What is the maximum load in kilograms for FB25 marked on the stacker?

The correct answer of 2500 kilograms for the FB25 marked on the stacker is based on the design and specifications of the forklift. The designation "FB25" typically indicates the nominal load capacity of the forklift model. In this case, the "25" in FB25 signifies that the machine is rated to safely lift and carry loads up to 2500 kilograms.

Forklifts are designed with specific load ratings to ensure stability and safety during operation. Each model has a unique capacity based on engineering factors such as lift height, stability, and load center. Therefore, when a forklift is marked with a capacity like FB25, it reflects the manufacturer's determined safe limit for handling loads, taking into account the strength of the materials and the design of the truck.

The other potential answers represent the load ratings for different models. If they were indicated as load capacities, they would not match the FB25's defined capacity, highlighting the significance of understanding model designations within the context of safe operation.