NEBOSH Practice Test

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Which classification of flammability indicates a flash point below 0 Celsius?

Flammable
Highly Flammable
Extremely Flammable
Non-Flammable

The correct answer is: Extremely Flammable

The classification indicating a flash point below 0 Celsius is "Extremely Flammable." This term is used to describe substances that can ignite easily at very low temperatures, posing significant fire hazards. A flash point is the lowest temperature at which a liquid can vaporize to form an ignitable mixture in air. When a substance has a flash point below 0 Celsius, it means that it can readily produce flammable vapors even in cold conditions, leading to a much higher risk of fire when exposed to an ignition source. Understanding these classifications is crucial for handling and storing chemicals safely, as it allows individuals to implement the necessary precautions and safety measures to prevent explosive atmospheres or accidental ignitions.