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  • Question
  • A fast breeder reactor employs


  • Options
  • A. graphite as moderator.
  • B. water as coolant.
  • C. molten sodium as coolant as well as moderator.
  • D. U-235 as fuel.

  • Correct Answer
  • U-235 as fuel. 


  • Nuclear Power Engineering problems


    Search Results


    • 1. Which of the following types of nuclear reactors is most prone to radioactive hazards?

    • Options
    • A. Pressurised water reactor
    • B. Gas cooled reactor
    • C. Molten sodium cooled reactor
    • D. Boiling water reactor
    • Discuss
    • 2. Pick out the wrong statement.

    • Options
    • A. The nucleus of a hydrogen atom is identical with a proton.
    • B. A, ?-ray particle is identical with an electron.
    • C. Mass of an electron is about 1/1800th of the lightest nucleus.
    • D. Positron is heavier than a proton.
    • Discuss
    • 3. Emission of ?-particles during radioactive decay of a substance is from

    • Options
    • A. innermost shell
    • B. nucleus
    • C. outermost shell
    • D. none of these
    • Discuss
    • 4. The number of neutrons accompanying the formation of 54Xe139 and 38Sr94 from the absorption of a slow neutron by 92U235 , followed by nuclear fission is

    • Options
    • A. 1
    • B. 2
    • C. 3
    • D. 4
    • Discuss
    • 5. The time required for half of the __________ of a radioactive isotope to decay is called its half life.

    • Options
    • A. nuclei
    • B. electrons
    • C. protons
    • D. neutrons
    • Discuss
    • 6. Which of the following ores contains maximum percentage of uranium?

    • Options
    • A. Carnotite
    • B. Thorium.
    • C. Rescolite
    • D. Pitchblende
    • Discuss
    • 7. __________ nuclear reactor does not require a heat exchanger to supply steam to power turbine.

    • Options
    • A. Molten sodium cooled
    • B. Helium cooled
    • C. Boiling water
    • D. Pressurised water
    • Discuss
    • 8. Thermal nuclear reactors using enriched uranium as fuel contains a maximum of __________ percent fissile material i.e. U-235.

    • Options
    • A. 1
    • B. 2
    • C. 3
    • D. 7
    • Discuss
    • 9. The half life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half life period of a radioactive substance is one month, then

    • Options
    • A. 3/4th of it will disintegrate in two months.
    • B. it will completely disintegrate in two months.
    • C. it will completely disintegrate in four months.
    • D. l/8th of it will remain intact at the end of four months.
    • Discuss
    • 10. Enrichment of uranium is done to increase the concentration of __________ in the natural uranium.

    • Options
    • A. U-238
    • B. U-233
    • C. U-235
    • D. Pu-239
    • Discuss


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