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Mechanical Engineering :: IC Engine and Nuclear Power Plants

  1. The reference fuels for knock rating of spark ignition engines would include

  2. A.
    iso-octane and alpha-methyl naphthalene
    B.
    normal octane and aniline
    C.
    iso-octane and normal hexane
    D.
    normal heptane and iso-octane

  3. The diesel engines are also known as __________ engines.

  4. A.
    compression ignition
    B.
    spark ignition

  5. In a four stroke cycle, the minimum temperature inside the engine cylinder occurs at the

  6. A.
    beginning of suction stroke
    B.
    end of suction stroke
    C.
    beginning of exhaust stroke
    D.
    end of exhaust stroke

  7. In hit and miss governing, the fuel supply is cut-off completely during one or more number of cycles.

  8. A.
    Yes
    B.
    No

  9. The thermal efficiency of a standard Otto cycle for a compression ratio of 5.5 will be

  10. A.
    25%
    B.
    50%
    C.
    70%
    D.
    100%

  11. The ratio of the volume of charge admitted at N.T.P. to the swept volume of the piston is called

  12. A.
    mechanical efficiency
    B.
    overall efficiency
    C.
    volumetric efficiency
    D.
    relative efficiency

  13. The exhaust valve in a four stroke cycle petrol engine

  14. A.
    opens at 50° before bottom dead centre and closes at 15° after top dead centre
    B.
    opens at bottom dead centre and closes at top dead centre
    C.
    opens at 50° after bottom dead centre and closes at 15° before top dead centre
    D.
    may open and close anywhere

  15. Nuclear reactors are used

  16. A.
    to produce heat for thermoelectric power
    B.
    to produce fissionable material
    C.
    to propel ships, submarines, aircrafts
    D.
    all of these

  17. A moderator generally used in nuclear power plants is

  18. A.
    graphite
    B.
    heavy water
    C.
    concrete
    D.
    graphite and concrete

  19. The predominent isotope of the naturally occuring element is

  20. A.
    U235
    B.
    U238
    C.
    Pu233
    D.
    Pu239