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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

Fouling factor must be included in the calculation of overall design heat transfer coefficient, when the liquid__________________?
A Containing suspended solids flows at low velocity
B Containing suspended solids flows at high velocity
C Is highly viscous
D Is of high specific gravity
Correct Answer: Containing suspended solids flows at low velocity
Overall tray efficiency of a distillation column is the ratio of the number of ___________________?
A Overall gas transfer units to the number of ideal trays required
B Ideal trays required to the number of real trays required
C Real trays required to the number of ideal trays required
D None of these
Correct Answer: Ideal trays required to the number of real trays required
An increase in the liquid resistance to interphase mass transfer and a resultant reduction in plate efficiency is caused by______________?
A An increase in liquid viscosity
B An increase in relative volatility for rectification columns
C Decrease in gas solubility for absorbers
D All A., B. and C.
Correct Answer: All A., B. and C.
Vertical condenser is advantageous to the horizontal condenser from operation point of view, when________________?
A Hydrostatic head is required for refluxing the condensate
B Only the function of condensation is to be carried out
C Sub-cooling of condensate is desired
D Both the functions of condensation & sub cooling are carried out in a single unit
Correct Answer: Both the functions of condensation & sub cooling are carried out in a single unit
The circumferential (hoop) stress in a thin walled cylindrical vessel under internal pressure is______________________?
A pd/2t
B pd/4t
C pd/t
D pd/3t
Correct Answer: pd/2t
Pick out the correct statement___________________?
A Centre to centre distance between two consecutives rivets in a row is called the pitch
B A riveted joint made in overlapping plates is called butt joint
C Hole size drilled in riveted plates is less than the actual size of the rivet
D None of these
Correct Answer: Centre to centre distance between two consecutives rivets in a row is called the pitch
n the agitators, the power required will be changed with the increase of diameter of agitator D. as ____________________?
A
B D5
C D
D D9
Correct Answer: D5
Pressure drop per tray in the atmospheric distillation column is about ________________ psi?
A 0.01 – 0.5
B 0.07 – 0.12
C 0.5 – 1.0
D 1 – 3
Correct Answer: 0.07 – 0.12
In a thin cylindrical shell, the hoop stress is ________________ stress?
A Radial
B Circumferential tensile
C Compressive
D Longitudinal
Correct Answer: Circumferential tensile
The maximum liquid gradient over a tray must not exceed__________________?
A 0.5″ -1.25″
B 2″-3.5″
C 5″
D Half the tray spacing
Correct Answer: 0.5″ -1.25″
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