Medium viscosity lubricating oil can be most ideally pumped by a ______________ pump?
Correct answer: B. Vane
- A. Piston
- B. Vane
- C. Centrifugal
- D. Plunger
Explanation
A vane pump handles liquids of moderate viscosity smoothly and gives nearly continuous flow, making it suitable for medium-viscosity lubricating oil. Centrifugal pumps are more appropriate for low-viscosity liquids, while piston and plunger pumps are generally selected for high pressure or metering duties.
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