Certified Healthcare Safety Professional (CHSP) Practice Exam

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What defines a flammable liquid?

  1. A liquid with a flash point above 100°F

  2. A liquid with a flash point below 100°F

  3. A liquid with a vapor pressure above 2068 mmHg

  4. A liquid that does not ignite

The correct answer is: A liquid with a flash point below 100°F

A flammable liquid is characterized by having a flash point below 100°F (37.8°C). The flash point is the lowest temperature at which a liquid can vaporize to form an ignitable mixture in air. Liquids with flash points below this threshold are considered more hazardous because they can release enough vapor at relatively low temperatures to ignite if an ignition source is present. This classification is critical in safety protocols and regulations to manage risks associated with storage, handling, and potential exposure to fire hazards in various environments, particularly in healthcare settings. In contrast, a liquid with a flash point above 100°F would not be defined as flammable, while the vapor pressure criterion and the definition of ignitability do not solely determine flammability as defined by common standards. Thus, understanding the significance of the flash point is essential in assessing the risks associated with handling liquids in any setting.