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  • Question

  • 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.

  • Correct Answer
  • it may have isotopes. 

    • Nuclear Power Engineering problems

    Search Results

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

    • Options
    • A. chemical
    • B. pyrometallurgical
    • C. physical beneficiation
    • D. electrometallurgical
      • Discuss
    • 3. 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
    • 4. Which of the following is the best nuclear fuel?

    • Options
    • A. Np- 239
    • B. U-234
    • C. Pu-239
    • D. Th-236
      • Discuss
    • 5. 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
    • 6. 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
    • 7. '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
    • 8. A radioactive substance does not emit

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

    • Options
    • A. Kota and Baroda
    • B. Talcher (Orissa)
    • C. Tuticorin(Tamilnadu)
    • D. Korba
      • Discuss
    • 10. Fast breeder test reactor at Kalpakkam is designed for using

    • Options
    • A. thorium as a fertile material.
    • B. U-238 as a fertile material.
    • C. helium as a coolant.
    • D. uranium ore directly as a fuel.
      • Discuss

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