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

32. The mechanical means of accomplishing sterilization of fermentation media/equipment is

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

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

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

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