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