Mass Transfer - Study Mode
[#116] During dehumidification of unsaturated air wet bulb temperature & partial pressure of vapor are not constant. However, during evaporative cooling process with recirculated water supply, the __________ remains constant.
Correct Answer
(A) Wet bulb temperature
[#117] Which of the following liquid-vapor contacting devices provides maximum contact surface area for a particular duty?
Correct Answer
(D) Wetted wall column
[#118] It takes 6 hours to dry a wet solid from 50% moisture content to the critical moisture content of 15%. How much longer it will take to dry the solid to 10% moisture content, under the same drying conditions? (The equilibrium moisture content of the solid is 5%).
Correct Answer
(C) 71 min
[#119] A pure drug is administered as a sphere and as a cube. The amount of drug is the same in the two tablets. Assuming that the shape and size do not influence the mass transfer, the ratio of rate of dissolution in water at t = 0 for the cubic to spherical tablet is
Correct Answer
(C) 1.24
[#120] Sticky material can be dried in a __________ dryer.
Correct Answer
(A) Tray