What diagram identifies the minimum allowable clearances between the load blocks and boom tip?

The correct answer is that the range diagram identifies the minimum allowable clearances between the load blocks and the boom tip. This type of diagram provides crucial information regarding the reach and positioning of the crane's boom in relation to the load it is handling.

The range diagram typically shows the various radii at which a crane can operate safely while lifting a specific load. By doing so, it ensures that the operator can maintain proper clearance and avoid potential collisions between the load blocks and the boom tip, which could lead to dangerous situations or equipment damage. Understanding and utilizing the range diagram is essential for safe crane operation, as it aids in planning lifts and ensures compliance with safety regulations.

The other options do not specifically address the aspect of clearance measurements. While the load diagram focuses on the maximum weight that can be lifted at different radii, and the safety diagram would cover safety protocols and measures, the operational diagram is more about the overall functioning of the crane rather than specific measurements related to clearances.