Chemical Engineering MCQs

Page No. 363

Uranium percentage in monazite sand is about________________?


a0.01


b0.25


c1.2


d7


View Answer 0.25

The main ore of thorium is_________________?


aPitchblende


bMonazite sand


cLimonite


dGalena


View Answer Monazite sand

Fuel for a fast breeder reactor is_________________?


aPlutonium


bUranium


cRadium


dNeptunium


View Answer Plutonium

Fast breeder reactors do not____________________?


aUse Th-232 as fissile fuel


bConvert fertile material to fissile material


cUse fast neutrons for fission


dUse molten sodium as coolant



Quantity of fissionable material (i.e. U-235) in natural uranium is _____________ percent?


a0.71


b6.31


c99.29


d12.73


View Answer 0.71

Extraction of uranium from its ore is done using ______________ methods?


aElectrometallurgical


bPyrometallurgical


cChemical


dPhysical beneficiation


View Answer Chemical

The velocity of thermal (slow) neutrons triggering nuclear fission reaction (having energy equal to 0.025 eV) is about ______________ metres/second?


a1100


b2200


c3300


d4400


View Answer 2200

Unit of radioactivity is__________________?


aBarn


bFermi


cAngstrom


dCurie


View Answer Curie

Gas cooling as compared to water cooling of nuclear reactors___________________?


aCannot attain a high temperature


bIs more efficient as gas has a higher specific heat


cCan produce only saturated steam for feeding to power turbine


dNone of these


View Answer None of these

Which of the following nuclear materials is fissile ?


aUranium-238


bThorium-232


cPlutonium-239


dNone of these


View Answer Plutonium-239

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