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UPSC 2014 CDS II GK Paper
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Question : 23
Total: 120
Which of the following is a good lubricant ?
[2014 CDS-II]
Diamond powder
Graphite powder
Molten carbon
Alloy of carbon and iron
Validate
Solution:
Graphite powder is a good lubricant. It is a mineral made of loosely bonded sheets of carbon atoms, giving it a slippery texture that makes it a very effective lubricant.
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