Nuclear Power Plant MCQs Quiz Multiple Choice Questions & Answers

1. A nuclear fission is initiated when the critical energy as compared to neutron binding energy of the atoms is

1. same
2. more
3. less
4. none of the above

2. A nuclear fission produces energy of following order in MeV

1. 20
2. 200
3. 2000
4. 20000

3. A nuclear unit becoming critical means

1. it is generating power to rated capacity
2. it is capable of generating much more than rated capacity
3. there is danger of nuclear spread
4. chain reaction that causes automatic splitting of the fuel nuclei has been established

4. A reactor capable of converting a ferrite material into fissile isotopes is called

1. regenerative reactor
2. fast breeder reactor
3. breeder reactor
4. boiling water reactor

5. Amongst the following, the fissionable materials are

1. U-233 and Pu-239
2. U-23i and Pu-233
3. U-235 and Pu-235
4. U-238 and Pu-239

6. Boiling water reactor employs

1. boiler
2. direct cycle of coolant system
3. double circuit system of coolant cycle
4. multi pass system

7. Breeder reactor has a conversion ratio of

1. unity
2. more than unity
3. less than unity
4. zero

8. Fast breeder reactor uses

1. boiler
2. direct cycle of coolant system
3. double circuit system of coolant cycle
4. multi pass system

9. For economical operation of a nuclear plant

1. used fuel should be reprocessed
2. moderator should be used
3. coolant should be employed
4. control rods should be used

10. Gas cooled reactor uses following materials as moderator, and coolant

1. graphite, C02
2. graphite, air
3. heavy water, C02
4. lead, H2

11. Hydrogen is preferred as better coolant in comparison to C02 because former

1. is lighter
2. is inert
3. has high specific heat
4. is a good conductor

12. In boiling water reactor, moderator is

1. coolant itself
2. ferrite rod
3. graphite rod
4. liquid sodium metal

13. In nuclear fission each neutron that causes fission releases

1. no new neutron
2. at least one new neutron
3. one new neutron
4. more than one new neutrons

14. Moderator in nuclear plants is used to

1. moderate the radioactive pollution
2. extract heat from nuclear reaction
3. control the reaction
4. cause collision with the fast moving neutrons to reduce their speed

15. One gram of uranium will produce energy equivalent to approximately

1. 1 tonne of high grade coal
2. 4.5 tonnes of high grade coal
3. 10 tonnes of high grade coal
4. 100 tonnes of high grade coal

16. Plutonium is produced

1. as basic raw material
2. by neutron irradiation of Uz
3. by neutron irradiation of throium
4. artificially

17. Reactors for propulsion applications use

1. natural uranium
2. molten lead
3. any form of uranium
4. thorium

18. Reflector in nuclear plants is used to

1. return the neutrons back into the core
2. shield the radioactivity completely
3. check polllution
4. conserve energy

19. The breeding gain in case of thermal breeder reactor as compared to fast breeder reactor is

1. same
2. lower
3. higher
4. unity

20. The coolant used in boiling water reactor is

1. Co2
2. pressurised water
3. mixture of water and steam
4. liquid metal

21. The efficiency of a nuclear power plant in comparsion to a conventional thermal power plant is

1. same
2. more
3. less
4. may be less or mote depending on size

22. The energy produced by a thermal reactor of same size as a breeder reactor is

1. almost same
2. slightly more
3. slightly less
4. much less

23. The energy required to be applied to a radioactive nucleus for the emission of a neutron is

1. 1 MeV
2. 2.4 MeV
3. 4.3 MeV
4. 7.8 MeV

24. The first nunclear power plant in India is located at

1. Kota
2. Kalapakkam
3. Tarapur
4. Baraeilly

25. The function of control rods in nuclear plants is to

1. control temperature
2. control readioactive pollution
3. control absorption of neutron
4. control fuel consumption

26. The main interest of shielding in nuclear reactor is protection against

1. X-rays
2. infra-red rays
3. a, P, and y rays
4. neutrons and gamma rays

27. The most commonly used moderator in nuclear plants is

1. heavy water
2. graphite
3. deutrium
4. graphite and concrete

28. The nuclear energy is measured as

1. MeV
2. curie
3. kWhr
4. MW

29. The process by which a heavy nucleus is splitted into two light nuclei is known as

1. splitting
2. fission
3. fusion
4. chain reaction

30. The risk of radioactive hazard is greatest in the turbine with following reactor

1. pressurised water
2. boiling water
3. gas cooled
4. liquid metal cooled

31. The size of the reactor is said to be critical when

1. chain reaction can be initiated
2. it becomes uncontrollable
3. it explodes
4. it produces no power

32. The total energy released in fission of U is

1. 5 MeV
2. 10 MeV
3. 199 MeV
4. 168 MeV

33. The unit of radio-activity is

1. electron-volt
2. electron-ampere
3. curie
4. MeV

34. U235 will undergo fission by

1. high energy (fast) neutrons alone
2. low energy (slow) neutrons alone
3. either fast or slow neutrons
4. medium energy neutrons

35. U238 will undergo fission by

1. high energy (fast) neutrons alone
2. low energy (slow) neutrons alone
3. either fast or slow neutrons
4. medium energy neutrons

36. Uranium-233 is produced

1. as basic raw material
2. by neutron irradiation of Uz
3. by neutron irradiation of thorium
4. artificially

37. Which of the following is the primary fuel

1. Ulii
2. U
3. U238
4. Pu

38. Which of the following nuclear reactor does not need a heat exchanger for generation of steam

1. gas cooled
2. liquid metal cooled
3. pressurised water
4. boiling water