Which condition dramatically reduces a centrifugal pump's performance during oil-pipeline transfer?

💡 Explanation

Increasing the oil viscosity significantly increases frictional losses in the pump because viscous drag becomes dominant; therefore, pump efficiency reduces rather than improves if the fluid flows easier at lower kinematic viscosity due to lubrication.

• Which consequence results when inductive energy causes voltage spikes in a switching circuit?
• Which risk increases when improperly supported rebar cages are dropped during concrete pouring operations?
• Which airflow condition initiates compressor surge in gas turbine engines?
• Which outcome occurs when harmonic currents overload reactor circuits in a three-phase distribution system?
• Which failure is more probable when a high-voltage direct current (HVDC) transmission line accumulates ice?
• Which outcome occurs when a transformer breaker fails in an open state?