Q. Which of the following is not considered among the three best-known theories of interphase mass transfer?

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Q. Which of the following is most likely to cause an increase in the rate of oxygen transfer into a particular aerated fermentation system?

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Q. At 25°C, the saturation concentration of oxygen in water is 1.26 mmol/l and the partial pressure of oxygen is 1 atm. The Henry's law constant will be

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Q. Gas hold up, characterizing the hydrodynamics in a fermenter, mainly depends on the

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Q. Which of the following will have the highest surface area available for oxygen transfer?

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Q. A flooded impeller will lead to poor oxygen transfer rates because

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Q. Power consumption by agitation is

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Q. Which of the following impellers will provide radial flow?

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Q. When liquid is pumped through cooling coil in a stirred tank reactor to cool. Which of the following is not correct?

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Q. Swirling and vortex formation can be prevented by

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Q. Power number is expressed as

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Q. The power consumption in a stirring vessel can be assessed by using a

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Q. Surface renewal theory predicts that the mass transfer coefficient is

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Q. The oxygen transfer rate in a bioreactor will increase if

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Q. Which of the following impellers are used for wide range of viscosities?

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Q. Which of the following type(s) of stirrer can be used for microbiological processes?

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Q. The range of width for the baffle in the fermenter is __________ times of vessel diameter

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Q. The average concentration of oxygen in the boundary layers surrounding the bubbles (Co*) in a reactor is normally determined by

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Q. Why vortexing is undesirable in the agitation of biological systems?

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Q. What is the ratio of depth of liquid in vessel to the diameter of tank (H:Dt)?

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