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

1. 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

2. 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

3. 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

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

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

6. 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

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

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

9. 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

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

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

12. 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

13. 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

14. 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

15. 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

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

17. In triggering fission, which types of neutrons are more effective?
A. Fast
B. Slow
C. In bulk
D. Static
Answer : B

18. 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

19. 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

20. A pressurised water reactor employs pressurises for the following application
A. To maintain constant pressure in primary circuit under varying load
B. To Supply high pressure steam
C. To increase pressure of water in primary circuit
D. To provide sub cooled water at high pressure
Answer : A

21. 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

22. 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

23. In triggering fission, the following types of neutrons are desirable
A. Fast moving
B. Slow moving
C. Critical neutrons
D. Neutrons at rest
Answer : B

24. 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

25. 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

26. The material most commonly used for shielding is
A. Carbon
B. Lead
C. Concrete
D. All of these
Answer : C

27. 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

28. 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

29. Which of the following type of pump is used in liquid metal cooled reactor for circulation of liquid metal
A. Centrifugal
B. Axial
C. Reciprocation
D. Electromagnetic
Answer : D

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

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

32. Effective moderators are those materials which contain
A. Light weight atoms
B. Heavy weight atoms
C. Critical atoms
D. Zero weight atoms
Answer : A

33. 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

34. 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

35. 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

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

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

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

39. 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

40. 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

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

42. The function of control rods in nuclear plants is to
A. Control temperature
B. Control radioactive pollution
C. Control absorption of neutron
D. Control fuel consumption
Answer : C

43. 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

44. Enriched uranium is one in which
A. Percentage of U??? has been artificially increased
B. Percentage of U has been artificially increased
C. Percentage of U??? has been artificially increased
D. Extra energy is pumped from outside
Answer : A

45. Nuclear reactors are used
A. To produce heat for thermoelectric power
B. To produce fissionable material
C. To propel ships, submarines, aircrafts
D. All of these
Answer : D

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

47. 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

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

49. 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

50. 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