A spark-ignition engine operates on the ideal Otto cycle. The air enters the engine at 101 kPa and 32 °C. The air is then compressed which increases the temperature to 467 °C. If the heat is rejected at a rate of 278.95 kJ/kg, determine the compression ratio of the cycle. Consider the variation of specific heat with temperature. О а. 15.2 O b. 8.96 c. 9.96 O d. 12.8 е. 5.6

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IC engines

The term "engine" indicates a mechanical device/machine used to convert input energy to a specific mechanical output. The input energy may be in the form of chemical energy, thermal energy, or so on and mechanical output is in the form of mechanical energy (work done). Generally, the engines classify into two groups which are internal combustion type and external combustion type, and further, these two types can be classified into two types that are reciprocating and rotary engines.