TCFP Plans Examiner Practice Test

What hazard is associated with the use of Class I liquids?

1. Low flash point

2. High vapor pressure

3. Both A and B

4. None of the above

The correct answer is: Both A and B

Class I liquids are characterized by both a low flash point and a high vapor pressure, which together create significant hazards during storage and handling. A low flash point means that the liquid can ignite at relatively low temperatures, making it particularly dangerous in environments where heat sources, sparks, or open flames are present. This property increases the risk of fire and explosion, as the vapors can ignite easily. High vapor pressure indicates that the liquid readily evaporates at normal temperatures, leading to the release of flammable vapor into the atmosphere. This can create an additional hazard as these vapors can accumulate and form explosive mixtures with air, further increasing the risk of fire or explosion. Due to these combined characteristics, Class I liquids present a higher level of danger in terms of flammability and require stringent safety precautions during handling, storage, and transportation. Thus, selecting the option that includes both a low flash point and a high vapor pressure accurately reflects the hazards associated with Class I liquids.