describe a light machine oil and state its content and properties?

Answer 1

A light machine oil is going to be lower viscosity than other oils. Its oil so that it doesn't dry out like water or glycerin would.

The reason for low viscosity is better flow and wetting and less mess (machine oil spreads thinner and coats thinner, so there is less to clean up).

Usually a petroleum distillate of some weight a little heavier than kerosene.