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← TechnologyWhich outcome occurs when a propeller-driven vessel operates at high speed in shallow water?
A)Propeller cavitation causing reduced thrust✓
B)Increased hydrodynamic drag on the hull
C)Engine overheating from increased load
D)Rudder stall reducing maneuverability
💡 Explanation
When water depth decreases around a fast-spinning propeller, suction increases, dropping local pressure below vapor pressure limit, thus inducing cavitation because the propeller is creating rapidly varying pressure zones. Therefore propeller cavitation and thrust reduction results, rather than drag increase, or rudder stall which require different mechanisms.
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