🔍 Key Concepts

• Function of oil deflector rings on rotating shafts • How lube oil is kept from escaping along a turbine shaft • Difference between oil control devices and devices that shape spray patterns or treat oil

💭 Think About

• Think about where an oil deflector ring is physically located on a turbine shaft and what problem it is meant to solve. • Consider whether a deflector ring’s primary job is to control the flow within the lubrication system, or to stop oil from going where it shouldn’t. • Ask yourself which of these choices describes a job usually done by other components, such as nozzles, spray bars, or purification systems, rather than a simple ring on a shaft.

✅ Before You Answer

• Identify which option directly relates to controlling oil migration along a rotating shaft. • Eliminate any options that describe shaping spray patterns, which are typically done by nozzles or orifices, not rings. • Eliminate any options that relate to cleaning or conditioning oil in the sump, which is normally handled by purifiers, filters, or separators, not shaft-mounted rings.