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  • Question
  • The largest stable nucleus is


  • Options
  • A. U-235
  • B. U-238
  • C. Pb-206
  • D. Bi-209

  • Correct Answer
  • U-235 


  • Nuclear Power Engineering problems


    Search Results


    • 1. A boiling water reactor is the one, in which the

    • Options
    • A. coolant water is allowed to boil in the core of the reactor.
    • B. coolant water, after being heated in the reactor core, generates steam in a boiler.
    • C. pressurised water is pumped into the core.
    • D. fuel and the coolant are thoroughly mixed to form a homogeneous solution.
    • Discuss
    • 2. Ordinary water is not used as a moderator because, it

    • Options
    • A. has a low absorption cross-section.
    • B. has a low scattering cross-section.
    • C. absorbs neutrons.
    • D. does not absorb neutrons.
    • Discuss
    • 3. Final product of uranium extraction plant at Jadugoda (Bihar) is

    • Options
    • A. uranium
    • B. uranium oxide
    • C. uranium carbide
    • D. magnesium diuranate
    • Discuss
    • 4. The time taken for a radioactive element to reduce to 50% of its original weight is __________ years, if its half life period is 12 years.

    • Options
    • A. 24
    • B. 18
    • C. 6
    • D. 36
    • Discuss
    • 5. An electron has a mass that is approximately __________ that of the proton.

    • Options
    • A. 1836 (approximately)
    • B. 1/1836 (approximately)
    • C. 1
    • D. ?
    • Discuss
    • 6. Which is the most commonly used molten metal for cooling of nuclear reactors?

    • Options
    • A. Calcium
    • B. Sodium
    • C. Mercury
    • D. Zinc
    • Discuss
    • 7. The decay product of tritium (a beta emitter) is

    • Options
    • A. lithium
    • B. helium
    • C. deuterium
    • D. hydrogen
    • Discuss
    • 8. Which of the following may be used to measure the rate of nuclear disintegration?

    • Options
    • A. Geiger-Muller Counter
    • B. Cyclotron
    • C. Cold chamber
    • D. Mass spectrograph
    • Discuss
    • 9. "Critical mass" is the minimum mass of nuclear fissile material required for the

    • Options
    • A. sustainment of chain reaction.
    • B. power generation on commercial scale.
    • C. economic power generation.
    • D. none of these.
    • Discuss
    • 10. A nuclear reactor can't be used for

    • Options
    • A. the production of radioisotopes.
    • B. supplying intense fields or beams of neutron for scientific experiments.
    • C. marine ship propulsion.
    • D. none of these.
    • Discuss


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