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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 centrifugal pump is used to pump water through a horizontal distance of 150 m, and then raised to an overhead tank 10 m above. The pipe is smooth with an I.D of 50 mm. What head (m of water) must the pump generate at its exit E. to deliver water at a flow rate of 0.001 m3/s? The Fanning friction factor, f is 0.0062 ?
A 10 m
B 11 m
C 11.8 m
D 30 m
Correct Answer: 11 m
Air vessel of a reciprocating pump is initially filled with___________________?
A Atmospheric air
B Compressed air
C Water
D None of these
Correct Answer: Compressed air
Fluid flow through a packed bed is represented by the ______________ equation?
A Fanning’s
B Ergun’s
C Hagen-Poiseuille’s
D None of these
Correct Answer: Ergun’s
The location of centre of pressure, which defines the point of application of the total pressure force on the surface, can be calculated by applying the principle of moments according to which “sum of the moment of the resultant force about an axis is equal to the sum of the components about the same axis”. The centre of pressure of a rectangular surface (of width ‘w’) immersed vertically in a static mass of fluid is at a depth of (where, y = depth of the liquid) ?
A 1/(y/3)
B 2y/3
C 1/(y/4)
D 3y/4
Correct Answer: 2y/3
In a free vortex, the_____________________?
A Velocity changes linearly with radial distance
B Flow is necessarily rotational
C Radial component of velocity is same everywhere
D Stream lines are not circular
Correct Answer: Velocity changes linearly with radial distance
In continuous fluidisation_________________?
A Solids are completely entrained
B The pressure drop is less than that for batch fluidisation
C There is no entrainment of solids
D Velocity of the fluid is very small
Correct Answer: Solids are completely entrained
Drag co-efficient for flow past immersed body is the ratio of _____________ to the product of velocity head and density?
A Shear stress
B Shear force
C Average drag per unit projected area
D None of these
Correct Answer: Average drag per unit projected area
The boundary layer thickness at a given section along a flat plate _____________ with increasing Reynold’s number?
A Increases
B Decreases
C Remain same
D May increase or decrease
Correct Answer: Decreases
Transition length for a turbulent fluid entering into a pipe is around _____________ times the pipe diameter?
A 5
B 50
C 500
D 5000
Correct Answer: 5
Centrifugal pumps as compared to reciprocating pumps__________________?
A Run at a lower speed for the same discharge
B Do not need priming
C Deliver fluid with pulsating/fluctuating discharge
D Can be run with discharge line valve closed for a short interval
Correct Answer: Can be run with discharge line valve closed for a short interval
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