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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 wavelength at which the maximum monochromatic emissive power occurs for a black body, is (where, T = absolute temperature of the black body)?
A αT
B α × 1/T
C α T4
D Independent of T
Correct Answer: α × 1/T
The equivalent diameter for the annulus of a double pipe heat exchanger, whose inner pipe has fins on the outside is ______________ compared to the same size pipes without fins?
A More
B Less
C Same
D Unpredictable
Correct Answer: Less
A dilute aqueous solution is to be concentrated in an evaporator system. High pressure steam is available. Multiple effect evaporator system is employed, because__________________?
A Total heat transfer area of all the effects is -less than that in a single effect evaporator system
B Total amount of vapor produced per Kg of feed steam in a multiple effect system is much
C Boiling point elevation in a single effect system is much higher than that in any effect in a
D Heat transfer co-efficient in a single effect is much lower than that in any effect in a multieffect
Correct Answer: Total amount of vapor produced per Kg of feed steam in a multiple effect system is much
In a 1-1 concurrent heat exchanger, if the tube side fluid outlet temperature is equal to the shell side fluid outlet temperature, then the LMTD is_________________?
A ∞
B 0
C Equal to the difference between hot and cold fluids inlet temperature
D Equal to the difference between hot fluid inlet temperature and cold fluid outlet temperature
Correct Answer: 0
Grashoff number, which is defined as g . β (Ts – T∞) ρ2. L3/μ2, is proportional to the ratio of buoyancy force to ____________ force?
A Viscous
B Elastic
C Inertial
D None of these
Correct Answer: Viscous
If the thermal conductivity of a wall material is independent of temperature, the steady state temperature distribution in the very large thin plane wall having steady, uniform surface temperature follows ____________ law?
A Hyperbolic
B Parabolic
C Linear
D Logarithmic
Correct Answer: Linear
Viscous & heat sensitive liquids are concentrated in _____________ evaporators?
A Open pan
B Long tube
C Agitated film
D None of these
Correct Answer: Agitated film
In case of surface condensers, a straight line is obtained on plotting 1/U vs. ____________ on an ordinary graph paper?
A 1/V̅ -0.8
B V̅ -0.8
C V̅ -2
D 1/ V̅ -2
Correct Answer: 1/V̅ -0.8
Viscosity of gases ______________ with increase in temperature?
A Increase very rapidly
B Increase slowly
C Decrease slowly
D Remain unaffected
Correct Answer: Increase slowly
When does the heat generated by fluid friction becomes appreciable compared to the heat transferred between the fluids ?
A At high fluid velocity
B At low velocity
C When fluid flows past a smooth surface
D None of these
Correct Answer: At high fluid velocity
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