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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

Arithmetic mean area can be used in heat transfer problem to calculate the heat flow by conduction through a cylinder which is ____________________?
A Thin walled having the value of Ao Ai/< 2
B Thick walled
C Having the value of Ao/Ai > 2
D Both B. and C.
Correct Answer: Thin walled having the value of Ao Ai/< 2
jH factor for heat transfer is not a function of the _______________ number?
A Reynolds
B Nusselt
C Grashoff
D Both B. & C.
Correct Answer: Both B. & C.
In a heat exchanger, one transfer unit means___________________?
A A section of the exchanger in which change in temperature of one stream equals the average
B The size of the exchanger in which heat transfer rate is 1 kcal/hr
C Both A. and B.
D None of these
Correct Answer: A section of the exchanger in which change in temperature of one stream equals the average
A 2-4 heat exchanger involves__________________?
A Only counter-flow of fluids
B Only parallel-flow of fluids
C Both counter and parallel-flow of the fluids
D Smaller pressure drop compared to 1-2 exchanger
Correct Answer: Both counter and parallel-flow of the fluids
In a shell and tube heat exchanger, the height of 25 percent cut baffles is equal to (where, D = inside diameter of shell) ?
A 0.25 D
B 0.50 D
C 0.75 D
D None of these
Correct Answer: 0.75 D
Latent heat absorbed by 1 lb of water at 212°F, when it is changed to steam at 212°F, may be around ______________ BTU?
A 180
B 970
C 3.97
D None of these
Correct Answer: 180
Baffle spacing ____________________?
A Is not the same as baffle pitch
B Should be less than one fifth the diameter of the shell
C Should be less than the inside diameter of the shell
D None of these
Correct Answer: Should be less than the inside diameter of the shell
The local surface conductance for laminar film condensation on vertical surface is (where, t = film thickness) _________________?
A ∝ t
B ∝ 1/t
C ∝ √t
D Independent of ‘t’
Correct Answer: ∝ 1/t
The purpose of floating head in a heat exchanger is to_________________?
A Avoid buckling of tubes
B Provide support for tubes
C Decrease the pressure drop
D Facilitate its lengthening, if needed
Correct Answer: Avoid buckling of tubes
Mechanical recompression evaporation is used in the production of____________________?
A Alcohol
B Distilled water
C Salt
D Fruits jam
Correct Answer: Distilled water
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