Correct option is C
Viscosity is the most important property of any lubricant because it determines the lubricant’s ability to reduce friction, prevent wear, and maintain a protective film between moving surfaces.
· Viscosity is the measure of a fluid’s resistance to flow.
· If the viscosity is too low, the lubricant may not provide adequate film thickness, leading to metal-to-metal contact and wear.
· If the viscosity is too high, it can cause excessive friction and energy losses.
· Proper viscosity ensures efficient lubrication, cooling, and protection of machine components.
