Which of the following is not a solid lubricant?

Which of the following is not a solid lubricant? Correct Answer Grease

With the use of lubricants, easy motion of the moving parts of a machine is facilitated. There are two types of lubricants – solid lubricants and liquid lubricants. Graphite, mica and soapstone are examples of solid lubricants while grease is a liquid lubricant.

Related Questions

A solid X is in thermal equilibrium with a solid Y. Solid Y has the same temperature as solid Z. If the three solids have different masses and compositions, which one of the following statements is correct? 
Which of the following is not a suitable solid lubricant?