Question 21Motor Plants - QMED70% to pass
As it applies to the combustion process associated with diesel engines, what is meant by the term "scavenging"?
AI Explanation
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.
Related Questions
#19 Which of the following statements concerning fire-tube boilers is correct? #20 Fusible plugs are installed in fire-tube boilers to _______________.#22 If a slow-speed two-stroke cycle diesel engine is fitted with exhaust valves located in the cylinder heads, what scavenging flow-pattern is utilized? #23 If a slow-speed two-stroke cycle diesel engine is fitted with scavenging air ports and exhaust ports located on opposite sides of the cylinder wall, what scavenging flow-pattern is utilized? #24 The power consumed during the scavenging process of a diesel engine is known as the _______________.