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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 Graetz number is concerned with the___________________
A Mass transfer between a gas and a liquid
B Absorption with chemical reaction
C Heat transfer in turbulent flow
D Heat transfer in laminar flow
Correct Answer: Heat transfer in laminar flow
The unit of conductance in SI unit is_______________?
A W/m
B W/m2
C W/°K
D W/m°K
Correct Answer: W/°K
Which of the following has the lowest Prandtl number ?
A Molten sodium (a coolant used in fast breeder reactor)
B Water
C Transformer oil
D Dilute H2SO4
Correct Answer: Molten sodium (a coolant used in fast breeder reactor)
In case of a multipass shell and tube heat exchanger, the temperature drop in the fluid _______________?
A Is inversely proportional to the resistance across which the drop occurs
B And the wall are proportional to individual resistances
C And the wall is not related
D None of these
Correct Answer: And the wall are proportional to individual resistances
The capacity of double-effect evaporator is less than half of the capacity of two single effects, each of which is operating over same terminal temperature difference, when the________________ ?
A Solution has an elevation of boiling point
B Evaporators operate under vacuum
C Evaporators operate at atmospheric pressure
D None of these
Correct Answer: Solution has an elevation of boiling point
Nusselt number is a function of Prandtl number and ______________ number of fluid in natural convection heat transfer?
A Grashoff
B Biot
C Stanton
D Reynolds
Correct Answer: Grashoff
Radiation energy is emitted by all the substances, which are above____________________?
A 0°K
B 0°C
C 100°C
D Room temperature
Correct Answer: 0°K
The dimensionless group in mass transfer that is equivalent to Prandtl number in heat transfer is_________________?
A Nusselt number
B Sherwood number
C Schmidt number
D Stanton number
Correct Answer: Schmidt number
Loss of heat from untagged steam pipe to the ambient air is by __________________?
A Conduction
B Convection
C Radiation
D All A., B. & C.
Correct Answer: All A., B. & C.
In Biot number, the characteristic length used is the ratio of the _______________ of the solid?
A Volume to surface area
B Perimeter to surface area
C Surface area to volume
D Surface area to perimeter
Correct Answer: Volume to surface area
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