An ideal air-standard diesel engine has a compression ratio of 14 ∶ 1. The state of air at the beginning of the compression stroke is 400 kPa and 400 K. The highest temperature during the cycle is 1500 K. Assume air to be an ideal gas with constant specific heats. The gas constant of air is R = 0.287 kJ/kg-K and specific heat at constant volume cv = 0.717 kJ/kg-K. Air temperature at the end of the compression stroke is

An ideal air-standard diesel engine has a compression ratio of 14 ∶

1.	An ideal air-standard diesel engine has a compression ratio of 14 ∶ 1. The state of air at the beginning of the compression stroke is 400 kPa and 400 K. The highest temperature during the cycle is 1500 K. Assume air to be an ideal gas with constant specific heats. The gas constant of air is R = 0.287 kJ/kg-K and specific heat at constant volume cv = 0.717 kJ/kg-K. Air temperature at the end of the compression stroke is
A.	1050 K
B.	1500 K
C.	1149.51 K
D.	560 K
Answer» D. 560 K

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