Final answer:
Portable fire extinguishers must be located at a distance governed by safety regulations, typically not exceeding 75 feet from fuel-oil fired equipment. The exact placement depends on fire hazard classifications and local fire codes.
Step-by-step explanation:
The question pertains to the required placement of portable fire extinguishers in relation to fuel-oil fired equipment. The specific distance is not provided in the question, and it would typically be governed by safety regulations, such as those from the Occupational Safety and Health Administration (OSHA) or local fire codes. However, a common standard requires extinguishers to be within a certain travel distance, often not exceeding 75 feet, but this distance can vary based on the type and size of the extinguisher, and the type of fire hazard. Understanding the classification of fire hazards is crucial for determining the correct type and placement of fire extinguishers. The flash points provided, ranging from 4 for materials with flash points below 73 °F to 0 for materials that will not burn, guide the categorization of fire risks associated with various substances. Ensuring that an appropriate fire extinguisher is readily accessible and located not more than the legally required distance from the equipment is vital for effective fire emergency response in any laboratory or industrial setting.