Hazmat Classes and Divisions

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Questions and Answers

What hazard class do explosives fall under?

Hazard Class Four

Hazard Class Three

Hazard Class One (correct)

Hazard Class Two

What is the primary hazard presented by Class 1.1 explosives?

Mass explosion hazard

What type of hazard do Class 1.2 explosives present?

Projection hazard

What are examples of Class 1.3 explosives?

Liquid-fueled rocket motors, smokeless powder, practice grenades, aerial flares Signup and view all the answers

What safety characteristic defines Class 1.4 explosives?

Present no significant hazard beyond the package Signup and view all the answers

What is an example of a Class 1.5 explosive?

Mixture of prilled ammonium nitrate fertilizer or fuel oil (ANFO) Signup and view all the answers

What defines Class 1.6 explosives?

Extremely insensitive materials with no mass explosion hazard Signup and view all the answers

What hazard class do gases fall under?

Hazard Class Two Signup and view all the answers

What is an example of a Class 2.1 material?

Compressed hydrogen Signup and view all the answers

What defines Class 2.2 materials?

Non-flammable, non-toxic gases Signup and view all the answers

Class 3 is associated with which type of materials?

Flammable/Combustible liquids Signup and view all the answers

What is the flash point of a flammable liquid?

Not more than 140ºF (60ºC) Signup and view all the answers

What characterizes a combustible liquid?

Flash point above 140ºF and below 200ºF Signup and view all the answers

What hazard class do solids fall under?

Hazard Class Four Signup and view all the answers

What is one example of a flammable solid?

Phosphorus heptasulfide Signup and view all the answers

What materials are classified as spontaneously combustible?

Pyrophoric materials and self-heating materials Signup and view all the answers

What characterizes Class 4.3 materials?

Dangerous when wet Signup and view all the answers

What does Hazard Class 5 encompass?

Oxidizing solids Signup and view all the answers

Study Notes

Explosives (Hazard Class One)

Class 1 explosives present mass explosion hazards affecting nearly the entire load instantly.
Class 1.1 examples: dynamite, mines, wetted mercury fulminate.
Class 1.2 explosives present projection hazards; examples include detonation cord, bursting charge rockets, flares, and fireworks.
Class 1.3 explosives primarily pose fire hazards with minor blast or projection hazards; examples: liquid-fueled rocket motors, smokeless powder.
Class 1.4 explosives have no significant hazard beyond the package; examples: signal cartridges, cap type primers, igniter fuses.
Class 1.5 explosives are insensitive with a mass explosion hazard; example includes ammonium nitrate fuel oil (ANFO) mixtures.
Class 1.6 explosives consist of extremely insensitive materials with negligible risk of accidental initiation; examples: low vulnerability military weapons.

Gases (Hazard Class Two)

Class 2.1 includes flammable gases such as compressed hydrogen, isobutene, methane, and propane.
Class 2.2 covers non-flammable, non-toxic gases; examples: carbon dioxide, helium, refrigerated liquid nitrogen.
Class 2.3 encompasses toxic gases posing health hazards; examples: cyanide, diphosgene, phosphine, hydrocyanic acid.

Flammable/Combustible Liquids (Hazard Class Three)

Flammable liquids have flash points of no more than 140ºF (60ºC); examples: gasoline, methyl alcohol, acetone.
Combustible liquids have flash points between 140ºF (60ºC) and 200ºF (93ºC); example: fuel oil #6.

Solids (Hazard Class Four)

Class 4.1 includes flammable solids like wetted explosives and self-reactive materials; examples: phosphorus heptasulfide, magnesium alloys.
Class 4.2 covers spontaneously combustible materials; examples: sodium sulfide, phosphorus (white or yellow).
Class 4.3 consists of water-reactive materials that produce flammable or toxic gases upon contact with water; examples: magnesium powder, lithium, calcium carbide.

Oxidizing Solids (Hazard Class Five)

This class includes materials that can yield oxygen and support combustion.

In Summary

Understanding the hazard classes and divisions is crucial for the safe handling and transportation of dangerous materials.
Each class and division has specific characteristics and examples that illustrate their dangers and required precautions during handling.

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Description

This quiz focuses on the various classes and divisions of hazardous materials, specifically exploring explosives and their classifications. Learn to identify the definitions and examples associated with Hazmat Class One and its subcategories. Perfect for students and professionals in the field of safety and environmental studies.