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

1. 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

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

3. Reactors for propulsion applications are designed for
A. Any form of uranium
B. Natural uranium
C. Enriched uranium
D. Plutonium
Answer : C

4. 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

5. 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

6. 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

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

8. 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

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

10. Boiling water reactor uses the following as moderator, coolant and working fluid
A. Ordinary fluid
B. Heavy water
C. Molten lead
D. Hydrogen gas
Answer : A

11. 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

12. The coolant used in boiling water reactor is
A. CO2
B. Pressurised water
C. Mixture of water and steam
D. Liquid metal
Answer : C

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

14. 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

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

16. 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

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

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

19. 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
Answer : C

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

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

22. 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

23. In nuclear fission
A. The original elements change into completely different elements
B. The electrons of the element change
C. The molecules rearrange themselves to form other molecules
D. None of the above
Answer : A

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

25. 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

26. 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

27. 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

28. 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

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

30. Fast breeder reactor uses
A. Boiler
B. Direct cycle of coolant system
C. Double circuit system of coolant cycle
D. Multi passes system
Answer : C

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

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

33. 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

34. 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

35. 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

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

37. The nuclear radiators produced in a reactor which must be shielded are
A. Electrons
B. ?, ? and ? rays
C. Neutron and gamma rays
D. None of these
Answer : C

38. In boiling water reactor, moderator is
A. Coolant itself
B. Ferrite rod
C. Graphite rod
D. Liquid sodium metal
Answer : A

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

40. 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

41. 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

42. 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

43. 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

44. The secondary fuel used in nuclear power plants is
A. U??? and Pu???
B. U??? and Th???
C. U??? and Pu???
D. U??? and Pu???
Answer : A

45. 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

46. 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
Answer : D

47. 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

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

49. 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

50. 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