A. Extractive distillation
B. Evaporation
C. Leaching
D. Absorption
Related Mcqs:
- A graph between _____________ is called Wilson plot?
A. (1/U) Vs. (1/v0.8)
B. (1/v0.8) Vs. U
C. v0.8 Vs . U
D. (1/U) Vs. (1/V) - Heat flux increases with temperature drop beyond the Leiden frost point in the plot of heat flux vs. temperature drop for a boiling liquid, because___________________?
A. Convection becomes important
B. Conduction becomes important
C. Radiation becomes important
D. Sub-cooled boiling occurs - A hot liquid is kept in a big room. The logarithm of the numerical value of the temperature difference between the liquid and the room is plotted against time. The plot will be very nearly a/an___________________?
A. Ellipse
B. Straight line
C. Parabola
D. Circular arc - The driving potential for the crystal growth during crystallisation is the _______________ of the solution?
A. Concentration
B. Viscosity
C. Super-saturation
D. Density - The ratio of velocity head to tube side return loss in case of a multipass shell and tube heat exchanger is ________________?
A. 2
B. 1/2
C. 4
D. 1/4 - At constant temperature, the thermal conductivities of gases _____________ with rise in pressure?
A. Decrease
B. Increase
C. Remain unchanged
D. May increase or decrease; depends on the pressure - Which one gives the monochromatic emissive power for black body radiation ?
A. Planck’s law
B. Kirchhoff’s law
C. Wien’s law
D. Stefan-Boltzmann law - Pick out the wrong statement ?
A. Economy of a multiple effect evaporator is not influenced by the boiling point elevation
B. Two identical cubes of iron and copper will have the same heat content under the same
conditions of temperature
C. Double pipe heat exchangers are mostly used in the field of refrigeration
D. Finned tube heat exchangers are suitable for heating air by steam - The rate of emission of radiation by a body does not depend upon the__________________?
A. Wavelength of radiation
B. Surface temperature of the body
C. Nature of the surface
D. Shape and porosity of the body - The Dittus-Boelter equation for convective heat transfer [(i.e. h = 0.023 (K/D) (Re)0.8 (Pr)0.4] cannot be used for________________?
A. Low Reynold’s number
B. Very low Grashoff number
C. Molten metals
D. All A., B. and C.