A good lubricant should have high _____________________ ?
Correct answer: C. Viscosity index
- A. Pour point
- B. Volatility
- C. Viscosity index
- D. None of these
Explanation
A high viscosity index means the lubricant's viscosity changes only slightly with temperature, allowing it to work over a broad temperature range. High volatility and high pour point are undesirable properties.
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