nuclear power plants MCQs – Page 2

Practise focused nuclear power plants questions with marked answers for exam preparation and subject revision.

nuclear power plants Mcqs

21. The process by which a heavy nucleus is splitted into two light nuclei is known as_________________?
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A. chain reaction

B. disintegration

C. fusion

D. splitting

E. fission

22. Amongst the following, the fissionable materials are________________?
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A. U233andPu239

B. U235andPu235

C. U23iandPu233

D. U243andPu235

E. U238andPu239

23. The fast breeder reactor uses the following moderator__________________?
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A. graphite

B. carbon dioxide

C. demineralised water

D. no moderator is used

E. heavy water

24. A nuclear fission is initiated when the critical energy as compared to neutron binding energy of the atoms is_________________?
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A. there is no such criterion

B. none of the above

C. less

D. same

E. more

25. In fast breeder reactors___________________?
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A. heavy water is used as the moderator

B. moderator may or may not be used

C. graphite is used as the moderator

D. any type of moderator can be used

E. moderator is dispensed with

26. Breeder reactor has a conversion ratio of_____________________?
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A. less than unity

B. zero

C. infinity

D. unity

E. more than unity

27. Which of the following is the heaviest________________?
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A. neutron

B. atom

C. electron

D. nucleus

E. proton

28. The number of isotopes of hydrogen are _________________?
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A. 2

B. 3

C. 0

D. 1

E. U

29. U238 will undergo fission by_________________?
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A. high energy (fast) neutrons alone

B. none of the above

C. medium energy neutrons

D. either fast or slow neutrons

E. low energy (slow) neutrons alone

30. The breeding gain in case of thermal breeder reactor as compared to fast breeder reactor is________________?
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A. same

B. unity

C. lower

D. higher/lower depending on the size of reactor

E. higher

31. One gram of uranium will produce energy equivalent to approximately____________________?
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A. 100 tonnes of high grade coal

B. 1000 tonnes of high grade coal

C. 1 tonne of high grade coal

D. 10 tonnes of high grade coal

E. 4.5 tonnes of high grade coal

32. The most commonly used moderator in nuclear plants is___________________?
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A. deutrium

B. graphite

C. graphite and concrete

D. concrete and bricks

E. heavy water

33. The mass number of a substance represents the sum of total number of___________________?
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A. protons and electrons in a nucleus

B. protons and neutrons in a nucleus

C. neutrons and electrons in an atom

D. protons and neutrons in an atom

E. protons and electrons in an atom

34. The commonly used material for shielding is__________________?
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A. thick galvanised sheets

B. graphite or cadmium

C. lead or concrete

D. black carbon papers

E. lead and tin

35. A nuclear fission produces energy of following order in MeV___________________?
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A. 20

B. 200

C. 20,000

D. 2000

E. 2 x 105

36. Moderator in nuclear plants is used to__________________?
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A. reduce temperature

B. moderate the radioactive pollution

C. control the reaction

D. extract heat from nuclear reaction

E. cause collision with the fast moving neutrons to reduce their speed

37. The energy required to be applied to a radioactive nucleus for the emission of a neutron is________________?
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A. 1 MeV

B. 4.3 MeV

C. 20 MeV

D. 7.8 MeV

E. 2.4 MeV

38. Which of the following are ferrite materials__________________?
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A. U233andPu239

B. U

C. U238andTh239

D. none of the above

E. U238andPu239

39. Ideally the neutron flux in reactor should be__________________ ?
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A. uniform throughout

B. maximum in center and zero at side

C. maximum at side and zero in center

D. zero throughout

E. none of the above

40. The nuclear power plant at Tarapur has the following reactor________________?
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A. pressurised water

B. fast breeder

C. sodium graphite

D. none of the above

E. boiling water

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