🔍 Key Concepts

• Typical lubrication systems used on small high-speed diesel engines • Differences between splash lubrication and pressure lubrication • Where mechanical or sight-feed lubricators are more commonly found (older slow-speed or auxiliary machinery)

💭 Think About

• Think about engine speed: At very high RPM, what kind of lubrication gives the most reliable oil supply to fast-moving bearings? • Which system can ensure oil reaches all main and connecting rod bearings regardless of engine load and tilt? • Which options are more common on simple, low-speed, or older engines rather than modern high-speed diesels?

✅ Before You Answer

• Identify which method provides positive, forced oil flow to bearings • Eliminate methods mainly used for low-speed or open-type machinery • Ask: Which choice would you expect on a modern automotive-style or small marine diesel similar to a truck or car engine?