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Mechanical Engineering Objective Questions { Nuclear-Power-Plants }

8. The most commonly used moderator in nuclear plants is
A.Heavy water
C.Graphite and concrete
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9. The efficiency of a nuclear power plant in comparison to a conventional thermal power plant is
D.May be less or more depending on size
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10. The mass number of a substance represents the sum of total number of
A.Protons and neutrons in an atom
B.Protons and electrons in an atom
C.Neutrons and electrons in an atom
D.Protons and neutrons in a nucleus
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11. A nuclear unit becoming critical means
A.It is generating power to rated capacity
B.It is capable of generating much more than rated capacity
C.There is danger of nuclear spread
D.Chain reaction that causes automatic splitting of the fuel nuclei has been established
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12. One gram of uranium will produce energy equivalent to approximately
A.1 tonne of high grade coal
B.4.5 tonnes of high grade coal
C.10 tonnes of high grade coal
D.100 tonnes of high grade coal
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13. In triggering fission, which type of neutrons are more effective
C.In bulk
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14. Reactors designed for propulsion applications are designed for
A.Natural uranium
B.Enriched uranium
C.Pure uranium
D.Any type of uranium
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