While having a discussion, Technician A says that the noise from spark knock is caused by the vibration of the combustion chamber walls. Technician B says that it is caused by low volatility. Who is correct?
A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question

Quizplus · Accepted Answer

Technician A is correct because spark knock, also known as pre-ignition or detonation, indeed causes the combustion chamber walls to vibrate, producing a knocking noise. This phenomenon is not directly caused by low volatility of the fuel, which affects how easily the fuel vaporizes, not the vibration of combustion chamber walls.

While Having a Discussion, Technician a Says That the Noise