Chemical Engineering MCQs

Page No. 229

Propellers are____________________?


aAxial flow mixers


bLow speed impeller


cUsed for mixing liquids of high viscosity


dRadial flow mixers


View Answer Axial flow mixers

Cavitation occurs in a centrifugal pump when the suction pressure is________________?


aLess than the vapour pressure of the liquid at that temperature


bGreater than the vapour pressure of the liquid at that temperature


cEqual to the vapour pressure


dEqual to the developed head



Erosion and pits formation on the impeller of a centrifugal pump may be due to________________?


aCavitation


bLow speed of impeller


cIts operation with delivery valve closed for considerable time after starting the pump


dOff centering of pump with motor


View Answer Cavitation

What is the ratio of total kinetic energy of fluid passing per second to the value obtained on the basis of average velocity (for laminar flow through a circular pipe) ?


a0.5


b1


c1.5


d2


View Answer 2

The curve of metacentre for a floating body ____________ the curve of buoyancy?


aIs always below


bIs the evolute of


cIntersects at right angle


dIs tangential to


View Answer Is the evolute of

Slugging occurs in a fluidised bed, if the bed is___________________?


aNarrow


bDeep


cBoth A. & B.


dNeither A. nor B.


View Answer Both A. & B.

Unsteady non-uniform flow is represented by flow through a/an_________________?


aLong pipe at constant rate


bLong pipe at decreasing rate


cExpanding tube at increasing rate


dExpanding tube at constant rate



In case of turbulent flow of a Newtonian fluid in a straight pipe, the maximum velocity is equal to (where, Vavg = average fluid velocity)?


aVavg


b1.2 Vavg


c1.5 Vavg


d1.8 Vavg


View Answer 1.2 Vavg

Which law is followed by the velocity distribution in the turbulent boundary layer ?


aParabolic law


bLinear law


cLogarithmic law


dNone of these


View Answer Logarithmic law

f = 16/NRe, is valid for__________________?


aTurbulent flow


bLaminar flow through an open channel


cSteady flow


dNone of these


View Answer None of these

Goto Page No.

Page 229 of 843

Alphabetical MCQs Categories

Here below You find all kind of categories of MCQs in alphabetical order.


"Comprehensive Collection of MCQs: Alphabetically Organized by Subject"

"Discover an extensive collection of multiple-choice questions (MCQs) neatly categorized by subject from A to Z. This resource is designed for anyone eager to explore various topics in a straightforward and organized manner. Whether you're a student preparing for exams, an educator seeking supplementary materials, or simply curious about different subjects, this compilation offers a convenient way to learn and assess your knowledge. With questions arranged alphabetically, navigation is effortless, allowing you to delve into subjects of interest at your own pace. Engage, learn, and expand your understanding with this accessible and comprehensive repository of MCQs!"


BolPakistan

bolpakistan.com.pk includes Job Mcqs and Pak Mcqs is the Top Largest Mcqs Forum in World, in which you can read Mcqs of All Subjects, PPSC test preparation, FPSC, NTS and PPSC PAST PAPERS, PPSC PAST MCQS. A Collection of Repeated MCQs for JOBs seekers.

Copyright © 2024, Designed & Developed by BolPakistan