Which conveyor system has unpowered rollers?

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Multiple Choice

Which conveyor system has unpowered rollers?

Explanation:
Gravity conveyors move items without a motor because the rollers spin freely and gravity provides the driving force. The load on an incline or the push from upstream causes the products to roll along the rollers, so the rollers themselves aren’t powered by a drive motor. That’s what makes this system have unpowered rollers. The other options rely on powered components: a powered roller conveyor has motor-driven rollers, a belt conveyor uses a motor to move a belt, and a chain conveyor uses motor-driven chain. Gravity conveyors are chosen for simple, low-cost handling where minimal automation is needed.

Gravity conveyors move items without a motor because the rollers spin freely and gravity provides the driving force. The load on an incline or the push from upstream causes the products to roll along the rollers, so the rollers themselves aren’t powered by a drive motor. That’s what makes this system have unpowered rollers. The other options rely on powered components: a powered roller conveyor has motor-driven rollers, a belt conveyor uses a motor to move a belt, and a chain conveyor uses motor-driven chain. Gravity conveyors are chosen for simple, low-cost handling where minimal automation is needed.

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