In terms of cutting fluids, what is the relation between water and oil in a 4 to 80 ratio?

The statement that presents a ratio of 4 to 80 for water and oil indicates a composition where the first number represents parts of one fluid and the second number represents parts of another. In the context of cutting fluids, a 4 to 80 ratio specifically means that for every four parts of water, there are eighty parts of oil. This ratio is significant because it describes the concentration of water in the mixture, which can affect the cooling and lubricating properties of the cutting fluid used in machining operations.

When water is mixed with oil in this way, it's common to create an emulsion, which helps to lubricate the cutting tool, reduce friction, and dissipate heat generated during cutting processes. The importance of the correct ratio is critical to ensure that the cutting fluid performs effectively and protects both the workpiece and the tool from damage.

In this particular case, the other answer choices do not correctly reflect the specified ratio. Recognizing the precise proportions is essential in machine design and machining operations, as they influence not only the efficiency of the cutting process but also the longevity of tools and the quality of the finished product.