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  • Question
  • 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

  • Correct Answer
  • more than 


  • Nuclear Power Engineering problems


    Search Results


    • 1. 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
    • 2. A radioactive isotope undergoes decay with respect to time following __________ law.

    • Options
    • A. logarithmic
    • B. exponential
    • C. linear
    • D. inverse square
    • Discuss
    • 3. Use of molten metal as a coolant in fast breeder reactor helps in

    • Options
    • A. rapid heat transfer from the core.
    • B. accelerating the reaction rate in the core.
    • C. breeding neutrons.
    • D. accelerating the neutrons.
    • Discuss
    • 4. Which of the following is the most harmful for the human being?

    • Options
    • A. ?-rays
    • B. X-rays
    • C. ?-rays
    • D. ultra violet rays
    • Discuss
    • 5. The main ore of uranium is

    • Options
    • A. pitchblende
    • B. monazite sand
    • C. cassiterite
    • D. chalcopyrite
    • Discuss
    • 6. Which of the following is not an ore of uranium?

    • Options
    • A. Pitchblende
    • B. Kyanite
    • C. Carnotite
    • D. Rescolite
    • Discuss
    • 7. A moderator __________ the neutrons.

    • Options
    • A. slows down
    • B. absorbs
    • C. accelerates
    • D. reflects
    • Discuss
    • 8. 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
    • 9. The 92U238 emits an a-particle. The product is

    • Options
    • A. 90U234
    • B. 90U238
    • C. 90U236
    • D. 92U236
    • Discuss
    • 10. The ratio of atomic radius to its nuclear radius is about

    • Options
    • A. 105
    • B. 108
    • C. 1012
    • D. 1015
    • Discuss


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