Question 21Motor Plants - QMED

The correct answer is D) Scavenging is the process of removing exhaust gases from the cylinder by blowing in fresh air. In a diesel engine, the scavenging process involves displacing the exhaust gases from the cylinder by introducing fresh air, typically through the use of a turbocharger or supercharger. This fresh air charge helps to expel the spent exhaust gases, preparing the cylinder for the next intake stroke and the subsequent combustion process. The other options are incorrect because they do not accurately describe the scavenging process. Option A refers to the cylinder filling process, which is distinct from scavenging. Option B involves pressurizing the fresh air charge, which is not a necessary part of the scavenging process. Option C describes the fresh air charge at atmospheric pressure, which does not capture the active removal of exhaust gases.