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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

Maximum heat transfer rate is obtained in ______________ flow?
A Laminar
B Turbulent
C Creeping
D Transition region
Correct Answer: Turbulent
Resistance to heat flow by conduction is proportional to (where, t & ρ are thickness & density of the material respectively and A = area normal to the direction of heat flow.) ?
A t
B 1/ρ
C 1/A
D All A., B. & C.
Correct Answer: All A., B. & C.
In a shell and tube heat exchanger, floating head is used for _________________?
A Large temperature differentials
B High heat transfer co-efficient
C Low pressure drop
D Less corrosion of tubes
Correct Answer: Large temperature differentials
Dittus-Boelter equation used for the determination of heat transfer co-efficient is valid ___________________?
A For fluids in laminar flow
B For fluids in turbulent flow
C When Grashoff number is very important
D For liquid metals
Correct Answer: For fluids in turbulent flow
With increase in temperature, the total emissivity of conductors____________________?
A Increases
B Decreases
C Remain same
D Decreases linearly
Correct Answer: Increases
A multiple effect evaporator as compared to a single effect evaporator of the same capacity has _________________?
A Lower heat transfer area
B Lower steam economy
C Higher steam economy
D Higher solute concentration in the product
Correct Answer: Higher steam economy
Electro-magnetic spectrum range, which is important for radiation varies from _____________ microns?
A 1 to 100
B 0.5 to 50
C 10 to 100
D 100 to 1000
Correct Answer: 0.5 to 50
In a gas-liquid shell and tube heat exchanger, the_________________?
A Presence of a non-condensable gas decreases the condensing film co-efficient
B Gases under high pressure are routed through the tube side, because high pressure gases are
C Gases to be heated/cooled is normally routed through the shell side, because the corrosion
D All A, B. & C.
Correct Answer: All A, B. & C.
In a shell and tube heat exchanger, square pitch compared to triangular pitch__________________?
A Gives a higher shell side pressure drop
B Gives a lower shell side pressure drop
C Can pack more surface area into a shell of given diameter
D None of these
Correct Answer: Gives a higher shell side pressure drop
Planck’s distribution law is valid for _____________ bodies?
A Black
B White
C Coloured
D All A., B. & C.
Correct Answer: Coloured
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