Which of the following is NOT a required marking on hoists?

• A. Manufacturer
• B. Model number
• C. Rated load
• D. Serial number

Answer: (D)

The key idea here is understanding what information must be visibly marked on a hoist to ensure safe identification and operation. The marking that is not required is the serial number. On most safety standards, the markings that must appear on a hoist include the manufacturer’s name, the model number, and the rated load. The manufacturer’s name identifies who built the unit, which helps with sourcing parts and service. The model number specifies the exact design and capabilities of that unit, distinguishing it from other variants. The rated load shows the maximum safe working load, which is essential to prevent overload and protect people and equipment during use.

A serial number, while extremely helpful for tracking service history, warranty, and maintenance records, is not necessarily mandated as a required marking on the equipment plate by all standards. It can still be present for traceability, but it isn’t the marking that standards require for safe operation identification. Always check the specific standard applicable in your region, but in this context, serial number isn’t a required marking.