For an area to qualify for the classification of light hazard, what must the combustibles present meet?

The basis for an area to qualify as a light hazard classification is primarily rooted in the arrangement and quantity of combustibles present. The correct choice emphasizes that the combustibles must be arranged in a manner that minimizes the likelihood of fire spread. This involves ensuring that combustible materials are not stored in close proximity or in a manner that would facilitate quick ignition and propagation of flames.

This arrangement is crucial for maintaining a safer environment, as light hazard areas typically have low amounts of combustible materials, which are also of limited combustibility. A fire in such locations is expected to remain small and manageable, thus reducing the risk to life and property.

While portable fire extinguishers are essential in many environments, they are a secondary safety measure rather than a determining factor in the classification itself. The other options, focusing on intrinsic safety or hypergolic reactions, are not relevant to the criteria used to identify light hazard classifications. These concepts pertain to chemical reactions and material properties that do not directly correlate with the classification of fire hazards based on arrangement and potential fire spread.