (c).the depth required to reduce population by 90%
Question 16. For laminar flow of Newtonian fluid through a smooth round pipe, the ratio of average fluid velocity to the maximum velocity is
  1.    0.5
  2.    0.75
  3.    0.87
  4.    0.37
 Discuss Question
Answer: Option A. -> 0.5
Answer: (a).0.5
Question 17. The reduction of number of cells from 1010 to one will result into the del factor (Δ) of
  1.    1
  2.    10
  3.    23
  4.    103
 Discuss Question
Answer: Option C. -> 23
Answer: (c).23
Question 18. The collection efficiency by the inertial impaction mechanism is the function of
  1.    Stokes and Reynolds number
  2.    Stokes and Schmidt number
  3.    Grashoff and Reynolds number
  4.    Stokes and Grashof number
 Discuss Question
Answer: Option A. -> Stokes and Reynolds number
Answer: (a).Stokes and Reynolds number
Question 19. The highest temperature which appears to be feasible for batch sterilization is
  1.    121°C
  2.    100°C
  3.    105°C
  4.    130°C
 Discuss Question
Answer: Option A. -> 121°C
Answer: (a).121°C
Question 20. Sterilization can be carried out by
  1.    heat
  2.    radiation
  3.    chemical agents
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Answer: (d).all of these

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