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

1. Hydrogen is preferred as better coolant in comparison to CO? because former
A. Is lighter
B. Is inert
C. Has high specific heat
D. Is a good conductor
Answer : C

2. Reflector in nuclear power plants _________ neutron leakage.
A. Increases
B. Decreases
C. Have no effect on
D. None of these
Answer : B

3. In the breeder reactors the generation of new fissionable atom is
A. At the lower rate than the consumption
B. At a higher rate than the consumption
C. At an equal rate of the consumption
D. Depends on other considerations
Answer : B

4. 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
Answer : D

5. The process by which a heavy nucleus is spitted into two light nuclei is known as
A. Splitting
B. Fission
C. Fusion
D. Disintegration
Answer : B

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

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

8. Each fission of U??? produces on the average _________ fast neutrons as a product of reaction.
A. 2.46
B. 24.6
C. 246
D. 2460
Answer : A

9. 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
Answer : B

10. 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

11. The commonly used material for shielding is
A. Lead or concrete
B. Lead and tin
C. Graphite or cadmium
D. Thick galvanised sheets
Answer : A

12. A fast breeder reactor uses following as fuel
A. Enriched uranium
B. Plutonium
C. Thorium
D. U???
Answer : D

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

14. A moderator, apart from its high neutron slowing power, and low non-productive neutron, should be
A. Stable under nuclear radiation
B. Corrosion resistant
C. Good thermal conductor
D. All of these
Answer : D

15. In a thermal power plant, coal from the coal handling plant is moved to the boiler bunker through a
A. Belt conveyor
B. Bucket conveyor
C. Fork lift truck
D. Overhead crane
Answer : A

16. The primary fuel used in nuclear power plants is
A. U???
B. U???
C. Pu???
D. Pu???
Answer : A

17. Pick up the wrong statement fast breeder reactors
A. Operate at extremely high power densities.
B. Are liquid metal cooled
C. Produce more fuel than they consume
D. Use water as coolant
Answer : D

18. 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

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

20. 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

21. 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

22. Uranium has isotopes
A. U???
B. U???
C. U???
D. All of these
Answer : D

23. A nuclear reactor is said to be critical when the neutron population in the reactor core is
A. Rapidly increasing leading to the point of explosion
B. Decreasing from the specified value
C. Reduced to zero
D. Constant
Answer : D

24. The main interest of shielding in nuclear reactor is protection against
A. X-rays
B. Infrared rays
C. Neutrons and gamma rays
D. Electrons
Answer : D

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

26. 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

27. 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

28. Which of the following are ferrite materials?
A. U??? and Pu???
B. U
C. U??? and Pu???
D. U??? and Th???
Answer : B

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

30. 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

31. Boiling water reactor employs
A. Boiler
B. Direct cycle of coolant system
C. Double circuit system of coolant cycle
D. Multi passes system
Answer : B

32. 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

33. 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

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

35. U233 is produced
A. As basic raw material
B. By neutron irradiation of Uz
C. By neutron irradiation of thorium
D. Artificially
Answer : C

36. The control rods in the control system of nuclear reactors are used to
A. Absorb excess neutrons
B. Control fuel consumption
C. Control temperature
D. All of these
Answer : A

37. 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

38. A power plant giving least running cost of production of electrical power is
A. Steam power plant
B. Gas turbine power plant
C. Hydro electric power plant
D. Nuclear power plant
Answer : D

39. 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

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

41. 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

42. Which of the following statement is correct regarding the features of a Breeder reactor?
A. It produces more fuel than it consumes.
B. It requires highly enriched fuel.
C. It requires liquid sodium metal as moderator.
D. All of the above
Answer : D

43. 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

44. 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

45. The most practical fuel for a thermonuclear reactor, both from economical and nuclear consideration is
A. Plutonium
B. Uranium
C. Deuterium
D. Thorium
Answer : C

46. In nuclear fission each neutron that causes fission releases
A. No new neutron
B. At least one new neutron
C. One new neutron
D. More than one new neutron
Answer : D

47. In natural uranium, the constituents of three naturally occuring isotopes are
A. U??? = 0.006%, U??? = 0.712% and U??? = 99.282%
B. U??? = 0.712%, U??? = 0.006% and U??? = 99.282%
C. U??? = 99.282%, U??? = 0.006% and U??? = 0.712%
D. U??? = 0.006%, U??? = 99.282% and U??? = 0.712%
Answer : A

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

49. Each fission of U??? produces following number of fast neutrons per fission
A. 1 neutron
B. 3 neutrons
C. 1, 2 neutrons
D. 2 neutrons
Answer : D

50. The following present serious difficulty in designing reactor shield
A. Alpha particles
B. Beta particles
C. Thermal neutrons
D. Fast neutrons and gamma rays
Answer : D