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  • Question
  • The 92U238 emits an a-particle. The product is


  • Options
  • A. 90U234
  • B. 90U238
  • C. 90U236
  • D. 92U236

  • Correct Answer
  • 90U234 


  • Nuclear Power Engineering problems


    Search Results


    • 1. 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
    • 2. A moderator __________ the neutrons.

    • Options
    • A. slows down
    • B. absorbs
    • C. accelerates
    • D. reflects
    • Discuss
    • 3. Which of the following is not an ore of uranium?

    • Options
    • A. Pitchblende
    • B. Kyanite
    • C. Carnotite
    • D. Rescolite
    • Discuss
    • 4. Critical energy should be __________ the neutron binding energy of the atom in order to initiate a nuclear fission.

    • Options
    • A. equal to
    • B. less than
    • C. more than
    • D. either more or less
    • Discuss
    • 5. The electric power generation cost in nuclear power plant is less than that in a coal based thermal power plant, mainly because the

    • Options
    • A. fuel cost per unit power generated is less.
    • B. thermal efficiency of the former is higher.
    • C. maintenance cost of the former is less.
    • D. none of these.
    • Discuss
    • 6. The ratio of atomic radius to its nuclear radius is about

    • Options
    • A. 105
    • B. 108
    • C. 1012
    • D. 1015
    • Discuss
    • 7. 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
    • 8. 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
    • 9. 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
    • 10. 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


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