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Mechanical Engineering :: IC Engine and Nuclear Power Plants

  1. The indicated mean effective pressure of an engine is obtained from the indicator diagram drawn with the help of an engine indicator.

  2. A.
    True
    B.
    False

  3. A fuel of cetane number 40 has the same ignition quality as a mixture of

  4. A.
    40% cetane and 60% alpha methyl napthalene
    B.
    40% alpha methyl napthalene and 60% cetane
    C.
    40% petrol and 60% diesel
    D.
    40% diesel and 60% petrol

  5. The two reference fuels used for cetane rating are

  6. A.
    cetane and iso-octane
    B.
    cetane and alpha-methyl naphthalene
    C.
    cetane and normal heptane
    D.
    cetane and tetra ethyl lead

  7. In petrol engines, the delay period is of the order of

  8. A.
    0.001 second
    B.
    0.002 second
    C.
    0.003 second
    D.
    0.004 second

  9. The reflectivity of a reflector is defined as the fraction of neutrons entering the reflector which are returned to the core.

  10. A.
    Agree
    B.
    Disagree

  11. In a four stroke cycle petrol engine, the pressure inside the engine cylinder during the suction stroke is __________ the atmospheric pressure.

  12. A.
    equal to
    B.
    below
    C.
    above

  13. A diesel engine is __________ as compared to petrol engine, both running at rated load.

  14. A.
    equally efficient
    B.
    less efficient
    C.
    more efficient

  15. Which one of the following event would reduce volumetric efficiency of a vertical compression ignition engine ?

  16. A.
    inlet valve closing after bottom dead centre
    B.
    inlet valve closing before bottom dead centre
    C.
    inlet valve opening before top dead centre
    D.
    exhaust valve closing after top dead centre

  17. The pressure at the end of compression, in petrol engines, is approximately

  18. A.
    10 bar
    B.
    20 bar
    C.
    25 bar
    D.
    35 bar

  19. The sparking in a petrol engine increases pressure and temperature of the products of combustion, but the volume remains constant.

  20. A.
    Yes
    B.
    No