The drying time between fixed moisture content within diffusion controlled 'falling rate period' is proportional to (assuming that drying occurs from all surfaces of the solid) (where, T = thickness of the solid) ?
Correct answer: C. T2
- A. √T
- B. T
- C. T2
- D. T3
Explanation
In a diffusion-controlled falling-rate period, the drying time follows the characteristic diffusion time, which varies as length squared. Hence, for solid thickness T, the time is proportional to T².
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
Practise Mass Transfer Operations
669 free Mass Transfer Operations MCQs from Chemical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemical Engineering questions like this
Chemical Engineering is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
More Mass Transfer Operations questions
The critical moisture content in case of drying indicates the _______________ rate period?
Separation of two volatile liquids by distillation makes use of their________________________?
The minimum liquid rate to be used in an absorber corresponds to an operating line_______________________?
The dew point of an unsaturated gas-vapor mixture does not depend upon the ____________________ of the mixture?
The slope of 9-line is determined by the______________________?
Freundlich equation applies to the adsorption of solute from_____________________?