Mechanic Tests - Lubricants 2

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1) The major result of friction is:
2) The resistance between two objects lightly coated with oil or grease is called:
3) When an oil clings to a shaft and wedges between it and the bearing so that the shaft is supported entirely by the oil, it is called:
4) Society of Automotive Engineers establish the ratings for:
5) The American Petroleum Institute classification "CD" indicates: