Which of the following cutting oil is used to prevent ‘clog’ in fine grinding?

Explanation:

• Sometimes called as chemical solutions, these fluids contain no oil but are a mixture of chemically dissolved in water to give lubricating and anti-corrosion properties.
• They form a clear transparent solution with water and are sometimes artificially colored.
• They are very useful in grinding operations, where, being, non-oily, they minimize clogging of the grinding wheel and are used at dilutions up to 1 in 80.
• As they are transparent, the operator can see the work, which is also important during grinding operations.