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← ScienceWhich inefficiency arises in a Brayton cycle gas turbine?
A)Isentropic compression heats intake air✓
B)Friction reduces compressor output pressure
C)Regeneration efficiency limits heat rejection
D)Incomplete cooling affects turbine operation
💡 Explanation
Isentropic compression heats incoming air due to adiabatic processes, therefore elevated input temperature reduces the overall thermal efficiency because less combustion occurs for the same energy output, rather than pressure losses from friction, which impacts efficiency differently.
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