57. The process by which a heavy nucleus is splitted into two light nuclei is known as
A.Splitting
B.Fission
C.Fusion
D.Disintegration

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58. Boiling water reactor employs
A.Boiler
B.Direct cycle of coolant system
C.Double circuit system of coolant cycle
D.Multi pass system

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59. Which of the following are ferrite materials
A.U233 and Pu239
B.U238 and Th232
C.U238 and Pu239
D.U238 and Th239

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

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

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62. The most practical fuel for a thermonuclear reactor, both from economical and nuclear consideration is
A.Plutonium
B.Uranium
C.Deuterium
D.Thorium

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63. The breeding gain in case of thermal breeder reactor as compared to fast breeder reactor is
A.Same
B.Lower
C.Higher
D.Unity

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