Class 3 Flammable Liquids have a flashpoint of 60°C (140°F).

Class 3 Flammable Liquids have a flashpoint of 60°C (140°F).

• A. 60°C
• B. 0°C
• C. 20°C
• D. 100°C

Answer: (A)

Flashpoint is the temperature at which a liquid’s vapors can ignite in air with an ignition source. For Class 3 flammable liquids, the defining range is a flashpoint at or below 60°C (140°F). So a liquid with a flashpoint of 60°C sits right at that boundary, which is why it’s classified as Class 3. Values well below 60°C (like 0°C or 20°C) would indicate a more volatile liquid and would fall into a different, more hazardous subset under other classification schemes. A value above 60°C (such as 100°C) would indicate a liquid that requires a higher temperature to produce ignitable vapor and would not be Class 3.

Flashpoint is the temperature at which a liquid’s vapors can ignite in air with an ignition source. For Class 3 flammable liquids, the defining range is a flashpoint at or below 60°C (140°F). So a liquid with a flashpoint of 60°C sits right at that boundary, which is why it’s classified as Class 3.

Values well below 60°C (like 0°C or 20°C) would indicate a more volatile liquid and would fall into a different, more hazardous subset under other classification schemes. A value above 60°C (such as 100°C) would indicate a liquid that requires a higher temperature to produce ignitable vapor and would not be Class 3.