General Studies · Lubricants and Coolants
Which of the following serves as an excellent lubricant for heavy-duty machining under extreme pressure conditions?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Sulphurised oils
- 2Fatty acid
- 3Soluble mineral oils
- 4Lard oils✓
Correct answer
Lard oils
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