Test: Mass Transfer - 4 - Chemical Engineering MCQ
25 Questions MCQ Test - Test: Mass Transfer - 4
The equilibrium liquid composition compared to the vapor composition in case of azeotropic mixture is
Out of the following gas-liquid contacting devices, for a given set of operating conditions, gas pressure drop is the least in __________ tower.
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Pick out the system with minimum boiling azeotrope at 1 atm.
Free flowing granular materials can be best dried in a __________ drier.
In case of an ideal solution, the total vapor pressure varies __________ with the composition expressed as mole fraction,
Corresponding to Nusselt number in heat transfer, the dimensionless group in mass transfer is the __________ number.
If the specific heats of a gas and a vapor are 0.2KJ/Kg.oK and 1.5 KJ/Kg.oK respectively, and the humidity is 0.01; the humid heat in KJ/oKg. is
Liquid diffusivity is of the order of __________ cm2 /second.
Estimate the feed rate, if the composition of the more volatile component in the feed is 50% and the residue is 10% and the equilibrium relation is given by y*= 1.975x. Also the rate of residue is 60 mol/hr.
At the same gas flow rate, the pressure drop in a packed tower being irrigated with liquid __________ that in dry packed tower.
Corresponding to Nusselt number in heat transfer, the dimensionless group in mass transfer is the __________ number.
If the specific heats of a gas and a vapor are 0.2KJ/Kg.oK and 1.5 KJ/Kg.oK respectively, and the humidity is 0.01; the humid heat in KJ/oKg. is
Liquid diffusivity is of the order of __________ cm2 /second.
The solvent used in liquid extraction should not have high latent heat of vaporisation, because
At the same gas flow rate, the pressure drop in a packed tower being irrigated with liquid __________ that in dry packed tower.
Which of the following binary systems is an example of a maximum boiling azeotrope ?
(NRe . NSc) is termed in mass transfer operation as the __________ number.
The binary diffusivity in gases and liquids vary respectively as
Very tall packed towers are divided into series of beds to
Moisture contained by a substance in excess of the equilibrium moisture is called the __________ moisture.
With increase in temperature, the solubility of gases in liquids, at fixed pressure
In most of the vacuum crystalliser, vacuum is generally produced by means of a
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