What is the NFPA Standard referenced for fire extinguishers?

The correct answer is associated with NFPA Standard #10, which is specifically focused on the selection and installation of portable fire extinguishers. This standard provides crucial guidelines for how fire extinguishers should be chosen based on the types of hazards present, how they should be placed for accessibility, and the maintenance requirements to ensure effective operation in emergency situations. Proper understanding and adherence to this standard are vital for safety and compliance within any facility where fire hazards exist.

The other options relate to different aspects of fire protection and safety. For example, NFPA Standard #20 pertains to the installation of stationary pumps for fire protection, which are not portable extinguishers. NFPA Standard #50 focuses on the storage and handling of liquefied gases, relevant for other safety scenarios but not specifically for fire extinguishers. NFPA Standard #15, on the other hand, covers water spray fixed systems for fire protection, which is also not directly related to the guidelines for portable extinguishers. Understanding the specific focus of each NFPA standard helps in recognizing why NFPA Standard #10 is the appropriate choice here.