🔍 Key Concepts

• Ball and roller antifriction bearings purpose in machinery • Difference between reducing friction vs increasing resistance • Types of loads bearings are designed to carry: radial, axial, and shock (overload) loads

💭 Think About

• For each option, ask yourself: does this describe something bearings are designed to DO, or something they are designed to AVOID? • Think about what "antifriction" means in terms of rotational motion and resistance. • Consider which functions are common, desirable characteristics in high‑speed gas turbine engine (GTE) rotors, and which would be harmful.

✅ Before You Answer

• Verify which choices describe benefits of antifriction bearings (what engineers want from them). • Identify if any option describes an effect that would worsen efficiency or increase wear on a high‑speed rotor. • Check which loads (axial, radial, momentary overloads) high‑quality bearings are specifically designed to handle in rotating machinery like a GTE.