Final answer:
The NFPA standard for firefighter's professional qualifications, likely including knot-tying skills, is expected to be NFPA 1001. The NFPA 704 Hazard Identification System provides safety information about chemicals but is not related to knot-tying.
Step-by-step explanation:
The NFPA standard that lists the knots that firefighters need to know is not directly outlined in your materials, and therefore it would require specific knowledge of the NFPA codes and standards beyond the context provided. Commonly, the standards for firefighter's professional qualifications, which would include knowing various knots, are detailed in the NFPA 1001. This standard defines the necessary skills, such as knot-tying, that a firefighter must master to perform their duties safely and effectively.
The information provided regarding the NFPA 704 Hazard Identification System is indeed critical for firefighters to understand the potential hazards in a given emergency situation involving chemicals. However, it does not relate directly to the knots they must learn.