Sterilization – Section 1


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31. The K used in the equation for X10=2.303/K depends upon

A. nature of the filter material
B. linear velocity of the air passing through the filter
C. both (a) and (b)
D. thickness of the filter

Correct Answer: C. both (a) and (b)
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32. The mechanical means of accomplishing sterilization of fermentation media/equipment is

A. ultrasonic
B. radiation
C. chemical agents
D. none of these

Correct Answer: A. ultrasonic
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33. The radius of the filter with a depth of 14 cm required for a volumetric airflow rate of 10 m3/min is approximately

A. 1.6 m
B. 0.6 m
C. 3
D. 6 m

Correct Answer: B. 0.6 m
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34. The moist heat is more effective than the dry heat because the intrinsic heat resistance of vegetative cells is greatly

A. increased in a dry state
B. decreased in a dry state
C. increased in a wet state
D. decreased in a wet state

Correct Answer: A. increased in a dry state
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35. The destruction of microorganisms by steam may be described as

A. first order chemical reaction
B. zero order chemical reaction
C. second order chemical reaction
D. none of these

Correct Answer: A. first order chemical reaction
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