Stanton
Sherwood
Peclet
None of these
✅ The correct answer is option C.
Chemical Engineering MCQs
An air-water vapour mixture has a dry bulb temperature of 60°C and a dew point temperature of 40°C. The total pressure is 101.3 kPa and the vapour pressure of water at 40°C and 60°C are 7.30 kPa and 19.91 kPa respectively.The humidity of air sample expressed as kg of water vapour/kg of dry air is
0.048
0.079
0.122
0.152
✅ The correct answer is option D.
The equipment used in the extraction of highly corrosive radio active liquids is
Pulse column
Spray column
Mixer settler
Baffle tower
✅ The correct answer is option A.
Rose oil is extracted from rose leaves using __________ distillation.
High pressure
Low pressure
Extractive
Steam
✅ The correct answer is option D.
Desirable value of absorption factor in an absorber is
1
< 1
> 1
0.5
✅ The correct answer is option C.
H₂S is being absorbed in a gas absorber unit. The height of the transfer unit based on the overall mass transfer coefficient on the gas side is 0.4 m. The equilibrium data is given by, y = 1.5 x. The bulk concentration of H₂S has to be reduced from 0.05 to 0.001 mole fraction in the gas side. The height of the tower (in metres) corresponding to an operating line given by, y = 5x + 0.001 is
2
1.56
1
0.56
✅ The correct answer is option A.
Steady state equimolal counter diffusion is encountered in
Separation of a binary mixture by distillation
Absorption of NH₃ from air by water
All liquid-liquid diffusion systems
All of the above
✅ The correct answer is option A.
The falling rate period in the drying of a solid is characterised by
Increase in rate of drying
Increasing temperatures both on the surface and within the solid
Decreasing temperatures
None of these
✅ The correct answer is option B.
In most of the mechanically agitated liquid-liquid extractors, baffles or horizontal compartmental plates are provided, which helps in
Reducing the axial mixing
Increasing the rate of extraction
Maintaining the concentration difference between the two phases
All of the above
✅ The correct answer is option D.
Adsorption is an unit operation which generally involves __________ systems.
Liquid-solid
Gas-solid
Fluid-solid
Solid-solid
✅ The correct answer is option C.