1) A fission chain reaction in uranium can be developed by________________? a. slowing down fast neutrons so that Uz fission continues by slow motion neutrons b. accelerating fast neutrons c. absorbing all neutrons d. using moderator e. enriching U235
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2) The fuel needed, with reflector in nuclear power plant, in order to generate sufficient neutrons to sustain a chain reaction, would be________________? a. more b. less c. same d. zero e. negative, i.e. fuel would be generated
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3) 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 condi-tions e. nuclear hazard risk
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4) The presence of reflector in nuclear power plants results in___________________? a. increased production of neutrons b. complete absorption of neutrons c. controlled production of neutrons d. decreased leakage of neutrons e. decrease of speed of neutrons
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5) The most practical fuel for a thermo-nuclear reactor, both from econocical and nuclear consideration is____________________? a. plutonium b. uranium c. deuterium d. thorium e. lithium
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6) The coolant used in boiling water reactor is________________? a. Co2 b. pressurised water c. mixture of water and steam d. liquid metal e. mercury
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7) Effective moderators are those materials which contain____________________? a. light weight atoms b. heavy weight atoms c. critical atoms d. zero weight atoms e. there is no such criterion
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8) A fast breeder reactor uses_______________? a. 90% U-235 b. U-238 c. U-235 d. Pu-239 e. U-239
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9) Pressurised water reactor is designed________________? a. for boiling pi water in the core b. to use liquid sodium metal as coolant c. to use intermediate coolant d. to prevent the water coolant from boiling in the core e. to eliminate the coolant loop of the pressurised water
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10) In boiling water reactor, moderator is__________________? a. coolant itself b. ferrite rod c. graphite rod d. liquid sodium metal e. blanket of thorium
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