Exam Question
Write short notes on following with respect to lubricating oils.
(a) Base oil (4)
(b) Additive (4)
(c) Contaminants (4)
(d) Sampling & testing (4)
Class 4 (4th Engineer)
MEKG
📅 Jun 2023
Reference Answer
### (a) Base Oil
Base oil is the primary constituent of any lubricant, typically comprising 70-99% of the final product's volume. It serves as the solvent for the additive package and is responsible for the fundamental lubricating properties such as viscosity and lubricity.
**1. Classification and Types:**
Base oils are classified by the American Petroleum Institute (API) into five groups:
Base oil is the primary constituent of any lubricant, typically comprising 70-99% of the final product's volume. It serves as the solvent for the additive package and is responsible for the fundamental lubricating properties such as viscosity and lubricity.
**1. Classification and Types:**
Base oils are classified by the American Petroleum Institute (API) into five groups:
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