1 Oil contaminants are classified as hard and soft Name the

1. Oil contaminants are classified as hard and soft. Name the subcategories of each classification.

Solution

Solution :

The subcategories of soft contaminants are

1. Oxidation products

2. Sludge

3. Additives which are depleted

The subcategories of hard contaminants are

1. Wear metals

2. Dust

3. Fibrous particles