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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

A pipe has a porous section of length L as shown in the figure. Velocity at the start of this section of V0. If fluid leaks into the pipe through the porous section at a volumetric rate per unit area q(x/L)2, what will be axial velocity in the pipe at any „x‟? Assume incompressible one dimensional flow i.e., no gradients in the radial direction ?
A VX = V0 + q (x3/L2D)
B VX = V0 + ⅓q (x3/L2)
C VX = V0 + 2q (x2/LD)
D VX = V0 + (4/3) q (x3/L2D)
Correct Answer: VX = V0 + (4/3) q (x3/L2D)
Navier-Stokes equation is useful in the analysis of _____________ fluid flow problems?
A Non-viscous
B Viscous
C Turbulent
D Rotational
Correct Answer: Viscous
The head loss in turbulent flow in a pipe varies_________________?
A Directly as the velocity
B Inversely as the square of the velocity
C Approximately as the square of the velocity
D Inversely as the square of the diameter
Correct Answer: Approximately as the square of the velocity
Pressure difference between two points in vessels, pipelines or in two different pipelines can be measured by a differential manometer. The pressure difference measured as the mm of water column in case of mercury-water, differential manometer is equal to (where, H = difference in height of mercury column in mm)?
A H
B 12.6 H
C 13.6 H
D 14.6 H
Correct Answer: H
Which of the following produces maximum pressure difference for transportation of gases ?
A Vacuum pumps
B Blowers
C Fans
D Compressors
Correct Answer: Compressors
Bernoulli’s equation is dependent on the__________________?
A First law of thermodynamics
B Third law of thermodynamics
C Law of conservation of momentum
D None of these
Correct Answer: None of these
For the production of very high vacuum, a _____________ pump is normally used?
A Diffusion
B Centrifugal
C Jet ejector
D Piston
Correct Answer: Diffusion
Foot valve provided in the pump is a ______________ valve?
A Direction control
B Back pressure
C Relief
D Pressure reduction
Correct Answer: Back pressure
For water, when the pressure increases, the viscosity_________________?
A Also increases
B Decreases
C Remain constant
D First decreases, and then increases
Correct Answer: First decreases, and then increases
Air vessel provided in a reciprocating pump is for__________________?
A Increasing the acceleration head
B Making the friction in pipe uniform
C Decreasing the acceleration head
D None of these
Correct Answer: Making the friction in pipe uniform
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