Which of the following is a common lubricant?
A) Water
B) Grease
C) Steam
D) Natural gas
Answer: B
Explanation: A) Incorrect. Oil and grease are common lubricants.
B) Correct. Oil and grease are common lubricants.
C) Incorrect. Oil and grease are common lubricants.
D) Incorrect. Oil and grease are common lubricants.
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