Final answer:
The statement is true; fire symbols and chemical symbols, part of the NFPA 704 Hazard Identification System, may be displayed outside ammunition storage and facilities to indicate safety information about the stored materials.
Step-by-step explanation:
The statement that both fire symbols and chemical symbols may be posted outside ammunition storage and facilities is True. These symbols are part of the National Fire Protection Agency (NFPA) 704 Hazard Identification System, which is widely used to provide safety information about substances. This system includes symbols that detail fire hazard levels, health hazards, reactivity, and special hazards, with each being rated on a scale from 0 to 4, indicating the level of danger.
These symbols can serve as quick references for emergency responders or workers to assess the potential risks in case of an incident. Proper labeling with these symbols is crucial for maintaining safety in locations where hazardous materials such as ammunition are stored.