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Nuclear Power Engineering

Nuclear Power Engineering
Mass of a positron is same as that of a/an

Electron
Proton
Neutron
α-particle

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Nuclear Power Engineering
75% of a radioactive element decays in 6 hours. Its half life period is __________ hours.

43894
43836
4
3

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Nuclear Power Engineering
Ordinary water is not used as a moderator because, it

Has a low scattering cross-section
Does not absorb neutrons
Has a low absorption cross-section
Absorbs neutrons

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Nuclear Power Engineering
Fast breeder reactors do not

Use fast neutrons for fission
Use Th-232 as fissile fuel
Use molten sodium as coolant
Convert fertile material to fissile material

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Nuclear Power Engineering
Critical mass is the minimum mass of nuclear fissile material required for the

Economic power generation
Power generation on commercial scale
None of these
Sustainment of chain reaction

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Nuclear Power Engineering
Heavy water has maximum density at __________ °C.

11.6
18.6
4

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