1000+ Power Plant Engineering Multiple Choice Question Answer [Solved]

1. Which of the following is the primary fuel?
A. U???
B. U
C. U???
D. Pu
Answer : B

2. The size of the reactor is said to be critical when
A. Chain reaction can be initiated
B. It becomes uncontrollable
C. It explodes
D. It produces no power
Answer : A

3. Which of the following can be used as a coolant in nuclear plant?
A. Light or heavy water
B. Molten lead
C. Carbon dioxide
D. Freon
Answer : A

4. The most commonly used moderator in nuclear plants is
A. Heavy water
B. Concrete and bricks
C. Graphite and concrete
D. Graphite
Answer : D

5. A fast breeder reactor uses
A. 90% U???
B. U???
C. U???
D. Pu???
Answer : A

6. A boiling water reactor uses following as fuel
A. Enriched uranium
B. Plutonium
C. Thorium
D. U
Answer : A

7. Atomic number of an element in the periodic table represents the numbers of
A. Protons in the nucleus
B. Electrons in the nucleus
C. Neutrons in the nucleus
D. Electrons in the atom
Answer : A

8. In a fission process, maximum percentage of energy is released as
A. Kinetic energy of neutrons
B. Kinetic energy of fission products
C. Instantaneous release of gamma rays
D. Gradual radioactive decay of fission products
Answer : B

9. 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
Answer : B

10. The fuel needed, with reflector in nuclear power plant, in order to generate sufficient neutrons to sustain a chain reaction, would be
A. More
B. Less
C. Same
D. Zero
Answer : B

11. Reactors designed for propulsion applications are designed for
A. Natural uranium
B. Enriched uranium
C. Pure uranium
D. Any type of uranium
Answer : B

12. The predominant isotope of the naturally occuring element is
A. U???
B. U???
C. Pu???
D. Pu???
Answer : B

13. For economical operation of a nuclear plant
A. Used fuel should be reprocessed
B. Moderator should be used
C. Coolant should be employed
D. Control rods should be used
Answer : A

14. Isotopes of same elements have
A. Same atomic number and different masses
B. Same chemical properties but different atomic numbers
C. Different masses and different atomic numbers
D. Different chemical properties and same atomic numbers
Answer : B

15. Plutonium (Pu???) is produced
A. Artificially
B. By fission of Th???
C. When U??? is irradiated by neutrons
D. As basic raw material
Answer : C

16. Enriched uranium may contain fissionable contents of the order of
A. 1-99 %
B. 1-25 %
C. 1-50 %
D. 1-75 %
Answer : A

17. Breeder reactor has a conversion ratio of
A. Unity
B. More than unity
C. Less than unity
D. Zero
Answer : B

18. Reactors for propulsion applications use
A. Natural uranium
B. Molten lead
C. Any form of uranium
D. Thorium
Answer : B

19. Which is not identical for an atom and an isotope?
A. Mass number
B. Atomic number
C. Chemical properties
D. Position in periodic table
Answer : A

20. Which of the following is more appropriate for a moderator? One which
A. Does not absorb neutrons
B. Absorbs neutrons
C. Accelerates neutrons
D. Eats up neutrons
Answer : A

21. A moderator generally used in nuclear power plants is
A. Graphite
B. Heavy water
C. Concrete
D. Graphite and concrete
Answer : D

22. The risk of radioactive hazard is greatest in the turbine with following reactor
A. Pressurised water
B. Boiling water
C. Gas cooled
D. Liquid metal cooled
Answer : B

23. The energy released during the fission of one atom of Uranium 235 in million electron volts is about
A. 100
B. 200
C. 300
D. 400
Answer : B

24. A moderator, in nuclear power plants, is a medium introduced into the fuel mass in order to
A. Slow down the speed of fast moving neutrons
B. Control the reaction
C. Reduce the temperature
D. Extracts heat from nuclear reaction
Answer : A

25. The breeding gain in case of thermal breeder reactor as compared to fast breeder reactor is
A. Same
B. Lower
C. Higher
D. Unity
Answer : B

26. U238 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
Answer : A

27. 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
Answer : B

28. A reactor capable of converting a ferrite material into fissile isotopes is called
A. Regenerative reactor
B. Fast breeder reactor
C. Breeder reactor
D. Boiling water reactor
Answer : A

29. Electron volt is the unit of
A. Atomic power
B. Energy
C. Voltage
D. Radio activity
Answer : B

30. The total energy released in fission of U is
A. 5 MeV
B. 10 MeV
C. 199 MeV
D. 168 MeV
Answer : C

31. A fast breeder reactor
A. Uses graphite rods as moderator
B. Has powerful moderator
C. Has no moderator
D. Uses ferrite material as moderator
Answer : C

32. A moderator
A. Absorbs neutrons
B. Does not absorb neutrons
C. Accelerates neutrons
D. None of these
Answer : B

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

34. 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
Answer : D

35. Ferrite material is
A. The most fissionable material
B. The basic fuel for nuclear paints
C. Basic raw material for nuclear plants
D. The material which absorbs neutrons and undergoes spontaneous changes leading to the formation of fissionable material
Answer : D

36. Amongst the following, the fissionable materials are
A. U??? and Pu???
B. U??? and Pu???
C. U??? and Pu???
D. U??? and Pu???
Answer : A

37. Reflector in nuclear plants is used to
A. Return the neutrons back into the core
B. Shield the radioactivity completely
C. Check pollution
D. Conserve energy
Answer : A

38. A nuclear fission produces energy of following order in MeV
A. 20
B. 200
C. 2000
D. 20,000
Answer : B

39. Plutonium (Pu239) is produced
A. Artificially
B. When U238 is irradiated by neutrons
C. By fission of Th232
D. As basic raw material
Answer : B

40. Plutonium is produced
A. As basic raw material
B. By neutron irradiation of Uz
C. By neutron irradiation of thorium
D. Artificially
Answer : B

41. The fast breeder reactor uses the following moderator
A. Demineralised water
B. Carbon dioxide
C. Heavy water
D. No moderator is used
Answer : D

42. The nuclear energy is measured as
A. MeV
B. Curie
C. Farads
D. MW
Answer : A

43. In fast breeder reactors
A. Any type of moderator can be used
B. Graphite is used as the moderator
C. Heavy water is used as the moderator
D. Moderator is dispensed with.
Answer : D

44. Artificial radioactive isotopes find application in
A. Power generation
B. Nucleonic devices
C. Nuclear fission
D. Medical field
Answer : D

45. Half life of a radioactive isotope corresponds to the time required for half of the following to decay
A. Electrons
B. Protons
C. Neutrons
D. Atom
Answer : D

46. Ideally the neutron flux in reactor should be
A. Maximum in centre and zero at side
B. Maximum at side and zero in canter
C. Uniform throughout
D. Zero throughout
Answer : C

47. The efficiency of a nuclear power plant in comparison to a conventional thermal power plant is
A. Same
B. More
C. Less
D. May be less or mote depending on size
Answer : C

48. The energy produced by a thermal reactor of same size as a breeder reactor is
A. Almost same
B. Slightly more
C. Slightly less
D. Much less
Answer : D

49. The unit of radioactivity is
A. Electron volt
B. Electron ampere
C. Curie
D. MV
Answer : C

50. In order to have constant chain reaction to produce a constant rate of heat output, the value of ratio of the number of neutrons in one generation to the number of neutrons in the immediately preceding generation must be
A. Greater than 1.0
B. Less than 1.0
C. Equal to zero
D. Equal to 1.0
Answer : D