What is an example of a powered lifting system?

• A. A manual lever
• B. An electric hoist
• C. A block and tackle
• D. A hand winch

Answer: (B)

A powered lifting system refers to equipment that utilizes an external power source to perform lifting tasks, making the process more efficient and less reliant on manual effort. An electric hoist exemplifies this concept perfectly as it operates using electricity, allowing heavy loads to be lifted with minimal manpower. The use of a motor in the electric hoist facilitates not only lifting but also lowering loads smoothly and safely. This capability significantly reduces the physical strain on operators and enhances productivity in various lifting applications.

In contrast, manual levers, block and tackle systems, and hand winches are all examples of mechanical systems that require human effort to operate. These systems depend on the physical strength and mechanical advantage provided by their respective designs, but do not have any powered components that assist in the lifting process.