Which of the following statements is CORRECT about stable lubrication?
1
Rise in the temperature leads to rise in the viscosity, decrease in the co-efficient of friction.
2
The viscosity and co-efficient of friction remain stable.
3
Rise in the temperature leads to decrease in the viscosity, decrease in the co-efficient of friction.
4
Rise in the temperature leads to decrease in the viscosity, increase in the co-efficient of friction.