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Which risk increases within a closed Rankine cycle if feedwater heater efficiency degrades?

A)Decreased turbine blade stress range
B)Elevated condenser thermal load
C)Reduced cycle thermal efficiency
D)Improved pump cavitation margin

💡 Explanation

Increased condenser thermal load results because degraded feedwater heating increases moisture at the turbine exhaust; this is driven by conservation of energy, therefore increased heat rejection rather than higher-efficiency or altered blade stress under these operating constraints.

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