Q 1 In an air standard Diesel Cycle, the compression ratio is 14, the pressure and temperature at the beginning of compression are: 1 bar and 28°C, respectively. Heat is added until the temperature at the end of constant- pressure process is 1453°C. Calculate the heat supplied in, kJ/kg of airS Q 2 At the beginning of compression in an air- standard Diesel Cycle, P₁=1 bar, V₁= 0.015 m³, and T₁= 18°C. The compression ratio is 16 and the maximum temperature is 1095°C. Determine the cut-off ratio (rc). Q 3 At the beginning of compression in an air-standard Diesel Cycle, P₁=1.0 bar, V₁= 0.015 m³, and T₁= 319 K. The compression ratio is 17.7 and the maximum temperature is 1443 K. Determine the net work, in kJ. Q 4 An air-standard dual cycle has a compression ratio of 14, and compression begins at 100 kPa, 25°C. The maximum pressure is 79 bar. The heat transferred to air at constant pressure is equal to that at constant volume. Estimate the cycle efficiency, in %.