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  • Question
  • 75% of a radioactive element decays in 6 hours. Its half life period is __________ hours.


  • Options
  • A. 3/4
  • B. 1/6
  • C. 3
  • D. 4

  • Correct Answer



  • Nuclear Power Engineering problems


    Search Results


    • 1. Extraction of uranium from its ore is done by __________ method.

    • Options
    • A. chemical
    • B. pyrometallurgical
    • C. physical beneficiation
    • D. electrometallurgical
    • Discuss
    • 2. A pressurised water reactor (PWR) uses pressurised water as a

    • Options
    • A. coolant.
    • B. working fluid in power turbine.
    • C. moderator.
    • D. none of these.
    • Discuss
    • 3. Which of the following is the best nuclear fuel?

    • Options
    • A. Np- 239
    • B. U-234
    • C. Pu-239
    • D. Th-236
    • Discuss
    • 4. Which of the following is present in Bhabha Atomic Research Centre (BARC) complex, Trombay (Bombay)?

    • Options
    • A. Power reactor
    • B. Research reactor
    • C. Fast breeder reactor
    • D. Heavy water plant
    • Discuss
    • 5. 'Heavy water' is termed as 'heavy' because it is

    • Options
    • A. denser than water.
    • B. an oxide of deuterium.
    • C. a heavy liquid.
    • D. an oxide of heavier isotope of oxygen.
    • Discuss
    • 6. The atomic mass of an element is fractional, because

    • Options
    • A. of uncertainty principle.
    • B. it may have isobars.
    • C. it contains neutrons.
    • D. it may have isotopes.
    • Discuss
    • 7. Positron is a/an

    • Options
    • A. nucleus having two protons.
    • B. helium nucleus.
    • C. electron with positive charge.
    • D. nucleus with one proton and one neutron.
    • Discuss
    • 8. 'Light water' used as a coolant in nuclear reactor is nothing but

    • Options
    • A. ordinary water.
    • B. mildly acidic (pH = 6) water.
    • C. mildly alkaline (pH = 8) water.
    • D. none of these.
    • Discuss
    • 9. A radioactive substance does not emit

    • Options
    • A. ?-ray
    • B. proton
    • C. position
    • D. ?-ray
    • Discuss
    • 10. Heavy water plant is not located at

    • Options
    • A. Kota and Baroda
    • B. Talcher (Orissa)
    • C. Tuticorin(Tamilnadu)
    • D. Korba
    • Discuss


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