A) 75%
B) 80%
C) 85%
D) 90%
Correct Answer: B
Solution :
\[{{h}_{1}}=3200\,\text{kJ/kg,}\] \[{{h}_{2}}=2300\,\text{kJ/kg,}\] \[{{h}_{2}}=2560\,\text{kJ/kg}\] \[{{\eta }_{1}}=\frac{{{h}_{1}}-{{h}_{2}}}{{{h}_{1}}-{{h}_{2}}}=\frac{3200-2560}{3200-2400}\] \[\frac{640}{800}=0.8\,\,\,or\,\,\,80%\]You need to login to perform this action.
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