The function of control rods in nuclear plants is to__________________? - PakMcqs

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1. 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...

2. 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...

3. 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...

4. The most commonly used moderator in nuclear plants is___________________?

   A. heavy water B. concrete and bricks C. graphite and concrete D. deutrium E. graphite...

5. Reflector in nuclear plants is used to________________?

   A. return the neutrons back into the core B. shield the radioactivity completely C. check polllution D. conserve energy E. is not used...

6. 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...

7. 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...

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

   A. same B. more C. less D. there is no such criterion E. none of the above...

9. 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...

10. In nuclear fission___________________?

    A. the original elements change into completely different elements B. the electrons of the element change C. the molecules rearrange themselves to form other molecules D. none of the above...