Q. Detergent like substances produced by microorganisms during a fermentation will lead to

View solution

Q. In the design of a paddle agitator, the ratio of paddle diameter to tank diameter is normally taken as

View solution

Q. The oxygen absorption rate can be determined by

View solution

Q. Industrial paddle agitators turn at the speed of

View solution

Q. The dynamic technique is based on the

View solution

Q. The addition of antifoams to an aerated bioreactor will decrease oxygen transfer rates because antifoams

View solution

Q. Which of the following will have the largest interfacial area per unit volume?

View solution

Q. Which device is commonly used for measuring the rate of rotation (rpm) of the stirrer shaft?

View solution

Q. Laminar flow range of mixing speed is obtained for

View solution

Q. Which of the following number is calculated from the diameter and peripheral speed of the impeller?

View solution

Q. A higher liquid height will lead to a higher gas hold up by which the oxygen transfer rate will be

View solution

Q. The main function of the dimples provided in the cooling jacket is to

View solution

Q. The power required by an agitator operating in a gas-sparged system is

View solution

Q. Axial flow impellers

View solution

Q. Bioreactors, where vortex is formed, another dimensionless number, __________ is useful.

View solution

Q. Oxygen transfer rate is increased with an increase in the stirrer speed in aerated bioreactor because

View solution

Q. If the stirring speed increased from 300 to 500 rpm leads to an increase in the reaction rate by two folds. Then it may be concluded that

View solution

Q. An increase in the heat transfer in the stirred tank reactor will be observed at

View solution

Q. The effect of increasing the stirrer speed in an unbaffled stirred tank reactor is that

View solution

Q. Turbulent flow range of mixing speed is obtained for

View solution