Percentage of heavy water in ordinary water is around__________________?
Percentage of heavy water in ordinary water is around__________________?
A. 0.015
B. 7.54
C. 0.71
D. 32.97
Nuclear Power Engineering
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Ordinary water is not used as a moderator because, it___________________?
Ordinary water is not used as a moderator because, it___________________?A. Has a low absorption cross-section
B. Has a low scattering cross-section
C. Absorbs neutrons
D. Does not absorb neutrons -
First experimental observation of nuclear fission was done by ____________________?
First experimental observation of nuclear fission was done by ____________________?A. Plane
B. Rutherford
C. Fermi
D. Hahn and Strassmann -
The phenomenon of radioactivity was discovered by___________________?
The phenomenon of radioactivity was discovered by___________________?A. Madam Curie
B. Becquerel
C. Roentgen
D. J.J. Thomson -
Thermal nuclear reactors using enriched uranium as fuel contains a maximum of ____________ percent fissile material i.e. U-235?
Thermal nuclear reactors using enriched uranium as fuel contains a maximum of ____________ percent fissile material i.e. U-235?A. 1
B. 2
C. 3
D. 7 -
In β-decay of radioactive material, the ratio of neutron to proton____________________?
In β-decay of radioactive material, the ratio of neutron to proton____________________?A. Increases
B. Remain same
C. Decreases
D. Is unpredictable; may increase or decrease -
The largest stable nucleus is ________________?
The largest stable nucleus is ________________?A. U-235
B. U-238
C. Pb-206
D. Bi-209 -
The disintegration rate of a radioactive element _______________?
The disintegration rate of a radioactive element _______________?A. Progressively increases
B. Progressively decreases
C. Remains constant throughout
D. May increase or decrease depending on the material -
The phenomenon of nuclear fission is opposite to that of__________________?
The phenomenon of nuclear fission is opposite to that of__________________?A. Radioactive decay
B. Thermionic emission
C. Nuclear fusion
D. Combustion -
The most commonly used nuclear fuel in boiling water reactor is___________________?
The most commonly used nuclear fuel in boiling water reactor is___________________?A. Enriched uranium
B. Natural uranium
C. Plutonium
D. Monazite sand