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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 value of Stefan-Boltzmann constant in SI unit is_________________?
A 5.6697 × 10-8W/m2.°K4
B 0.1714 × 10-8W/m2.°K4
C 5.6697 × 10-8kcal/m2. °K4
D 0.1714 × 10-8kcal/m2. °K4
Correct Answer: 5.6697 × 10-8W/m2.°K4
A metal wire of 0.01 m dia and thermal conductivity 200 W/m.K is exposed to a fluid stream with a convective heat transfer coefficient of 100 W/m2.K. The Biot number is ______________?
A 5.6
B 0.025
C 3.5
D 0.0035
Correct Answer: 0.025
Air is best heated with steam in a heat exchanger of__________________?
A Plate type
B Double pipe type with fin on steam side
C Double pipe type with fin on air side
D Shell and tube type
Correct Answer: Double pipe type with fin on air side
Which is the most suitable for the concentration of foamy & frothy liquors ?
A Agitated film evaporator
B Long tube vertical evaporator
C Open pan evaporator
D None of these
Correct Answer: Long tube vertical evaporator
The thermal radiative flux from a surface of emissivity = 0.4 is 22.68 kW/m2. The approximate surface temperature (K) is (Stefan-Boltzmann constant = 5.67 × 10-8 W/m2.K4) ?
A 1000
B 727
C 800
D 1200
Correct Answer: 1000
Boiling point elevation of an ideal solution_______________?
A Increases rapidly with temperature rise
B Decreases rapidly with temperature rise
C In independent of pressure
D Both B. and C.
Correct Answer: Increases rapidly with temperature rise
The main function of baffles provided in a shell and tube heat exchanger is to______________?
A Facilitate the cleaning of outer tube surface
B Enhance turbulence
C Hold the tubes in position
D All A , B & C
Correct Answer: Enhance turbulence
Steam side heat transfer co-efficient in an evaporator is in the range of ______________ kcal/hr.m2°C?
A 10-50
B 100-500
C 1000-1500
D 5000-15000
Correct Answer: 5000-15000
The ratio of total radiating power to the absorptivity of the body depends upon the _____________ as per Kirchoff‟s law?
A Wavelength of radiation
B Nature of the body
C Temperature of the body
D None of these
Correct Answer: Temperature of the body
For small temperature difference, the heat transfer rate as per Newton’s law of cooling is proportional to (where, Δt = excess temperature) ?
A Δt
B Δt2
C Δt3
D √(Δt)
Correct Answer: Δt
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