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.Management Sciences
Category: Nuclear Power Engineering
Which of the following radiations is the least penetrating ?
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A. α-rays
B. β-rays
C. γ-rays
D. X-rays
The most commonly used nuclear fuel in boiling water reactor is___________________?
A. Enriched uranium
B. Natural uranium
C. Plutonium
D. Monazite sand
Emission of β-particles during radioactive decay of a substance is from__________________?
A. Innermost shell
B. Nucleus
C. Outermost shell
D. None of these
____________ moderator is used in a fast breeder reactor?
A. Graphite
B. Heavy water
C. Beryllium
D. No
Which of the following nuclear reactors is the most efficient thermodynamically while operating between the same temperature and pressure limits of the reactor ?
A. Molten sodium cooled
B. CO2 gas cooled
C. Pressurised water
D. Boiling water
Which of the following undergoes fission reaction easily ?
A. U-235
B. U-238
C. Th-232
D. None of these
Which of the following isotopes is not present in natural uranium?
A. U-238
B. U-234
C. U-235
D. U-232
Atoms with same number of neutrons, but different number of nucleons are called___________________?
A. Isotones
B. Isobars
C. Isotopes
D. Isostere
The half life period of a radioactive element depends on its _______________________?
A. Temperature
B. Pressure
C. Amount
D. None of these
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
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