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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

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Chemical Engineering MCQs designed for job test and interview preparation, particularly for fresh graduates, students, and candidates appearing in competitive exams. These multiple-choice questions cover important topics such as the fundamentals of chemical engineering, chemical processes, chemical reactions, process control, and instrumentation, along with other key concepts in the field.

All Topics  9594

Pick out the wrong statement?
A When the concentration difference for the mass transfer becomes zero at the bottom of the gas
B The average distance between the operating line and equilibrium line is large, when the liquidgas
C The operating line lies above the equilibrium curve in case of a gas desorber
D With decrease in the liquid flow rate for a fixed gas flow rate, the slope of the operating line
Correct Answer: The operating line lies above the equilibrium curve in case of a gas desorber
Pick out the correct statement ?
A In case of liquid-liquid extraction, no separation is possible, if the selectivity of the solvent
B With increase in temperature, the selectivity of the solvent used in solvent extraction
C The selectivity of solvent used in solvent extraction is unity at the plait point
D All A., B. and C.
Correct Answer: All A., B. and C.
Pick out the wrong statement?
A In the McCabe-Thiele diagram for binary distillation, vertical feed line represents saturated
B In small columns, local efficiency is larger than Murphree efficiency; in large columns local
C For Laminar flow over a plate of length L, the local mass transfer co-efficient at a distance L
D The concentration and hydrodynamic boundary layers over a flat plate are of equal thickness,
Correct Answer: For Laminar flow over a plate of length L, the local mass transfer co-efficient at a distance L
Pick out the wrong statement ?
A Cellulose acetate membranes are used in dialysis process
B Elutriation process refers to when the soluble material is largely concentrated on the surface of
C ‘Cascade’ means a group of stages interconnected so that various streams flow from one to
D Zirconia probe is used for the humidity measurement
Correct Answer: Zirconia probe is used for the humidity measurement
Pick out the wrong statement?
A The operating line always lies above the equilibrium solubility curve in case of a single
B The operating line always lies below the equilibrium solubility curve in case of a single
C The operating pressure in solvent extraction system should be below vapor pressures of all
D The solubility of a particular gas in ideal solution in any solvent is always the same
Correct Answer: The operating pressure in solvent extraction system should be below vapor pressures of all
Pick out the wrong statement?
A Critical moisture content is not a property of the material itself
B A sharp increase in pressure drop gives an indication of the flooding in a distillation column
C Separation of components is not possible in liquid extraction, if selectivity is unity
D Dehydration of ethyl alcohol is most economically done by molecular distillation at very high
Correct Answer: Dehydration of ethyl alcohol is most economically done by molecular distillation at very high
Pick out the correct statement?
A Diffusivity decreases with increase in temperature
B Diffusivity increases with increase in molecular weight
C Diffusivity increases with the size of the individual molecule
D None of these
Correct Answer: None of these
With increase in pressure, the relative volatility for a binary system__________________?
A Increases
B Decreases
C Remains same
D Either A. or B., depends on the system
Correct Answer: Decreases
Which of the following adsorbent is used in the refining of sugar?
A Bone charcoal
B Wood charcoal
C Silica gel
D Activated clay
Correct Answer: Bone charcoal
Channelling in a packed tower results from the_____________________?
A High pressure drop
B Maldistribution of liquid
C Non-uniformity of packing
D Both B. and C.
Correct Answer: Both B. and C.
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