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

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dNot affected by any of the above parameters

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Which of the following rays has the least wavelength ?


aUltraviolet rays

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bInfrared rays

✖


cCosmic rays

✓


dX-rays

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View Answer Cosmic rays

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


aMolybdenum

✓


bNickel

✖


cManganese

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dChromium

✖


View Answer Molybdenum

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