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← ScienceWhich risk increases when hydraulic fluid viscosity drops below specification?
A)Increased internal pump leakage✓
B)Reduced component flow coefficient
C)Increased system bulk modulus
D)Decreased control orifice sensitivity
💡 Explanation
Increased internal leakage occurs because reduced viscosity decreases fluid resistance, facilitating flow through clearances according to Poiseuille's equation; therefore leakage increases, rather than flow coefficient decreasing which requires higher viscosity.
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