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Mechanical Engineering Objective Questions { Nuclear Power Plants }



15. A nuclear fission produces energy of following order in MeV
A.20
B.200
C.2000
D.20000

16. Moderator in nuclear plants is used to
A.Reduce temperature
B.Extract heat from nuclear reaction
C.Control the reaction
D.Cause collision with the fast moving neutrons to reduce their speed

17. The main interest of shielding in nuclear reactor is protection against
A.X-rays
B.Infra-red rays
C.?, ?, and ? rays
D.Neutrons and gamma rays

18. U235 will undergo fission by
A.High energy (fast) neutrons alone
B.Low energy (slow) neutrons alone
C.Either fast or slow neutrons
D.Medium energy neutrons

19. Electron-volt is the unit of
A.Atomic power
B.Energy
C.Voltage
D.Radio activity

20. Superheated steam is generated in following reactor
A.Boiling water
B.Gas cooled
C.Pressurised water
D.All of the above

21. A nuclear fission is initiated when the critical energy as compared to neutron binding energy of the atoms is
A.Same
B.More
C.Less
D.There is no such criterion

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