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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

Diameter of raschig rings used in packed tower in industry is normally around _____________________ inches?
A 2
B 8
C 12
D 18
Correct Answer: 2
In rectifying section of a continuous distillation column, the____________________?
A Vapour is enriched with low boilers
B Vapour is enriched with high boilers
C Liquid is stripped of high boilers
D None of these
Correct Answer: Vapour is enriched with high boilers
The reason for preferring packed towers over plate towers in distillation practice is that the packed tower operation gives___________________?
A Low pressure drop and high hold up
B High pressure drop and low hold up
C Low pressure drop and low hold up
D High pressure drop and high hold up
Correct Answer: Low pressure drop and low hold up
In Azeotropic mixture, the equilibrium vapour composition is____________________?
A More than liquid composition
B Less than liquid composition
C Same as liquid composition
D Independent of pressure
Correct Answer: Same as liquid composition
Which of the following has the same dimension as mass diffusivity ?
A Momentum flux
B Kinematic viscosity
C Thermal diffusivity
D Both B. and C.
Correct Answer: Both B. and C.
Which of the following decreases during evaporative cooling process with recirculated water supply ?
A Wet bulb temperature
B Relative humidity
C Partial pressure of vapour
D None of these
Correct Answer: None of these
At what percentage (by volume) of alcohol composition, it forms an azeotrope with water ?
A 90
B 91.5
C 95
D 99
Correct Answer: 95
It takes 6 hours to dry a wet solid from 50% moisture content to the critical moisture content of 15%. How much longer it will take to dry the solid to 10% moisture content, under the same drying conditions? (The equilibrium moisture content of the solid is 5%) ?
A 15 min
B 51 min
C 71 min
D 94 min
Correct Answer: 71 min
Steam distillation is not recommended to be used, if the _____________________?
A Azeotropic mixture is to be separated and the final product is miscible with water
B Liquids decompose, if distilled directly at atmospheric pressure
C Material cannot be distilled by indirect heating even under low pressure, because of the high
D Material to be distilled is thermally unstable or has the tendency to react with other
Correct Answer: Azeotropic mixture is to be separated and the final product is miscible with water
Which of the following is considered equivalent to one theoretical stage in Mc-Cabe Thiele’s method ?
A Partial condenser
B Total condenser
C Reboiler
D Both B. and C
Correct Answer: Both B. and C
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