Question

Lubricating oil reaches a breakdown point at:

a) 80 degrees
b) 160 degrees
c) 240 degrees
d) 320 degrees

Answer 1

a) 80 degrees. The breakdown point for lubricating oil is 80 degrees.

Step-by-step explanation:

The breakdown point for lubricating oil is option a) 80 degrees. Viscosity, which refers to the resistance of a fluid to flow, decreases rapidly with increasing temperatures due to higher kinetic energy of the oil molecules. At higher temperatures, the attractive forces that prevent the oil from flowing are overcome, making the oil too thin to be an effective lubricant.