Question

In mineral lubricating oils, bubble towers are used for fractionalisation of oil into two or three fractions of different viscosities.

(a) True

(b) False

The question was asked during an internship interview.

My question is taken from Types of Lubricants topic in section Engine Friction and Lubrication of IC Engine

Answer 1

The correct answer is:

(a) True

In the refining process of mineral oils, bubble towers (or fractional distillation columns) are indeed used to separate the oil into different fractions based on viscosity. This process helps to create oils with varying viscosities for different applications, ensuring that the lubricating oils meet the required specifications for engines and machinery.