Enriched uranium is one in which

A Percentage of U<sub>235</sub> has been artificially increased
B Percentage of U has been artificially increased
C Percentage of U<sub>234</sub> has been artificially increased
D Extra energy is pumped from outside

Correct Answer: Percentage of U<sub>235</sub> has been artificially increased

Enriched uranium is a type of uranium in which the percent composition of uranium-235 has been increased through the process of isotope separation. Natural uranium is 99.284% U238 isotope, with U235 only constituting about 0.711% of its mass.
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#Mechanical Engineering #Power Plant Engineering

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ইরানের কোন পারমাণবিক প্লান্টকে প্রথম পারমাণবিক অস্ত্র উপযোগী Highly Enriched Uranium প্রস্তুতির জন্য সন্দেহ করা হয়?
A নাতাঞ্জ পারমাণবিক প্লান্ট
B ইসফাহান পারমাণবিক প্লান্ট
C আরাক পারমাণবিক প্লান্ট
D তেহরান পারমাণবিক প্লান্ট
Enriched uranium is required as a fuel in a nuclear reactor, if light water is used as moderator and coolant, because light water has
A High neutron absorption cross-section
B Low moderating efficiency
C High neutron scatter cross-section
D Low neutron absorption cross-section
Enriched uranium may contain fissionable contents of the order of
A 1-99%
B 1-25%
C 1-50%
D 1-75%
Enriched uranium means that, it contains
A > 0.71% of U-235
B only fertile material
C only fissile material
D no impurities
Enrichment of uranium is done to increase the concentration of __________ in the natural uranium.
A U-235
B U-233
C U-238
D PU-239
Nuclear fuel generally used in reactors is uranium oxide instead of uranium, because the former has higher
A Melting point, hence can be subjected to higher temperature
B Density ; hence core volume for a given power output would be smaller
C Resistance to effects of irradiation
D All of the above
In the gaseous diffusion process of uranium enrichment, the natural uranium is converted into gaseous
A Uranium oxide
B Uranium hexaflouride
C Uranium carbide
D Uranium sulphate
Percentage of natural uranium present in uranium ore found in Jadugoda (Jharkhand) is
A 0.1
B 1
C 3
D 12
A. he can only renew himself if his soul B. he renews himself and C. the writer can only be fertile if D. is constantly enriched by fresh experience
A BACD
B BDCA
C CADB
D CBAD
Where reactor operation is designed with fast neutrons such as in reactors using highly enriched fuel, the moderator used is
A Heavy water
B Graphite
C Carbon dioxide
D No moderator is needed

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