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← ScienceWhich risk increases when a pump's inlet pressure diminishes below its design limits?
A)Increased impeller stress fractures✓
B)Elevated motor winding temperatures
C)Increased downstream flow velocity
D)Reduced pipe wall corrosion
💡 Explanation
Increased impeller stress fractures occur because cavitation arises when low pressure causes fluid vaporization; the vapor bubble collapse creates shockwaves on the impeller surfaces. Therefore, mechanical stress elevates, rather than better performance or pipe condition because lower pressure increases void formations.
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