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FMCSA Commercial Driver's License - Test Reviews Sample Questions

Potassium cyanide is an example of what hazardous material class?

Correct Answer:

class 6.

the question asked is about the classification of potassium cyanide in the context of hazardous material classes. hazardous materials are classified into nine different classes according to their physical and chemical properties, and each class is further divided into divisions. these classes are designed to provide a systematic approach to controlling and managing hazardous substances.

the correct answer to the question is class 6. this class is divided into two categories: class 6.1 for toxic substances and class 6.2 for infectious substances. a toxic substance is defined as a substance that can cause death, injury or harm to human health if it is swallowed, inhaled, or by skin contact. an infectious substance, on the other hand, is a substance that contains viable microorganisms or their toxins which are known or suspected to cause disease in humans or animals.

potassium cyanide falls under class 6.1 - toxic substances. this is because potassium cyanide is a highly toxic compound that can cause death if ingested, inhaled, or absorbed through the skin. it is used in many industries, including mining, electroplating, and organic synthesis, but due to its high toxicity, it must be handled with extreme care. despite its dangerous nature, potassium cyanide is not classified as an infectious substance, so it does not fall under class 6.2.

the other classes mentioned in the question - class 5, 7, and 8 - refer to other types of hazardous materials. class 5 includes oxidizing substances and organic peroxides, class 7 includes radioactive materials, and class 8 includes corrosive substances. potassium cyanide does not fall into any of these categories. so, it is incorrect to classify potassium cyanide under these classes.

in conclusion, knowing the correct hazardous material class of a substance is essential for its safe handling, transportation, and disposal. it helps in taking appropriate safety measures and precautions to prevent any adverse effects on humans, animals, and the environment. therefore, potassium cyanide, due to its toxic nature, is classified under class 6 of hazardous materials.