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  • Question
  • The mass number of an element is equal to the number of __________ in the nucleus.


  • Options
  • A. electrons
  • B. neutrons
  • C. protons
  • D. neutrons plus protons (i.e., nucleons)

  • Correct Answer
  • neutrons plus protons (i.e., nucleons) 


  • Nuclear Power Engineering problems


    Search Results


    • 1. The half life period of a radioactive element depends upon the

    • Options
    • A. temperature
    • B. pressure
    • C. amount of element present
    • D. none of these
    • Discuss
    • 2. In a homogeneous nuclear reactor, the __________ are mixed together.

    • Options
    • A. fuel & coolant
    • B. fuel & moderator
    • C. coolant & moderator
    • D. none of these
    • Discuss
    • 3. Both tritium and deuterium have the same number of

    • Options
    • A. neutrons
    • B. electrons
    • C. protons
    • D. nucleons
    • Discuss
    • 4. Plutonium

    • Options
    • A. is recovered from spent fuel from thermal nuclear reactor.
    • B. has much lower melting point (640°C ) compared to thorium (1690°C).
    • C. both (a) and (b).
    • D. neither (a) nor (b).
    • Discuss
    • 5. Percentage of the heavy water in ordi water is around

    • Options
    • A. 0.015
    • B. 7.54
    • C. 0.71
    • D. 32.97
    • Discuss
    • 6. The radioisotope used to study the thyroid gland is

    • Options
    • A. iodine
    • B. cobalt
    • C. iron
    • D. carbon
    • Discuss
    • 7. Primary purpose of a __________ nuclear reactor is to supply a high neutron flux of the order of 1013 to 1014 neutrons/cm2 second.

    • Options
    • A. research
    • B. power
    • C. breeder
    • D. homogeneous
    • Discuss
    • 8. The most abundant isotope of natural uranium is

    • Options
    • A. 92U238
    • B. 92U235
    • C. 92U234
    • D. none of these
    • Discuss
    • 9. Which of the following reactors is operated at high neutron flux and low power level?

    • Options
    • A. Breeder reactor.
    • B. Research reactor.
    • C. Heterogeneous reactor.
    • D. Liquid metal (e.g., molten sodium) cooled reactor.
    • Discuss
    • 10. Mass of a positron is same as that of a/an

    • Options
    • A. electron
    • B. ?-particle
    • C. proton
    • D. neutron
    • Discuss


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