Chemical Engineering MCQs

Page No. 585

Actual operating speed of a ball mill may vary from 65 to 80% of the critical speed. Which of the following duties would require the ball mill to be operated at maximum percentage of critical speed ?


aWet grinding in low viscous suspension

✖


bWet grinding in high viscous suspension

✖


cDry grinding of large particles (upto 1.25 cms)

✖


dDry grinding of large particles in un-baffed mills

✓



A tube mill compared to a ball mill__________________?


aHas a higher length/diameter ratio

✓


bProduces a coarser product

✖


cHas a higher diameter/length ratio

✖


dUses much larger balls

✖



Grizzlies are used for separating _____________ solids?


aCoarse

✖


bFine

✓


cAny size

✖


dNone of these

✖


View Answer Fine

In closed circuit grinding as compared to open circuit grinding, the_________________?


aSpecific surface of product is more

✖


bProduct has lesser size uniformity

✖


cProduction rate at a given limiting size is lower

✖


dOperation is economical

✓



In bag filters, filter fabrics are never made of__________________?


aMetallic wire woven mesh

✓


bPolyester fibres

✖


cCotton fibres

✖


dNylon fibres

✖



For crushing of solids, the Rittinger’s law states that the work required for crushing is proportional to __________________?


aThe new surface created

✓


bThe size reduction ratio

✖


cThe change in volume due to crushing

✖


dNone of these

✖



Which of the following screens has the maximum capacity ?


aGrizzlies

✖


bTrommels

✖


cShaking screen

✖


dVibrating screen

✓


View Answer Vibrating screen

For spheres, volume shape factor is given by____________________?


aπ = (A/D2)

✖


b2π = (2A/D2)

✖


cπ/6 = (V/D3)

✓


dAD/V

✖


View Answer π/6 = (V/D3)

The inlet pressure in a constant rate filtration____________________?


aIncreases continuously

✓


bDecreases gradually

✖


cRemains constant

✖


dNone of these

✖



Trommels separate a mixture of particles depending on their_____________________?


aSize

✓


bDensity

✖


cWettability

✖


dElectrical & magnetic properties

✖


View Answer Size

Goto Page No.

Page 585 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