A. < 1 and ≈ 1
B. 1 and 0
C. > 1 and ≈ 1
D. 0 and ≈ 1
A. Increase in rate of drying
B. Increasing temperatures both on the surface and within the solid
C. Decreasing temperatures
D. None of these
The falling rate period in the drying of a solid is characterised by__________________? Read More »
Mass Transfer A. Increasing temperature
B. Decreasing pressure
C. Increasing pressure
D. No means
Azeotropism for ethyl alcohol-water system disappears by_____________________? Read More »
Mass Transfer A. The entire amount of C is transferred to solvent B
B. Less than 2 kg but more than 1 kg of C is transferred to solvent B
C. Less than 1 kg of C is transferred to B
D. No amount of C is transferred to B
A. 4
B. 8
C. 9
D. 10
A. Rotary
B. Fluidised bed
C. Vacuum
D. Spray
Sand is dried in foundries in a ______________________drier? Read More »
Mass Transfer A. Unidirectional diffusion from liquid to gas phase
B. Unidirectional diffusion from gas to liquid phase
C. Either A. or B.
D. A counter diffusion at an almost equal molar rate
A. Silica gel
B. Alumina
C. Fuller’s earth
D. Activated carbon
Which of the following adsorbent is used to decolourise yellow glycerine ? Read More »
Mass Transfer A. Toor and Marcello
B. Fick
C. Danckwerts
D. Stefan
Surface renewal model of mass transfer was enunciated by___________________? Read More »
Mass Transfer A. 1.2 to 1.5
B. 2.5 to 3
C. 3 to 4
D. 5
