A. Packed tower
B. Bubble-cap plate column
C. Sieve-plate column
D. Wetted wall column
Which of the following provides maximum contact surface for a liquid-vapour system ? Read More »
Mass Transfer A. Diffusion co-efficient
B. Mass transfer co-efficient
C. NTU
D. None of these
Experimental determination of ________________ is done by wetted wall column method? Read More »
Mass Transfer A. Schmidt number
B. Sherwood number
C. Lewis relationship
D. Froude number
Which is not concerned directly with mass transfer ? Read More »
Mass Transfer A. Interfacial surface between liquid and gas phase should be large
B. Time of contact between the two phases should be less
C. Gas velocity should be very low
D. Liquid entrainment should be severe
To get high tray efficiency___________________? Read More »
Mass Transfer A. No change in theoretical
B. Marginal decrease in the number of
C. Major decrease in the number of
D. None of these
A. Sc × Pr
B. Pr × St
C. Sh × Pr
D. St × Sh
Lewis number (Le) is____________________? Read More »
Mass Transfer A. Liquid stream should be distributed uniformly
B. Gas stream should be distributed uniformly
C. Both gas as well as liquid streams should be distributed uniformly
D. By passing should be completely avoided
A. Molal
B. Relative
C. Percentage
D. None of these
A. Providing irregular grain size
B. Providing minimum percentage of voids
C. Having maximum possible points of contact
D. None of these
A. Centrifugal extractor
B. Pachuca tanks
C. Bollman extractor
D. None of these
Leaching of uranium ore and gold ore is done in_____________________? Read More »
Mass Transfer