Final answer:
The NFPA standard for portable fire extinguishers is NFPA 10, covering guidelines for their use, maintenance, and testing. The NFPA 704 system identifies chemical hazards, using a diamond symbol with color-coded sections rated on a scale from 0 to 4.
Step-by-step explanation:
The National Fire Protection Agency (NFPA) is referenced for portable fire extinguishers standards. More specifically, the NFPA 10 standard is the one that outlines guidelines for portable fire extinguishers. This includes selection, installation, inspection, maintenance, and testing of portable extinguishing equipment.
The NFPA also has the NFPA 704 Hazard Identification System which provides a readily recognized, easily understood system for identifying specific hazards and their severity. This system uses a diamond-shaped symbol with four colored sections, each representing a different type of hazard. The system rates each hazard on a scale from 0 to 4.
Fire extinguishers, for example, aid in combatting fires, such as those fought with fluorinated foam, which can spread across burning surfaces. The NFPA standards are essential in ensuring safety and proper fire fighting practices.