M C Q s D r i v e

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.

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
The inside heat transfer co-efficient in case of turbulent flow of liquid in the tube side in a 1-2 shell and tube heat exchanger is increased by ______________ times, when the number of tube passes is increased to 8?
A 20.8
B 40.8
C 40.4
D 20.4
Correct Answer: 40.8
In regenerative air preheater (as practised in heating of coke ovens), the heat is transferred_________________?
A Through a metallic wall
B By direct contact of hot flue gas with air
C By heating an intermediate material (like chequor bricks) and then heating the air from this
D None of these
Correct Answer: By heating an intermediate material (like chequor bricks) and then heating the air from this
A multiple effect evaporator has a capacity to process 4000 kg of solid caustic soda per day, when it is concentrating from 10% to 25% solids. The water evaporated in kg per day is__________________?
A 6000
B 24000
C 60000
D 48000
Correct Answer: 24000
The Nusselt number for fully developed (both thermally and hydrodynamically) laminar flow through a circular pipe whose surface temperature remains constant is______________?
A 1.66
B 88.66
C 3.66
D Dependent on NRe only
Correct Answer: 3.66
Which characteristic of a fluid is not important in deciding its route in a shell and tube heat exchanger ?
A Corrosiveness
B Fouling characteristic
C Viscosity
D None of these
Correct Answer: None of these