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Nuclear Power Engineering

Nuclear Power Engineering
Enrichment of uranium is done to increase the concentration of __________ in the natural uranium.

U-233
U-238
U-235
Pu-239

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Nuclear Power Engineering
Heavy water used in the nuclear reactors to slow down the speed of neutrons is

Water having dissolved salts of heavy metals
A compound of oxygen and deuterium
Highly purified water
None of these

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Nuclear Power Engineering
Radioactive decay is a __________ change.

Chemical
Physical
None of these
Nuclear

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Nuclear Power Engineering
Gas cooling as compared to water cooling of nuclear reactors

Can not attain a high temperature
Is more efficient as gas has a higher specific heat
Can produce only saturated steam for feeding to power turbine
None of these

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Nuclear Power Engineering
__________ gas is normally not used as a coolant in a nuclear reactor, because of its high neutron capture cross-section.

Hydrogen
Carbon dioxide
Helium
Nitrogen

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Nuclear Power Engineering
Heat is generated in a nuclear reactor (thermal) by

Fission of U-235 by neutrons
Combustion of a nuclear fuel e.g. uranium
Fusion of atoms of uranium
Absorption of neutrons in uranium atoms

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