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In a turbojet engine at altitude, which consequence results when air density decreases with a fixed fuel flow?

A)Increased turbine inlet temperature
B)Reduced compressor surge margin
C)Higher engine thrust produced
D)Lower exhaust gas speed

💡 Explanation

Reduced air density with constant fuel increases the fuel/air ratio, driving up temperatures due to incomplete combustion; this higher fuel flow increases turbine inlet temperature because heat release is not matched by airflow, therefore, over-temperature occurs, rather than thrust increase, surge, or velocity drop.

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