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MCQs

Total Questions : 73 | Page 7 of 8 pages
Question 61. . 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
Question 62. . 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
Question 63. . 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
Question 64. . The heat conduction in dry air is
  1.    less rapid than in steam
  2.    more rapid than in steam
  3.    similar to steam
  4.    none of these
 Discuss Question
Answer: Option A. -> less rapid than in steam
Question 65. . The heated medium passes through a holding section, which is usually maintained in
  1.    adiabatic conditions
  2.    isothermal conditions
  3.    isotropic conditions
  4.    isobaric conditions
 Discuss Question
Answer: Option A. -> adiabatic conditions
Question 66. . The K used in the equation for X10=2.303/K depends upon
  1.    nature of the filter material
  2.    linear velocity of the air passing through filter
  3.    both (a) and (b)
  4.    thickness of the filter
 Discuss Question
Answer: Option C. -> both (a) and (b)
Question 67. . 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
Question 68. . The mechanical means of accomplishing sterilization of fermentation media/equipment is
  1.    ultrasonic
  2.    radiation
  3.    chemical agents
  4.    none of these
 Discuss Question
Answer: Option A. -> ultrasonic
Question 69. . The moist heat is more effective than the dry heat because the intrinsic heat resistance of vegetative cells is greatly
  1.    increased in a dry state
  2.    decreased in a dry state
  3.    increased in a wet state
  4.    decreased in a wet state
 Discuss Question
Answer: Option A. -> increased in a dry state
Question 70. . The radius of the filter with a depth of 14 cm required for a volumetric airflow rate of 10 m3/min is approximately
  1.    1.6 m
  2.    0.6 m
  3.    3
  4.    6m
 Discuss Question
Answer: Option B. -> 0.6 m

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