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Nuclear Power Engineering

Nuclear Power Engineering
The mass number of an element is not changed, when it emits __________ radiations.

α & β
γ & α
α, β, & γ
β & γ

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Nuclear Power Engineering
An element having large number of __________ is most easily subjected to nuclear fission.

Nucleons
Neutrons
Electrons
Protons

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Nuclear Power Engineering
The size of an atom is of the order of one

°Angstrom
Fermi
Micron
Mm

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

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

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Nuclear Power Engineering
The mass number of an element is equal to the number of __________ in the nucleus.

Electrons
Neutrons plus protons (i.e., nucleons)
Protons
Neutrons

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Nuclear Power Engineering
The amount of a radioisotope remaining undecayed after a time equal to four times its half life, will be __________ percent.

25
6.25
12.5
3.125

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