Question

which of the following is not true regarding flammable liquids?

• flammable liquids have a flashpoint at or below 199.4 °f (93 °c)
• the vapor is more easily ignited than the liquid itself
• flammable liquids are safe to store in open containers as long as they are kept away from ignition sources
• flammable liquids are divided into four categories

Explanation:

Analyze OSHA flammable liquid definitions and categories

Under OSHA standard 29 CFR 1910.106, a flammable liquid is defined as any liquid having a flashpoint at or below \(199.4\text{ }^{\circ}\text{F}\) (\(93\text{ }^{\circ}\text{C}\)). These liquids are divided into four categories (Category 1 through Category 4) based on their flashpoints and boiling points.

Evaluate vapor ignition characteristics

It is the vapor of the flammable liquid, rather than the liquid itself, that burns and is easily ignited when mixed with air in the proper proportions.

Evaluate storage safety requirements

Storing flammable liquids in open containers is highly unsafe, even if kept away from ignition sources. Open containers allow volatile vapors to escape, accumulate, and travel to distant ignition sources, creating a severe fire and explosion hazard.

Answer:

• (A) Flammable liquids have a flashpoint at or below 199.4 °F (93 °C)
• (B) The vapor is more easily ignited than the liquid itself
• (C) Flammable liquids are safe to store in open containers as long as they are kept away from ignition sources (Correct answer)
• (D) Flammable liquids are divided into four categories