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Power Plant Engineering - section-1
  1. The following present serious difficulty in designing reactor shield

    2. A.

     Alpha particles
    B.

     Beta particles
    C.

     Thermal neutrons
    D.

     Fast neutrons and gamma rays

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  2. Uranium has isotopes

    3. A.

     U₂₃₄
    B.

     U₂₃₅
    C.

     U₂₃₈
    D.

     All of these

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  3. The most commonly used moderator in nuclear plants is

    4. A.

     Heavy water
    B.

     Concrete and bricks
    C.

     Graphite and concrete
    D.

     Graphite

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  4. Breeder reactor has a conversion ratio of

    5. A.

     Unity
    B.

     More than unity
    C.

     Less than unity
    D.

     Zero

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  5. Hydrogen is preferred as better coolant in comparison to CO₂ because former

    6. A.

     Is lighter
    B.

     Is inert
    C.

     Has high specific heat
    D.

     Is a good conductor

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  6. Half life of a radioactive isotope corresponds to the time required for half of the following to decay

    7. A.

     Electrons
    B.

     Protons
    C.

     Neutrons
    D.

     Atom

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  7. When a reactor becomes critical, then the production of neutrons is

    8. A.

     Infinite
    B.

     Zero
    C.

     Exactly balanced by the loss of neutrons through leakage
    D.

     Initiated

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  8. The energy released during the fission of one atom of Uranium 235 in million electron volts is about

    9. A.

     100
    B.

     200
    C.

     300
    D.

     400

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  9. Plutonium is produced

    10. A.

     As basic raw material
    B.

     By neutron irradiation of Uz
    C.

     By neutron irradiation of thorium
    D.

     Artificially

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  10. In triggering fission, the following types of neutrons are desirable

    11. A.

     Fast moving
    B.

     Slow moving
    C.

     Critical neutrons
    D.

     Neutrons at rest

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