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.

The film thickness for laminar film condensation on vertical surface _____________ from top to bottom?
A Cumulatively increases
B Cumulatively decreases
C Remain constant
D And the surface conductance increase
Correct Answer: Cumulatively increases
_____________ paint has the minimum absorption co-efficient?
A Black
B White lead
C Grey
D Light cream
Correct Answer: White lead
For shell and tube heat exchanger, with increasing heat transfer area, the purchased cost per unit heat transfer area___________________?
A Increases
B Decreases
C Remain constant
D Passes through a maxima
Correct Answer: Passes through a maxima
Mode of heat transfer in which the fluid moves under the influence of changes in fluid pressure produced by external work is called_______________?
A Radiation
B Natural convection
C Forced convection
D Conduction
Correct Answer: Forced convection
Steam traps are provided in steam carrying pipelines to_________________?
A Condense steam
B Release excess steam pressure by bleeding steam
C Remove condensate and inert gases
D None of these
Correct Answer: Remove condensate and inert gases
Kirchoff‟s law applies to _____________ radiation?
A Total
B Monochromatic
C Both A. & B.
D Neither A. nor B.
Correct Answer: Both A. & B.
Log mean temperature difference (LMTD) cannot be used, if ___________________?
A Heat transfer co-efficient over the entire heat exchanger is not constant
B There exists an unsteady state
C The heat capacity is not constant and there is a phase change
D None of these
Correct Answer: None of these
In a parallel flow heat exchanger, if the outlet temperature of hot and cold fluids are the same, then the log mean temperature difference (LMTD) is_________________?
A Minimum
B Maximum
C Zero
D Infinity
Correct Answer: Zero
Bulk of the convective heat transfer resistance from a hot tube surface to the fluid flowing in it, is __________________?
A In the central core of the fluid
B Uniformly distributed throughout the fluid
C Mainly confined to a thin film of fluid near the surface
D None of these
Correct Answer: Mainly confined to a thin film of fluid near the surface
If Prandtl number is greater than the Schmidt number, then the____________________?
A Thermal boundary layer lies inside the concentration boundary layer
B Concentration boundary layer lies inside the thermal boundary layer
C Thermal & concentration boundary layers are of equal thickness
D Hydrodynamic (i.e., momentum) boundary layer is thicker than the other two
Correct Answer: Thermal boundary layer lies inside the concentration boundary layer