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Chemical Engineering :: Nuclear Power Engineering

  1. The velocity of thermal (slow) neutrons triggering nuclear fission reaction (having energy equal to 0.025 eV) is about __________ metres/second.

  2. A.
    1100
    B.
    2200
    C.
    3300
    D.
    4400

  3. Thermal shield is used in high powered nuclear reactors to

  4. A.
    protect the walls of the reactor from radiation damage.
    B.
    absorb the fast neutrons.
    C.
    slow down the secondary neutrons.
    D.
    protect the fuel element from coming in contact with the coolant.

  5. The half life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half life period of a radioactive substance is one month, then

  6. A.
    3/4th of it will disintegrate in two months.
    B.
    it will completely disintegrate in two months.
    C.
    it will completely disintegrate in four months.
    D.
    l/8th of it will remain intact at the end of four months.

  7. The 92U238 emits an a-particle. The product is

  8. A.
    90U234
    B.
    90U238
    C.
    90U236
    D.
    92U236

  9. Graphite is used in nuclear reactor as

  10. A.
    insulation lining of the reactor.
    B.
    fuel.
    C.
    lubricant.
    D.
    retarder of neutron velocity.

  11. The half life period of a radioactive element depends on its

  12. A.
    temperature
    B.
    pressure
    C.
    amount
    D.
    none of these

  13. __________ have the same mass number, but different nuclear charge.

  14. A.
    Isotopes
    B.
    Isobars
    C.
    Isotones
    D.
    none of these

  15. Which one is radioactive in nature ?

  16. A.
    Helium
    B.
    Deuterium
    C.
    Heavy hydrogen
    D.
    Tritium

  17. Absorption/scattering cross-section of an element is expressed in "barn", which is equivalent to

  18. A.
    10-24 cm2
    B.
    10-12 cm
    C.
    1 Angstrom
    D.
    10-24 cm

  19. The most commonly used nuclear fuel in boiling water reactor is

  20. A.
    enriched uranium
    B.
    natural uranium
    C.
    plutonium
    D.
    monazite sand