Understanding the UN Hazardous Materials Classification Quiz

1. What is the class for explosives?

Class 2-Gases

Class 1-Explosives

Class 4-Flammable Solids

Class 3-Flammable Liquids

Explosives are classified as Class 1 in the hazardous materials regulations, which includes materials and substances that are likely to cause an explosion. Class 2 consists of gases, Class 3 includes flammable liquids, and Class 4 includes flammable solids.

Explanation

Explosives are classified as Class 1 in the hazardous materials regulations, which includes materials and substances that are likely to cause an explosion. Class 2 consists of gases, Class 3 includes flammable liquids, and Class 4 includes flammable solids.

2. What class of fire is represented by Class 3-Flammable Liquids?

Class 1-Ordinary Combustibles

Class 3-Flammable Liquids

Class 4-Flammable Solids

Class 2-Combustible Solids

Class 3 fires involve flammable liquids and liquid-based materials that ignite with extreme ease. These materials have a flash point below 100°F (37.8°C) and a boiling point above 100°F (37.8°C).

Explanation

Class 3 fires involve flammable liquids and liquid-based materials that ignite with extreme ease. These materials have a flash point below 100°F (37.8°C) and a boiling point above 100°F (37.8°C).

3. What is the correct class for flammable solids according to the UN classification?

Class 4-Flammable solids

Class 3

Class 2

Class 1

The correct classification for flammable solids according to the UN is Class 4, which includes substances that are liable to spontaneous combustion and are dangerous when wet.

Explanation

The correct classification for flammable solids according to the UN is Class 4, which includes substances that are liable to spontaneous combustion and are dangerous when wet.

4. Which hazard class includes chemicals that are considered oxidizers or organic peroxides?

Class 1-Explosives

Class 5-Oxidizers/Organic Peroxides

Class 8-Corrosive Substances

Class 3-Flammable Liquids

Class 5 includes chemicals that are capable of significantly increasing the burning rate of combustible materials they come into contact with, making them hazardous due to potential fire risks. This class covers oxidizers and organic peroxides, which can pose serious safety risks if not handled properly.

Explanation

Class 5 includes chemicals that are capable of significantly increasing the burning rate of combustible materials they come into contact with, making them hazardous due to potential fire risks. This class covers oxidizers and organic peroxides, which can pose serious safety risks if not handled properly.

5. What class of chemicals are considered corrosives?

Class 1 - Explosives

Class 3 - Flammable Liquids

Class 8-Corrosives

Class 6 - Toxic Substances

Corrosives are chemicals that can cause visible destruction or irreversible alterations in human skin tissue at the site of contact. They are categorized under Class 8.

Explanation

Corrosives are chemicals that can cause visible destruction or irreversible alterations in human skin tissue at the site of contact. They are categorized under Class 8.

6. Which class of hazardous materials is most commonly associated with the label 'Class 9-Misc. Hazardous Materials'?

Class 5-Oxidizing Substances

Class 7-Radioactive Materials

Class 9-Misc. Hazardous Materials

Class 3-Flammable Liquids

Class 9-Misc. Hazardous Materials is a catch-all category for hazardous materials that do not fall into any of the other classes specified by the UN. It includes materials that possess a hazard not covered by other classes, such as environmentally hazardous substances.

Explanation

Class 9-Misc. Hazardous Materials is a catch-all category for hazardous materials that do not fall into any of the other classes specified by the UN. It includes materials that possess a hazard not covered by other classes, such as environmentally hazardous substances.

7. Which class of materials are subject to rules?

Class 3-Flammable Liquids

Class 1-Explosives

Class 7-Radioactive Materials

Class 2-Gases

Rules pertain to handling and transportation of Class 7-Radioactive Materials as per international standards.

Explanation

Rules pertain to handling and transportation of Class 7-Radioactive Materials as per international standards.

8. What is the class of gases that includes carbon dioxide, methane, and nitrous oxide?

Class 5 - Oxidizing Agents

Class 4 - Flammable Solids

Class 3 - Flammable Gasses

Class 2-Gasses

The correct classification for gases like carbon dioxide, methane, and nitrous oxide is Class 2 - Gasses as per international regulations for the transportation of dangerous goods.

Explanation

The correct classification for gases like carbon dioxide, methane, and nitrous oxide is Class 2 - Gasses as per international regulations for the transportation of dangerous goods.

9. What is the classification of the substance?

Class 9 - Miscellaneous

Class 6-Toxic

Class 3 - Flammable

Class 8 - Corrosive

The correct classification for the substance is Class 6 - Toxic as it indicates that the substance is harmful if it is ingested, inhaled, or comes into contact with skin. Class 3 - Flammable, Class 8 - Corrosive, and Class 9 - Miscellaneous are not the correct classifications for a toxic substance.

Explanation

The correct classification for the substance is Class 6 - Toxic as it indicates that the substance is harmful if it is ingested, inhaled, or comes into contact with skin. Class 3 - Flammable, Class 8 - Corrosive, and Class 9 - Miscellaneous are not the correct classifications for a toxic substance.