Chemical Engineering MCQs

Page No. 360

Fast breeder reactors are most usable in India, because of our largest _____________ deposits?


aThorium

✓


bPlutonium

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cUranium

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dNone of these

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View Answer Thorium

An electron has a mass that is approximately ____________ that of the proton?


a1836 (approximately)

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b1/1836 (approximately)

✓


c1

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d∞

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Which of the following reactors is operated at high neutron flux and low power level ?


aBreeder reactor

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bResearch reactor

✓


cHeterogeneous reactor

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dLiquid metal (e.g., molten sodium) cooled reactor

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View Answer Research reactor

Absorption/scattering cross-section of an element is expressed in “barn”, which is equivalent to___________________?


a10-24 cm2

✓


b10-12 cm

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c1 Angstrom

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d10-24 cm

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View Answer 10-24 cm2

Isotopes of an element have different_________________?


aMass number

✓


bElectronic configuration

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cNuclear charge

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dChemical properties

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View Answer Mass number

Thorium metal__________________?


aResembles steel in appearance

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bIs less hard (in the range of silver)

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cIs highly ductile

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dAll A., B. and C.

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View Answer All A., B. and C.

Which of the following isotopes is not present in natural uranium?


aU-238

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bU-234

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cU-235

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dU-232

✓


View Answer U-232

U-235 content in enriched uranium, that is normally used in power reactors (e.g., at Tarapur atomic power plant), is about _____________ percent?


a85

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b50

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c3

✓


d97

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View Answer 3

Thorium-232 is converted into uranium-233 in a/an ______________ nuclear reactor?


aThermal

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bFast breeder

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cHeavy water moderated

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dEnriched uranium

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View Answer Fast breeder

Nuclides having the same atomic numbers are termed as___________________?


aIsotopes

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bIsomers

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cIsotones

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dIsobars

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View Answer Isomers

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