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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

Hydraulic mean depth (Dm) for a circular pipe of diameter ‘D’ flowing full is 0.25 D. For a circular channel, at Dm = 0.3 D, gives the condition for the maximum ?
A Flow rate
B Mean velocity
C Both ‘a’ & ‘b’
D Neither ‘a’ nor ‘b’
Correct Answer: Mean velocity
Capillary rise of mercury in a small diameter tube is proportional to (where, d = diameter of the tube, ζ = surface tension of mercury)____________________?
A d
B 1/d
C ζ
D 1/ζ
Correct Answer: ζ
Shear stress in a fluid flowing in a round pipe_________________?
A Varies parabolically across the cross-section
B Remains constant over the cross-section
C Is zero at the centre and varies linearly with the radius
D Is zero at the wall and increases linearly to the centre
Correct Answer: Is zero at the centre and varies linearly with the radius
Bed pressure drop in an air fluidised bed of catalyst particles (ρp = 200 kg/m3, Dp = 0.05 cm) of 60 cm bed depth and bed porosity of 0.5 expressed in cm of water (manometer) is________________?
A 90
B 60
C 45
D 30
Correct Answer: 60
For the transfer of solution of thick slurry, the pump used is a _____________ pump?
A Reciprocating
B Gear
C Diaphragm
D Centrifugal
Correct Answer: Diaphragm
In fluid flow, cavitation is caused, if the____________________?
A Fluid velocity decreases to zero
B Total energy decreases
C Both A. and B.
D Flow pressure approaches its vapor pressure at the prevailing temperature
Correct Answer: Flow pressure approaches its vapor pressure at the prevailing temperature
Cavitation can be prevented by________________?
A Suitably designing the pump
B Maintaining the suction head sufficiently greater than the vapour pressure
C Maintaining suction head = developed head
D Maintaining suction head lower than the vapour pressure
Correct Answer: Maintaining the suction head sufficiently greater than the vapour pressure
Sewage sludge is ______________ type of non-Newtonian fluid?
A Dilatant
B Bingham plastic
C Pseudo plastic
D None of these
Correct Answer: Bingham plastic
At high Reynolds number_________________?
A Inertial forces control and viscous forces are unimportant
B Viscous forces predominate
C Inertial forces are unimportant and viscous forces control
D None of these
Correct Answer: Inertial forces control and viscous forces are unimportant
Check valve provided in the discharge line of a centrifugal pump serves the purpose of controlling the_______________?
A Back flow of fluid in the event of stoppage of pump
B Discharge pressure
C Flow of liquid during operation of the pump
D All A., B. and C.
Correct Answer: Back flow of fluid in the event of stoppage of pump
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