Chemical Engineering MCQs

Page No. 263

Roof of a basic electric furnace is made of _____________ bricks?


aSuperduty fireclay


bSilica


cChromite


dNone of these


View Answer Silica

Outer combustion chamber of blast furnace stove is lined with _____________ bricks?


aFireclay


bSilica


cChrome magnesite


dZirconia


View Answer Fireclay

Magnesite refractories are used for the construction of those furnaces, which are________________?


aNot required to resist the corrosive action of basic slag


bNot subjected to fluctuation in temperature


cUsed for raising & maintaining high temperature


dBoth B. and C.


View Answer Both B. and C.

Test piece for determination of RUL of a refractory is heated in a/an____________________?


aOxidising atmosphere


bReducing atmosphere


cElectric furnace


dNeutral atmosphere


View Answer Electric furnace

Thermal diffusivity of a refractory brick is high, when its ____________ is high?


aDensity


bSpecific heat


cThermal conductivity


dNone of these


View Answer Thermal conductivity

Magnesite refractories are generally not used in the___________________?


aElectric furnace walls


bSteel melting furnace


cOpen hearth furnace


dBurning zone of cement kilns


View Answer Steel melting furnace

High porosity refractory bricks have _______________?


aPoor resistance to the penetration of molten slag, metal & flue gases


bPoor heat conductivity & low strength


cBetter thermal spalling resistance


dAll A., B. and C.


View Answer All A., B. and C.

Fireclay bricks are not used in the _________________?


aBeehive coke oven


bBy-product coke oven walls


cCombustion chamber of B.F. stoves


dCoke oven regenerators



Presence of MgO in alumino-silicate refractories _______________ its refractoriness?


aIncreases


bLowers


cDoes not affect


dEither A. or B.; depends on its quantity


View Answer Lowers

Chemically, mullite refractories is____________________?


a3Al2O3.2SiO2


bAl2O3


cZrSO4


dThO2


View Answer 3Al2O3.2SiO2

Goto Page No.

Page 263 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