Railways Technical Ability Internal Combustion Engine (ICE) Question Bank Internal Combustion Engine (ICE)

  • question_answer If the approximate average mean pressures during induction, compression, power and exhaust strokes of an internal combustion engine are respectively \[\text{15}\,\,\text{k}\,\text{N/}{{\text{m}}^{\text{2}}}\] below atmosphere 200\[k\,\text{N/m}\]  above atmosphere, \[\text{1000}\,\,\text{k}\,\text{N/}{{\text{m}}^{\text{2}}}\] above atmosphere and \[20\,\,\text{N/}{{\text{m}}^{\text{2}}}\] above atmosphere, then the resultant mean effective pressure, in \[k\,\text{N/}{{\text{m}}^{\text{2}}},\] is:

    A) 765                              

    B) 795

    C) 800                              

    D) 805

    Correct Answer: A

    Solution :

    Resultant m.e.p. \[=1000-200-\left( 15+20 \right)\]\[=765\,\text{kN/}{{\text{M}}^{\text{2}}}\]

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