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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

For hot feed, forward feeding as compared to backward feeding results in ______________ economy?
A Increased
B Decreased
C No effect on
D None of these
Correct Answer: Increased
In sub-cooled boiling ?
A Temperature of the heating surface is less than the boiling point of the liquid
B Temperature of the heating surface is more than the boiling point of the liquid
C Bubbles from heating surface are absorbed by the mass of the liquid
D Very large vapour space is necessary
Correct Answer: Temperature of the heating surface is more than the boiling point of the liquid
Heat transfer by conduction results due to the transfer of free electrons, kinetic energy & vibrational energy from one molecule to another. Conduction heat transfer cannot take place____________________?
A Between two bodies in physical contact with each other
B Between two bodies not in physical contact with each other
C From one part of a body to the another part of the same body
D Both B & C
Correct Answer: Between two bodies not in physical contact with each other
The thickness of condensate layer in filmwise condensation depends on the__________________?
A Condensation rate
B Surface configuration
C Liquid flow rate from the surface
D All A., B. and C.
Correct Answer: All A., B. and C.
The heat transfer co-efficient in film type condensation is _______________ that for dropwise condensation?
A Greater than
B Lower than
C Is same as
D Half
Correct Answer: Lower than
Steam economy in case of a triple effect evaporator will be _________________?
A 1
B < 1
C > 1
D Between 0 and 1
Correct Answer: 1
In a forward feed multiple effect evaporator unit__________________?
A Viscosity of liquid is highest in first effect
B Transfer from effect to effect is done by pumps
C No pump is required to withdraw the product from the last effect
D None of these
Correct Answer: None of these
Dropwise condensation is promoted on a/an ______________ surface?
A Glazed
B Oily
C Coated
D Smooth
Correct Answer: Oily
Leidenfrost point is a term concerned with the____________________?
A Condensation of the saturated vapor on a cold surface
B Concentration of a corrosive solution by evaporation
C Heat transfer between two highly viscous liquids
D Boiling of a liquid on a hot surface
Correct Answer: Boiling of a liquid on a hot surface
Which of the following is not used as a medium for high temperature heating ?
A Dowtherm
B Mercury
C Liquid metal (e.g. molten sodium)
D Fused salts (e.g., an eutectic mixture of 53% KNO3, 40% NaNO2and 7% NaNO3)
Correct Answer: Mercury
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