Question

Which of the following is termed as the escape of the gasses from the combustion chamber and entering into the crankshaft?

(a) Scuffing

(b) Piston slap

(c) Buckling

(d) Blow-by

I had been asked this question by my school teacher while I was bunking the class.

The doubt is from Engine Components in division Basic Engine Components of Automotive Engine Design

Answer 1

Right answer is (d) Blow-by

Easiest explanation: Blow bye is the condition wherein the exhaust gasses escape from the combustion chamber and enter into the crankshaft and contamination of the oil takes place. To avoid this crankcase ventilation is provided.