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← TechnologyWhich limitation is encountered when using a screw pump to increase flow rate in highly viscous fluid?
A)Backflow increases due to reduced clearances✓
B)Cavitation risk due to elevated vapor pressure
C)Electromagnetic interference decreases motor capacity
D)Overheating worsens lubricant degradation
💡 Explanation
When viscosity impedes forward flow under high flow demand, fluid leaks back through clearances between the screw and casing due to viscous drag reducing net output. Therefore backflow increases, rather than cavitation, EMI issues, or lubricant issues which require different operating conditions such as high speeds or high pressures.
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