Chemical Engineering MCQs

6108 MCQs  (Page 193 of 611)

Attempt Chemical Engineering Quiz
Azeotropism for ethyl alcohol-water system disappears by_____________________?
A. Increasing temperature
B. Decreasing pressure
C. Increasing pressure
D. No means
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The falling rate period in the drying of a solid is characterised by__________________?
A. Increase in rate of drying
B. Increasing temperatures both on the surface and within the solid
C. Decreasing temperatures
D. None of these
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Schmidt number and Lewis number for pure air at atmospheric conditions are respectively__________________?
A. < 1 and ≈ 1
B. 1 and 0
C. > 1 and ≈ 1
D. 0 and ≈ 1
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Diffusion co-efficient generally depends upon the temperature, pressure & the nature of the components of the system. Its dimension is not the same as that of the_________________?
A. Mass transfer co-efficient
B. Thermal diffusivity
C. Kinematic viscosity
D. Volumetric diffusivity
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Which of the following equipments is not used for liquid dispersion ?
A. Wetted wall towers
B. Packed towers
C. Venturi scrubbers
D. Agitated vessels
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The solvent used in liquid-liquid extraction should have _______________ less than one?
A. Selectivity
B. Distribution co-efficient
C. Both a. and b.
D. Neither a. nor b.
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Out of the following gas-liquid contacting devices, for a given set of operating conditions, gas pressure drop is the least in ______________ tower?
A. Wetted wall
B. Bubble cap
C. Perforated tray
D. Packed
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Ordinary diffusion process is also called ______________ diffusion?
A. Pressure
B. Thermal
C. Concentration
D. Forced
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Decoction refers to the use of solvent________________?
A. At ambient temperature
B. At its boiling point
C. In its vapor form
D. None of these
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The binary diffusivity in gases and liquids vary respectively as_________________?
A. T3/2 and t
B. T and t3/2
C. √t and t3/2
D. T3/2 and √t
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Word of the Day
27 Jul
Widen
make or become wider.
چوڑا ہونا، کشادہ کرنے کا عمل

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