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← ScienceWhich risk increases during steam turbine operation when condenser vacuum degrades?
A)Reversed blade bending stress
B)Increased water droplet erosion✓
C)Reduced main bearing lubrication
D)Accelerated rotor creep deformation
💡 Explanation
Increased water droplet erosion occurs because decreased condenser vacuum elevates the temperature at the turbine exhaust causing increased moisture formation via steam expansion, therefore leading to more erosion rather than creep because temperature constraints change.
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