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  • Question
  • Moderating material used in a thermal-reactor should be a


  • Options
  • A. good absorber of neutrons.
  • B. solid substance.
  • C. poor absorber of neutrons.
  • D. none of these.

  • Correct Answer
  • poor absorber of neutrons. 


  • Nuclear Power Engineering problems


    Search Results


    • 1. Sodium melts (at atmospheric pressure) at a temperature of __________ °C.

    • Options
    • A. 58
    • B. 98
    • C. 348
    • D. 588
    • Discuss
    • 2. Fast breeder Test Reactor (FBTR) is located at

    • Options
    • A. Kalpakkam (near Madras).
    • B. Kota (in Rajasthan).
    • C. BARC (Trombay).
    • D. Tarapur (in Maharashtra).
    • Discuss
    • 3. Hydrogen has __________ isotopes.

    • Options
    • A. no
    • B. one
    • C. two
    • D. three
    • Discuss
    • 4. Hydrogen bomb employs the nuclear fusion of

    • Options
    • A. hydrogen
    • B. deuterium
    • C. tritium
    • D. helium
    • Discuss
    • 5. A homogeneous reactor is the one, in which the

    • Options
    • A. fissile atoms are evenly distributed throughout the mass of nuclear reactor.
    • B. same substance (e.g. heavy water) is used as moderator & coolant.
    • C. the fuel and the moderator is mixed to form a homogeneous material.
    • D. all (a), (b) and (c).
    • Discuss
    • 6. Velocity of the thermal neutron (< 0.025 eV) used for fission of U-235 is around __________ m/sec.

    • Options
    • A. 1
    • B. 2200
    • C. 3 x 1011
    • D. 9 x 1021
    • Discuss
    • 7. The mass number of an element is not changed, when it emits __________ radiations.

    • Options
    • A. ? & ?
    • B. ? & ?
    • C. ? & ?
    • D. ?, ?, & ?
    • Discuss
    • 8. Which of the following may not need a control rod?

    • Options
    • A. Liquid metal cooled reactor.
    • B. Fast breeder reactor.
    • C. Candu reactor.
    • D. None of these.
    • Discuss
    • 9. One 'amu' is equivalent to

    • Options
    • A. 9.31 MeV
    • B. 931 eV
    • C. 931 Mev
    • D. 931J
    • Discuss
    • 10. The ratio of volume of an atom to that of its nucleus is

    • Options
    • A. 1012
    • B. 10-12
    • C. 10-8
    • D. 108
    • Discuss


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