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CSS Solved Papers
Physics Chemistry

Engineering :: Heat Engines


  Thermal efficiency of a spark ignition engine at full load usually is in the range
[A]. 70 to 90 percent[B]. 50 to 70 percent
[C]. 30 to 35 percent[D]. 10 to 25 percent
[E]. 5 to 10 percent    

Answer: Option C


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