Question 22Motor Plants - QMED

The correct answer is C) Uniflow scavenging. In a slow-speed two-stroke cycle diesel engine with exhaust valves located in the cylinder heads, the scavenging flow-pattern utilized is uniflow scavenging. This is because the exhaust gases are expelled through the valves in the cylinder heads, while fresh air/fuel mixture is introduced through the ports in the cylinder walls, creating a unidirectional flow pattern from the intake ports to the exhaust valves. The other options are incorrect because cross-flow scavenging involves the intake and exhaust ports being located on opposite sides of the cylinder, return-flow scavenging has the intake and exhaust ports on the same side, and loop scavenging uses a more complex flow pattern with the intake and exhaust ports located in different positions.