🔍 Key Concepts

• Purpose of mechanical cylinder lubricators on diesel engines • How lubrication needs change with engine load and speed • Difference between fixed and adjustable lubrication systems

💭 Think About

• Think about whether cylinder lubrication demand is the same at idle, part load, and full load, or if it changes. • Consider how a small reciprocating pump could be controlled to avoid both under‑lubrication and wasteful over‑lubrication. • Ask yourself which option would best protect the engine over a full operating day, not just at start or at peak load.

✅ Before You Answer

• Which options describe continuous vs. occasional operation? • Which choice allows lubrication rate to match changing engine conditions? • Eliminate any option that would obviously risk scuffing or excessive wear during normal running.