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← ScienceIn high-speed fuel injectors, which risk escalates when fuel temperature falls below a threshold?
A)Viscosity increases, impeding atomization✓
B)Fluid pressure increases uncontrollably
C)Fuel density decreases dramatically
D)Combustion efficiency reaches optimum value
💡 Explanation
Lower temperatures elevate fuel viscosity; therefore, turbulence decreases as Reynolds number drops—a mechanism of laminarization—because inertial forces diminish rather than the fluid mixing effectively under cavitation conditions at higher thresholds of energy.
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