Which statement describes proper handling of combustible liquids?

Which statement describes proper handling of combustible liquids?

• A. Combustible liquids have a flash point at or above 100°F.
• B. Combustible liquids have a flash point below 100°F.
• C. Combustible liquids have a boiling point below 32°F.
• D. Combustible liquids have no vapor pressure.

Answer: (A)

The key idea is how flash point defines classification for liquids. The flash point is the lowest temperature at which a liquid’s vapors can form an ignitable mixture with air near an ignition source. Combustible liquids are those with a flash point at or above 100°F, which is why this statement correctly describes them. This classification guides safe handling and storage, since combustible liquids are less likely to ignite at room temperature than flammable ones, but still require keeping away from heat, open flames, and other ignition sources, using proper containers, ventilation, and grounding during transfers. The other statements don’t describe combustible liquids: a flash point below 100°F would indicate a flammable liquid; a boiling point below 32°F isn’t the criterion for this classification, and saying there is no vapor pressure isn’t accurate because all liquids produce some vapor.

The key idea is how flash point defines classification for liquids. The flash point is the lowest temperature at which a liquid’s vapors can form an ignitable mixture with air near an ignition source. Combustible liquids are those with a flash point at or above 100°F, which is why this statement correctly describes them. This classification guides safe handling and storage, since combustible liquids are less likely to ignite at room temperature than flammable ones, but still require keeping away from heat, open flames, and other ignition sources, using proper containers, ventilation, and grounding during transfers. The other statements don’t describe combustible liquids: a flash point below 100°F would indicate a flammable liquid; a boiling point below 32°F isn’t the criterion for this classification, and saying there is no vapor pressure isn’t accurate because all liquids produce some vapor.