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  • Question
  • A heterogeneous reactor is the one, in which the moderator and the


  • Options
  • A. coolant are different materials.
  • B. coolant are present in different phases (e.g., heavy water and graphite).
  • C. fuel are present in different phases (e.g. uranium and heavy water).
  • D. none of these.

  • Correct Answer
  • fuel are present in different phases (e.g. uranium and heavy water). 


  • Nuclear Power Engineering problems


    Search Results


    • 1. Isotopes of an element have the same

    • Options
    • A. number of neutrons
    • B. mass number
    • C. electronic configuration
    • D. atomic weight
    • Discuss
    • 2. An ideal coolant for a nuclear reactor should

    • Options
    • A. be a good absorber of neutrons.
    • B. be capable of attaining high temperature, only when it is pressurised.
    • C. have high density, but low heat transfer co-efficient.
    • D. be free from radiation damage and non-corrosive.
    • Discuss
    • 3. The emission of an a-particle causes the resultant nucleus to have

    • Options
    • A. more atomic weight and less atomic number.
    • B. less atomic weight and less atomic number.
    • C. less atomic weight and more atomic number.
    • D. none of these.
    • Discuss
    • 4. The molecular weight of heavy water is

    • Options
    • A. 10
    • B. 18
    • C. 20
    • D. 36
    • Discuss
    • 5. Pick out the wrong statement.

    • Options
    • A. The disintegration rate of a radioactive substance can not be increased by heating it.
    • B. Electrons have negligible mass and unit negative change.
    • C. Deuterium atom has one proton and two neutrons in its nucleus.
    • D. Cadmium is capable of absorbing neutrons.
    • Discuss
    • 6. The phenomenon of nuclear fission is opposite to that of

    • Options
    • A. radioactive decay
    • B. thermionic emission
    • C. nuclear fusion
    • D. combustion
    • Discuss
    • 7. A thermal nuclear reactor compared to a fast breeder reactor

    • Options
    • A. uses slower neutrons for fission.
    • B. uses faster neutrons for fission.
    • C. gives higher power density.
    • D. requires less fuel to run at the same power level.
    • Discuss
    • 8. Quantity of fissionable material (i.e. U-235) in natural uranium is __________ percent.

    • Options
    • A. 0.71
    • B. 6.31
    • C. 99.29
    • D. 12.73
    • Discuss
    • 9. Heavy water is used as a moderator in a

    • Options
    • A. pressurised water reactor (PWR).
    • B. boiling water reactor (BWR).
    • C. Candu reactor.
    • D. molten sodium cooled reactor.
    • Discuss
    • 10. Isotopes of an element have different

    • Options
    • A. mass number
    • B. electronic configuration
    • C. nuclear charge
    • D. chemical properties
    • Discuss


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