What does a Rated Capacity Indicator display and how does it assist crane operations?

• A. It shows wind speed and adjusts speed automatically.
• B. It displays the current rated capacity for the configured boom length and angle, helping avoid exceeding capacity.
• C. It displays operator hours for the day.
• D. It tracks maintenance schedules for components.

Answer: (B)

The main idea tested is how a Rated Capacity Indicator supports safe lifting by turning the crane’s current setup into a real-time safe lifting limit. It shows the current rated capacity for the configured boom length and angle, so you can compare the load’s weight with that number and know if it’s safe to lift. When you change the boom length or angle, the radius and overall capacity change, and the indicator updates to reflect the new limit. This helps prevent overloads that could cause tipping or structural stress because you’re always aware of the maximum you can lift in the present configuration. Some systems may also warn or limit hoist operation as you approach the limit, reinforcing safe decisions. It doesn’t track operator hours, maintenance schedules, or wind speed—those are handled by other parts of equipment monitoring.