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Power Plant Engineering

Power Plant Engineering
The energy required to be applied to a radioactive nucleus for the emission of a neutron is

4.3 MeV
7.8 MeV
2.4 MeV
1 MeV

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Power Plant Engineering
Effective moderators are those materials which contain

Zero weight atoms
Critical atoms
Light weight atoms
Heavy weight atoms

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Power Plant Engineering
Plutonium is produced

Artificially
As basic raw material
By neutron irradiation of thorium
By neutron irradiation of Uz

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Power Plant Engineering
The secondary fuel used in nuclear power plants is

U₂₃₅ and Pu₂₃₈
U₂₃₃ and Pu₂₃₈
U₂₃₃ and Pu₂₃₉
U₂₃₅ and Th₂₃₂

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Power Plant Engineering
Where reactor operation is designed with fast neutrons such as in reactors using highly enriched fuel, the moderator used is

Carbon dioxide
No moderator is needed
Heavy water
Graphite

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Power Plant Engineering
U238 will undergo fission by

Either fast or slow neutrons
Low energy(slow) neutrons alone
Medium energy neutrons
High energy(fast) neutrons alone

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