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Lubrication: Identify the material commonly used as a dry lubricant. Consider layered structures that shear easily. Choose the correct material.

Q: Lubrication: Identify the material commonly used as a dry lubricant. Consider layered structures that shear easily. Choose the correct material.

Given data Task: Choose a lubricant material from common solids. Concept/Approach Graphite has layered sp2 sheets with weak interlayer forces; layers slide easily → excellent dry lubricant. Final Answer Graphite

Difficulty: Easy

Graphite
Silica
Iron oxide
Diamond

Correct Answer: Graphite

Explanation:

Given data

Task: Choose a lubricant material from common solids.

Concept/Approach
Graphite has layered sp² sheets with weak interlayer forces; layers slide easily → excellent dry lubricant.

Final Answer
Graphite

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