Machine-translated by Google. Questions are authored in English.
Top

Discussion

A high acid or neutralisation value in a used oil indicates

  • A.contamination with fresh base oil
  • B.an excess of viscosity index improver
  • C.a fall in the oil's operating temperature
  • D.oxidation of the oil in service

Answer: D

Oxidation produces organic acids that corrode bearing metals, so the value is monitored to decide when to change the charge. In an engine oil the reserve alkalinity is tracked instead, since the detergent is there to neutralise them.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.