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1) 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 e. same chemical properties and same atomic numbers
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2) Amongst the following, the fissionable materials are________________? a. U233andPu239 b. U23iandPu233 c. U235andPu235 d. U238andPu239 e. U243andPu235
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3) The nuclear energy is measured as__________________? a. MeV b. curie c. farads d. MW e. kWhr
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4) 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 e. moderate the radioactive pollution
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5) The most commonly used moderator in nuclear plants is___________________? a. heavy water b. concrete and bricks c. graphite and concrete d. deutrium e. graphite
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6) The main interest of shielding in nuclear reactor is protection against_______________? a. X-rays b. infra-red rays c. a, P, and y rays d. neutrons and gamma rays e. electrons
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7) Which of the following are ferrite materials__________________? a. U233andPu239 b. U c. U238andPu239 d. U238andTh239 e. none of the above
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8) Enriched uranium is one in which__________________? a. %age of U235 has been artificially in-creased b. %age of U has been artificially increased c. %age of U234 has been artificially in-creased d. extra energy is pumped from outside e. all impurities have been removed
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9) Which of the following is the heaviest________________? a. neutron b. proton c. atom d. electron e. nucleus
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10) The breeding gain in case of thermal breeder reactor as compared to fast breeder reactor is________________? a. same b. lower c. higher d. unity e. higher/lower depending on the size of reactor
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