Chemical Engineering MCQs

Page No. 808

Nuclear fission of one atom of uranium-235 produces the energy equivalent to about ____________ MeV?


a20


b200


c500


d2000


View Answer 200

On being hit with a hammer, ___________________ will readily fracture?


aBrass


bMild steel


cCast iron


dLead


View Answer Cast iron

The usual energy consumption in electric arc furnace steel making is _____________ KWh/ton of steel ?


a60 – 100


b400 – 700


c1200 -1500


d2000 – 2300


View Answer 400 – 700

Which of the following does not have a sharp melting point ?


aThoria


bGlass


cIce


dPig iron


View Answer Glass

Recrystallisation temperature of steel is ______________________ °C?


a50


b300


c500


d800


View Answer 800

Absolute zero pressure can be attained at a temperature of___________________?


a0°C


b50°K


c0°R


dNone of these


View Answer 0°R

Corrosion of metals cannot be prevented by its__________________?


aTempering


bChromising


cAluminising


dAlloying


View Answer Tempering

Other parameters remaining same, the recrystallisation temperature of an alloy is lowered, when_________________?


aStrain rate is increased


bGrain size is increased


cPrior cold deformation is increased


dNot affected by any of the above parameters



Which of the following rays has the least wavelength ?


aUltraviolet rays


bInfrared rays


cCosmic rays


dX-rays


View Answer Cosmic rays

Which of the following is not a principal alloying element for the structural steel ?


aMolybdenum


bNickel


cManganese


dChromium


View Answer Molybdenum

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