Q. Lewis number (Le) is

View solution

Q. Pick out the wrong statement:

View solution

Q. In liquid extraction, if the selectivity is unity, then

View solution

Q. Paper industry employs __________ driers.

View solution

Q. Which of the following has the same dimension as mass diffusivity ?

View solution

Q. Pick out the wrong statement pertaining to the cooling towers.

View solution

Q. Perforated plate towers are unique for solvent extraction because, they provide

View solution

Q. In case of absorption & stripping, the interface of the liquid & gas phases are present in equilibrium, when the diffusional resistance of __________ is zero.

View solution

Q. Pick out the wrong statement pertaining to the analogy between equations of heat and mass transfer operations.

View solution

Q. The slope of the operating line for a single component co-current absorber when plotted in terms of mole ratio units is

View solution

Q. The individual mass transfer co-efficients (moles/m² . s) for absorption of a solute from a gas mixture into a liquid solvent are, KL = 4.5 and KG = 1.5. The slope of the equilibrium line is 3. Which of the following resistance (s) is (are) controlling ?

View solution

Q. Measurement of the interfacial area of mass transfer is achieved easily & accurately in case of a __________ coloumn.

View solution

Q. With the lowering of equiliDrium pressure, at a given temperature, the amount of ad-sorbate on the adsorbent

View solution

Q. Mass transfer co-efficient is defined as

View solution

Q. When an unsaturated air-water mixture is heated at constant pressure, then

View solution

Q. During sensible cooling process

View solution

Q. Experiments were conducted to determine the flux of a species A in a stagnant medium across a gas-liquid interface. The overall mass transfer co-efficient based on the liquid side for dilute systems for the above was estimated to be 4 x 10⁻³ kg mole/m².s. The equilibrium data for the system is given as y = 2x. The flux across the interface (in kg mole/m² .s) for bulk concentrations of A in gas phase and liquid phase as y = 0.4 and x = 0.01 respectively is

View solution

Q. Leaching of coarse solid lumps is also termed as

View solution

Q. The main reason for dividing a tall packed tower into series of small towers is to

View solution

Q. Co-current absorbers are usually used when the gas to be dissolved in the liquid is

View solution