LSAT - Power Plant Engineering 1000+ MCQ [Solved] PDF Download

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

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

3. Pick up the wrong statement
A. In a heterogeneous or solid fuel reactor, the fuel is mixed in a regular pattern within moderator.
B. Slow or thermal neutrons have energy of the order or 0.025 eV
C. Fast neutrons have energies above 1000 eV
D. Fast reactor uses moderator
Answer : D

4. 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

5. 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

6. 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

7. 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

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

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

10. 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

11. 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

12. 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

13. 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

14. 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

15. 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

16. 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

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

18. 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

19. 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

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

21. 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

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

23. 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

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

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. 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

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. U??? is produced
A. Artificially
B. As basic raw material
C. When thorium is irradiated by neutrons
D. By fission of U???
Answer : C

29. Which of the following particles is the lightest?
A. Nucleus
B. Electron
C. Proton
D. Meson
Answer : B

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

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

32. The efficiency of a nuclear power plant in comparison to conventional and nuclear consideration is
A. Higher cost of nuclear fuel
B. High initial cost
C. High heat rejection in condenser
D. Lower temperature and pressure conditions
Answer : D

33. 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

34. 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

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

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

37. 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

38. 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

39. 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

40. Natural uranium is made up of
A. 99.282% U???, 0.712% U???, 0.006% U???
B. 99.282% U???, 0.712% U???, 0.06%' U???
C. 99.282% U???, 0.712% U???, 0.006% U???
D. 99.282% U???, 0.712% U???, 0.006% U???
Answer : A

41. 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

42. Which of the following is the heaviest?
A. Neutron
B. Proton
C. Atom
D. Electron
Answer : C

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

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

45. 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

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

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

48. 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

49. Solid fuel for nuclear reactions may be fabricated into various small shapes such as
A. Plates
B. Pallets
C. Pins
D. Any one of the above
Answer : D

50. 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