Corresponding to Prandtl number in heat transfer, the dimensionless group in mass transfer is the _______________ number?
A. Schmidt
B. Sherwood
C. Peclet
D. Stanton
Month: February 2019
Physical absorption is__________________?
Physical absorption is__________________?
A. An irreversible phenomenon
B. A reversible phenomenon
C. Accompanied by evolution of heat
D. Both B. and C.
Ion exchange process is similar to___________________?
Ion exchange process is similar to___________________?
A. Absorption
B. Adsorption
C. Extraction
D. Leaching
Only small amount of evaporation of water produces large cooling effects because of its___________________?
Only small amount of evaporation of water produces large cooling effects because of its___________________?
A. Large latent heat
B. Low viscosity
C. Small latent heat
D. None of these
As the reflux ratio decreases, the_________________?
As the reflux ratio decreases, the_________________?
A. Separation becomes more efficient
B. Number of plates increases
C. Column diameter increases
D. None of these
With increase in absolute humidity, the dew point of an unsaturated mixture of air and water vapor (at constant pressure and temperature) ?
With increase in absolute humidity, the dew point of an unsaturated mixture of air and water vapor (at constant pressure and temperature) ?
A. Increases
B. Remains unchanged
C. Decreases
D. Decreases linearly
Heat in BTU necessary to increase the temperature of 1 lb of gas and its accompanying vapour by 1°F is called the________________?
Heat in BTU necessary to increase the temperature of 1 lb of gas and its accompanying vapour by 1°F is called the________________?
A. Latent heat
B. Humid heat
C. Specific heat
D. Sensible heat
For which of the following unit operations, Lewis number is of significance ?
For which of the following unit operations, Lewis number is of significance ?
A. Adsorption
B. Binary distillation
C. Gas absorption
D. Humidification
The minimum number of theoretical plates is required for achieving a given separation in distillation column with_________________?
The minimum number of theoretical plates is required for achieving a given separation in distillation column with_________________?
A. No reflux
B. Total reflux
C. Zero reflux ratio
D. Minimum reflux ratio
The drying time between fixed moisture contents within the ‘constant rate period’ is proportional to (assuming that drying occurs from all surfaces of the solid) (where, T = thickness of the solid) ?
The drying time between fixed moisture contents within the ‘constant rate period’ is proportional to (assuming that drying occurs from all surfaces of the solid) (where, T = thickness of the solid) ?
A. √T
B. T
C. T1.5
D. T3