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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

The expression, ln(F/W) = ∫xF xW [dx/y* – x)] is_____________________?
A Differential distillation equation
B For NtoG in absorption for dilute mixture
C Slope of q-line in McCabe-Thiele method
D For relative volatility
Correct Answer: Differential distillation equation
Make up water is required in a cooling tower to replace the water lost by___________________?
A Evaporation
B Drift
C Blowdown and leakage
D All A., B. and C.
Correct Answer: All A., B. and C.
In a packed tower, the value of HETP equals HTUOG, when the equilibrium and the operating lines are (where, HETP = height equivalent to a theoretical plate HTUOG = overall gas phase height of a transfer unit) ?
A Straight
B Parallel
C Both A. & B.
D Neither A. nor B.
Correct Answer: Both A. & B.
In case of a desorber (stripper), the________________?
A Operating line always lies above the equilibrium curve
B Operating line always lies below the equilibrium curve
C Temperature remains unaffected
D Temperature always increases
Correct Answer: Operating line always lies below the equilibrium curve
Desirable value of absorption factor in an absorber is___________________?
A 1
B < 1
C > 1
D 0.5
Correct Answer: 1
Leaching of coffee from coffee beans is done by___________________?
A Hot water
B Hexane
C Lime water
D Dilute H2SO4 (hot)
Correct Answer: Hot water
If the solubilities of different components (in a liquid-liquid extraction system) increase with rise in temperature, then the temperature above which they dissolve completely is known as the critical solution temperature (CST or consolute temperature). If solubilities increase with decrease in temperature, then CST is the temperature below which they dissolve completely. If a binary system has no critical solution temperature, it implies that___________________?
A The system comprises of partially miscible liquids
B The system comprises of miscible liquids
C The system comprises of an azeotrope
D On heating, a vapor phase will appear; while on cooling, a solid phase will appear
Correct Answer: On heating, a vapor phase will appear; while on cooling, a solid phase will appear
______________ column is preferred to be used, when a high liquid hold up is required in a reactor for gas-liquid reaction ?
A Packed
B Bubble
C Spray
D Tray
Correct Answer: Bubble
During bottling of cold drinks (e.g. Pepsi), the main resistance to mass transfer for the absorption of carbon dioxide in water lies in the___________________?
A Gas film
B Liquid film
C Liquid-gas interface
D None of these
Correct Answer: Liquid film
In the absorption of ammonia in water, the main resistance to absorption is by the _________________ phase?
A Liquid
B Gas
C Both A. & B.
D Neither A. nor B.
Correct Answer: Gas
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