Which statement is true about combustible liquids' flashpoints?

Which statement is true about combustible liquids' flashpoints?

• A. Greater than 60°C and less than 93°C
• B. Less than 60°C
• C. Exactly 60°C
• D. Greater than 93°C

Answer: (A)

The key idea is how flashpoint relates to hazard level. The flashpoint is the lowest temperature at which a liquid’s vapors can form an ignitable mixture with air. Combustible liquids are those that require a higher temperature to produce enough vapor to ignite than flammable liquids do. In common safety classifications, combustible liquids have flashpoints that fall roughly between 60°C and 93°C. That means they ignite only at temperatures above 60°C but below 93°C, making them less hazardous than flammable liquids (which ignite below 60°C) but more hazardous than liquids with much higher flashpoints. The endpoints are often treated as boundaries, so the statement uses “greater than 60°C and less than 93°C” to reflect the typical range. If the flashpoint is below 60°C, the liquid would be considered flammable; if it’s above 93°C, it’s categorized differently in other safety schemes.

The key idea is how flashpoint relates to hazard level. The flashpoint is the lowest temperature at which a liquid’s vapors can form an ignitable mixture with air. Combustible liquids are those that require a higher temperature to produce enough vapor to ignite than flammable liquids do. In common safety classifications, combustible liquids have flashpoints that fall roughly between 60°C and 93°C. That means they ignite only at temperatures above 60°C but below 93°C, making them less hazardous than flammable liquids (which ignite below 60°C) but more hazardous than liquids with much higher flashpoints. The endpoints are often treated as boundaries, so the statement uses “greater than 60°C and less than 93°C” to reflect the typical range. If the flashpoint is below 60°C, the liquid would be considered flammable; if it’s above 93°C, it’s categorized differently in other safety schemes.