Multiple choice general knowledge science & technology

Starting friction is low in

  1. a)hydrostatic lubrication

  2. b)hydrodynamic lubrication

  3. c)Semi-fluid/Mixed lubrication

  4. d)Boundary lubrication
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Hydrostatic lubrication maintains a complete fluid film even at zero speed by externally pressurizing the lubricant, giving very low starting friction. Hydrodynamic lubrication relies on relative motion to generate pressure film, so starting friction is higher.

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