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Chemical Engineering :: Nuclear Power Engineering

  1. Plutonium

  2. 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).

  3. A control rod

  4. A.
    should have small absorption cross-section.
    B.
    is generally made of boron, hafnium or cadmium.
    C.
    should have large absorption cross-section.
    D.
    both (b) and (c).

  5. Number of secondary neutron emitted on fission of an atom of U-235 by slow neutron bombardment is

  6. A.
    3
    B.
    235
    C.
    200
    D.
    92

  7. Enriched uranium means that, it contains

  8. A.
    more than 0.71% of U-235.
    B.
    only fertile material.
    C.
    only fissile material.
    D.
    no impurities.

  9. The radioisotope used to study the thyroid gland is

  10. A.
    iodine
    B.
    cobalt
    C.
    iron
    D.
    carbon

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

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

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

  14. A.
    temperature
    B.
    pressure
    C.
    amount of element present
    D.
    none of these

  15. Fuel for a fast breeder reactor is

  16. A.
    plutonium
    B.
    uranium
    C.
    radium
    D.
    neptunium

  17. Fast breeder test reactor at Kalpakkam is designed for using

  18. 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.

  19. In the gaseous diffusion process of uranium enrichment, the natural uranium is converted into gaseous

  20. A.
    uranium oxide
    B.
    uranium hexaflouride
    C.
    uranium carbide
    D.
    uranium sulphate