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  1. Each fission of U₂₃₅ produces on the average _________ fast neutrons as a product of reaction.

  2. A.

     2.46

    B.

     24.6

    C.

     246

    D.

     2460

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  3. Enriched uranium is required as a fuel in a nuclear reactor, if light water is used as moderator and coolant, because light water has

  4. A.

     High neutron absorption cross-section

    B.

     Low moderating efficiency

    C.

     High neutron scatter cross-section

    D.

     Low neutron absorption cross-section

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  5. In triggering fission, which types of neutrons are more effective?

  6. A.

     Fast

    B.

     Slow

    C.

     In bulk

    D.

     Static

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  7. A nuclear reactor is said to be critical when the neutron population in the reactor core is

  8. A.

     Rapidly increasing leading to the point of explosion

    B.

     Decreasing from the specified value

    C.

     Reduced to zero

    D.

     Constant

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  9. Pick up the wrong statement

  10. A.

     In a heterogeneous or solid fuel reactor, the fuel is mixed in a regular pattern within moderator

    B.

     Slow or thermal neutrons have energy of the order or 0.025 eV

    C.

     Fast neutrons have energies above 1000 eV

    D.

     Fast reactor uses moderator

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  11. The fuel needed, with reflector in nuclear power plant, in order to generate sufficient neutrons to sustain a chain reaction, would be

  12. A.

     More

    B.

     Less

    C.

     Same

    D.

     Zero

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  13. A power plant giving least running cost of production of electrical power is

  14. A.

     Steam power plant

    B.

     Gas turbine power plant

    C.

     Hydro electric power plant

    D.

     Nuclear power plant

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  15. A fast breeder reactor uses

  16. A.

     90% U₂₃₅

    B.

     U₂₃₈

    C.

     U₂₃₅

    D.

     Pu₂₃₉

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  17. Fast breeder reactor uses

  18. A.

     Boiler

    B.

     Direct cycle of coolant system

    C.

     Double circuit system of coolant cycle

    D.

     Multi passes system

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  19. In order to have constant chain reaction to produce a constant rate of heat output, the value of ratio of the number of neutrons in one generation to the number of neutrons in the immediately preceding generation must be

  20. A.

     Greater than 1.0

    B.

     Less than 1.0

    C.

     Equal to zero

    D.

     Equal to 1.0

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