🔍 Key Concepts

• Observe the shape and stacking of the strainer elements shown at label C in the illustration. • Think about what type of element can be back‑flushed or cleaned by rotating or scraping, as suggested by the handle at the top (label A). • Consider what construction is rugged enough for reduction gear lube oil service with relatively high flow and pressure.

💭 Think About

• Look closely at whether the elements appear as sheets, braids, mesh, or solid pieces arranged in layers—what do you actually see drawn? • Which of the listed materials is normally associated with a self-cleaning, backflushing lube oil strainer rather than a disposable filter? • For gear lube oil on a mid‑size diesel, would the designer likely choose a delicate medium or something that can withstand contamination and repeated cleaning?

✅ Before You Answer

• Verify whether the illustrated elements show individual layers or disks with narrow gaps between them. • Confirm whether you see any paper-like or fabric-like texture in the drawing; if not, you can likely rule those options out. • Check if the exploded view on the right side clearly shows the strainer element as a stack of reusable rigid pieces rather than a soft or woven medium.