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Mechanical Engineering :: IC Engine and Nuclear Power Plants

  1. In natural uranium, the constituents of three naturally occuring isotopes are

  2. A.
    U234 = 0.006%, U235 = 0.712% and U238 = 99.282%
    B.
    U234 = 0.712%, U235 = 0.006% and U238 = 99.282%
    C.
    U234 = 99.282%, U235 = 0.006% and U238 = 0.712%
    D.
    U234 = 0.006%, U235 = 99.282% and U238 = 0.712%

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  3. Stoichiometric ratio is

  4. A.
    chemically correct air-fuel ratio by weight
    B.
    chemically correct air-fuel ratio by volume
    C.
    actual air-fuel ratio for maximum efficiency
    D.
    none of the above

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  5. Which of the following fuel has little tendency towards detonation ?

  6. A.
    Benzene
    B.
    Iso-octane
    C.
    Normal heptane
    D.
    Alcohol

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  7. In a petrol engine, the fuel supplied to the engine cylinder is mixed with required quantity of air and the mixture is ignited with a

  8. A.
    fuel pump
    B.
    fuel injector
    C.
    spark plug
    D.
    none of these

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  9. A nuclear power plant differs from a conventional steam power station only in the steam generating part.

  10. A.
    Agree
    B.
    Disagree

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  11. Enriched uranium may contain fissionable contents from

  12. A.
    1 to 40%
    B.
    10 to 50%
    C.
    1 to 80%
    D.
    1 to 99%

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  13. In a four stroke engine, the working cycle is completed in

  14. A.
    one revolution of the crankshaft
    B.
    two revolutions of the crankshaft
    C.
    three revolutions of the crankshaft
    D.
    four revolutions of the crankshaft

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  15. If the fuel is rich in fissionable material, the reactor can be made more compact than if the percentage of fissionable atoms is small.

  16. A.
    Agree
    B.
    Disagree

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  17. The overall efficiency is defined as the ratio of the work obtained at the crankshaft in a given time to the energy supplied during the same time.

  18. A.
    True
    B.
    False

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