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Railways NTPC (Technical Ability) Thermodynamics Question Bank Thermodynamics

  • question_answer
    An electric power generating station produces 400 MW. If the coal releases \[36\,\times \,{{10}^{8}}\] kJ/h of energy, the rate of rejection of heat from the power plant is:

    A) 200 MW                       

    B) 400 MW

    C) 600 MW                       

    D) 800 MW

    Correct Answer: C

    Solution :

    \[{{Q}_{1}}=\frac{36\times {{10}^{8}}}{3600\times {{10}^{3}}}=1000\,\,MW\] \[W\,\,=\,\,400\,\,MW\] \[{{Q}_{1}}-{{Q}_{2}}=W\] \[{{Q}_{2}}=1000-400=600\,\,MW\]


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