Q. Glass fibers are favorable as a filter medium because they give a

View solution

Q. Typical aeration rates for aerobic fermentation are

View solution

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

View solution

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

View solution

Q. The radius of the filter with a depth of 14 cm required for a volumetric airflow rate of 10 m3/min is approximately

View solution

Q. The moist heat is more effective than the dry heat because the intrinsic heat resistance of vegetative cells is greatly

View solution

Q. The destruction of microorganisms by steam may be described as

View solution

Q. The collection efficiency by interception increases with the

View solution

Q. For indirect heating, the plate and frame heat exchanger is generally more effective than the shell and tube heat transfer due to its

View solution

Q. The mechanism of air filtration in fibrous filter is

View solution

Q. If the packing density (α) is defined as the volume of the fiber unit volume of filter bed, the velocity within the filter void space is equal to (where V is velocity in fluid void space and V0 is undisturbed fluid velocity)

View solution

Q. For the turbulent flow, the dispersion coefficient is correlated as a function of

View solution

Q. In sterilization process, spore of which of the following organism is considered as control?

View solution

Q. 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')

View solution

Q. The typical size of particles collected by diffusion mechanism is

View solution

Q. The X90 value for a filtration system is

View solution

Q. The value of K

View solution

Q. Model proposed by the Friedlander, correlating the air filtration efficiency by impaction can be expressed as (where NSt is the Stokes number)

View solution

Q. The collection efficiency by impaction increases with

View solution

Q. The efficiency of fibrous filter by combined mechanism is given by(where ηimp,ηint,ηdif are the efficiencies by impaction, interception and diffusion respectively)

View solution