What do bearings do?

• A. Reduce engine torque
• B. Support rotating shafts and other moving parts
• C. Convert linear to rotary motion
• D. Absorb heat

Answer: (B)

Bearings provide support for rotating shafts and other moving parts, letting them turn smoothly while carrying loads and staying properly aligned. They’re all about reducing friction and wear so motion is efficient and reliable. They aren’t about converting motion from linear to rotary—that’s done by a mechanism like gears, pulleys, or cams. They also aren’t primarily about absorbing heat; heat management comes from proper cooling and lubrication, not the bearing’s main function. And they don’t reduce engine torque; torque is determined by the engine and drivetrain, while bearings mainly enable smooth, supported rotation.