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  • Question
  • Emission of ?-particles during radioactive decay of a substance is from


  • Options
  • A. innermost shell
  • B. nucleus
  • C. outermost shell
  • D. none of these

  • Correct Answer
  • nucleus 


  • Nuclear Power Engineering problems


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    • 1. 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
    • 2. 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
    • 3. The ratio of atomic radius to its nuclear radius is about

    • Options
    • A. 105
    • B. 108
    • C. 1012
    • D. 1015
    • Discuss
    • 4. The 92U238 emits an a-particle. The product is

    • Options
    • A. 90U234
    • B. 90U238
    • C. 90U236
    • D. 92U236
    • Discuss
    • 5. The function of moderators in nuclear reactor is to

    • Options
    • A. slow down the secondary neutrons.
    • B. absorb the secondary neutrons.
    • C. control the chain reaction.
    • D. none of these.
    • Discuss
    • 6. 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
    • 7. 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
    • 8. 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.
    • Discuss
    • 9. Which of the following ores contains maximum percentage of uranium?

    • Options
    • A. Carnotite
    • B. Thorium.
    • C. Rescolite
    • D. Pitchblende
    • Discuss
    • 10. __________ 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


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