What is the purpose of engine oil in piston engine?

Question

Question PPL(A) - Private Pilot License - Aircraft General Knowledge

QuizVDS · Accepted Answer

Cooling, lubrication of the engine and disposal of fine abrasion

QuizVDS · Answer

Cooling of the engine and lubrication of propeller shaft.

QuizVDS · Answer

For nose reduction and bearing of the propeller shaft

QuizVDS · Answer

Cooling, lubrication and increasing engine performance.

PPL(A) EN: What is the purpose of engine oil in piston engine? Id: 128