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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

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
Thermal diffusivity is the most important in heat transfer by__________________?
A Conduction
B Radiation
C Condensation
D Natural convection
Correct Answer: Conduction
LMTD correction factor which is to be applied for a cross-flow heat exchanger increases with increase in the number of shell passes. Its value for a single pass cross flow heat exchanger is __________________?
A 0
B 1
C > 1
D < 1
Correct Answer: 1
The statement that “maximum wavelength of radiation is inversely proportional to the temperature” is ______________ law?
A Stefan-Boltzmann’s
B Planck’s
C Wien’s displacement
D None of these
Correct Answer: Wien’s displacement
Among liquids, water has a comparatively high value of thermal conductivity, due to its__________________?
A Low density
B High viscosity
C Partial ionisation
D Dense structure
Correct Answer: Partial ionisation
In which mode of heat transfer, the Biot number is important ?
A Transient heat conduction
B Natural convection
C Forced convection
D Radiation
Correct Answer: Transient heat conduction
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