Final answer:
The NFPA Hazard Rating System uses colors and numbers to signify warnings based on different hazard levels.
Explanation:
True, the National Fire Protection Association's color and number method is used to signify a warning to employees. The NFPA Hazard Rating System uses a diamond-shaped label with four color-coded squares to indicate different hazard levels ranging from 0-4, with 0 being the least severe and 4 being the most severe.
Learn more about National Fire Protection Association (NFPA) Hazard Rating System here:
https://brainly.com/question/48591633
