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Q:

Which of the following is the most important property of the lubricant?

A) Density B) Thermal conductivity
C) Viscosity D) Melting point
 
Answer & Explanation Answer: C) Viscosity

Explanation: Viscosity is the most important property of the lubricant. The viscosity of the oil at a given temperature and pressure must be compatible to ensure the hydrodynamic lubrication.

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