Chemical Engineering MCQs

Page No. 363

Uranium percentage in monazite sand is about________________?


a0.01

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b0.25

✓


c1.2

✖


d7

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View Answer 0.25

The main ore of thorium is_________________?


aPitchblende

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bMonazite sand

✓


cLimonite

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dGalena

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View Answer Monazite sand

Fuel for a fast breeder reactor is_________________?


aPlutonium

✓


bUranium

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cRadium

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dNeptunium

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View Answer Plutonium

Fast breeder reactors do not____________________?


aUse Th-232 as fissile fuel

✓


bConvert fertile material to fissile material

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cUse fast neutrons for fission

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dUse molten sodium as coolant

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


a0.71

✓


b6.31

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c99.29

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d12.73

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View Answer 0.71

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


aElectrometallurgical

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bPyrometallurgical

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cChemical

✓


dPhysical beneficiation

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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

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View Answer 2200

Unit of radioactivity is__________________?


aBarn

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bFermi

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cAngstrom

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dCurie

✓


View Answer Curie

Gas cooling as compared to water cooling of nuclear reactors___________________?


aCannot attain a high temperature

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bIs more efficient as gas has a higher specific heat

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cCan produce only saturated steam for feeding to power turbine

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dNone of these

✓


View Answer None of these

Which of the following nuclear materials is fissile ?


aUranium-238

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bThorium-232

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cPlutonium-239

✓


dNone of these

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View Answer Plutonium-239

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