🔍 Key Concepts

• Location and purpose of the scavenging air receiver on a slow-speed, two-stroke, crosshead engine • Where cylinder lubricating oil is applied versus where bearing/crosshead/turbocharger oil is contained • How oil that enters the scavenge space or receiver typically gets there

💭 Think About

• Think about which parts of the engine are directly exposed to the scavenge ports and space when the piston moves. • Which oil system is designed to be fed directly to the cylinder liners, and where does its excess normally drain? • Would turbocharger or bearing lubricating oil normally have a direct path into the scavenge air receiver, or would it be contained and drained elsewhere?

✅ Before You Answer

• Identify which oil system is meant to lubricate the cylinder liners and piston rings. • Identify which oil systems are largely confined to enclosed bearings/crossheads and not open to the scavenge space. • Confirm which oil would most reasonably show up when blowing scavenging air receiver drains.