Question

Foaming of oils can be prevented by using ___________

(a) Despersants

(b) Foam inhibitors

(c) Rust inhibitors

(d) Oxide inhibitors

The question was asked during an interview for a job.

The doubt is from Types of Additives in chapter Lubricants of Applied Chemistry

Answer 1

Right answer is (b) Foam inhibitors

The explanation is: Foam inhibitors are used for preventing the foaming of oil in internal combustion engines. Methyl silicone polymers are used as effective foam inhibitors.they are not soluble in oil they help in breaking form bubbles.