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Q2. The ratio of compression for an engine working on the otto cycle is 7: 1.

At the beginning of compression, the. temperature is 2°C with a pressure of 0.89 bar. The maximum cycle pressure is 18 bar.

(a) Sketch a pV and Ts graph of the cycle.

(b} Calculate EACH of the following:

(i} the temperature at all points

(ii) the air standard efficiency of the cycle

(iii} the thermal efficiency for the ideal Carnot cycle.

Note: For air C_v = O. 718 kJ/ kgK and C_p = 1.005 kJ/kgK