HAZMAT Placards & Classes Flashcards
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Questions and Answers

The DOT has classified hazardous materials according to __________________

Their Primary Danger

Placards are approx ______ " placed on ____________ of ____________ and ________

11, all 4 sides, vehicles, large containers

Canadian and United Nations transport also use diamond-shaped placards.

True

What is Class 1?

<p>Explosives</p> Signup and view all the answers

What is the definition of Class 1?

<p>Any substance designed to function by explosion</p> Signup and view all the answers

What are the major hazards for Class 1?

<p>Thermal, Mechanical</p> Signup and view all the answers

What is Class 1 Division 1.1?

<p>Mass explosion hazard</p> Signup and view all the answers

What is Class 1 Division 1.2?

<p>Projection Hazard</p> Signup and view all the answers

What is Class 1 Division 1.3?

<p>Fire Hazard, liquid-fueled rocket motors, and propellant explosives</p> Signup and view all the answers

What is Class 1 Division 1.4?

<p>Minor explosion hazard</p> Signup and view all the answers

What is Class 1 Division 1.5?

<p>Mass explosion, little probability of initiation</p> Signup and view all the answers

What is Class 2 about?

<p>Gases</p> Signup and view all the answers

What are the major hazards of Class 2?

<p>Thermal, asphyxiation, chemical, mechanical</p> Signup and view all the answers

What is the flammable placard for Class 2?

Signup and view all the answers

What is the non-flammable placard for Class 2?

Signup and view all the answers

What is the oxidizer placard for Class 2?

<p>Yellow background Flaming 'O'</p> Signup and view all the answers

What is the poison gas placard for Class 2?

Signup and view all the answers

What is Class 2.1?

<p>Flammable Gases (propane)</p> Signup and view all the answers

What is Class 2.2?

<p>Non-flammable gas (Oxygen)</p> Signup and view all the answers

What is Class 2.3?

<p>Poisonous Gas (Phosgene)</p> Signup and view all the answers

What is Class 3?

<p>Flammable and Combustible Liquids</p> Signup and view all the answers

What are the major hazards of Class 3?

<p>Thermal, asphyxiation, chemical, mechanical</p> Signup and view all the answers

What is the definition for flammable liquid in Class 3?

<p>Any liquid having a flash point of no more than 141 F</p> Signup and view all the answers

What is the definition for combustible liquid in Class 3?

<p>Any liquid that has a flash point of above 142 F and below 200 F</p> Signup and view all the answers

What is Class 4?

<p>Flammable and Combustible Solids</p> Signup and view all the answers

What are the major hazards for Class 4?

<p>Thermal, chemical, mechanical</p> Signup and view all the answers

What is Class 4.1?

<p>Flammable Solid</p> Signup and view all the answers

What are the 3 subcategories of Class 4.1?

<p>Wetted explosives, self-reactive materials, readily combustible solids</p> Signup and view all the answers

What is Class 4.2?

<p>Spontaneously Combustible material</p> Signup and view all the answers

What are examples of Class 4.2?

<p>Pyrophoric materials, charcoal briquettes</p> Signup and view all the answers

What is Class 4.3?

<p>Dangerous when wet materials that come in contact with water liable to become spontaneously flammable</p> Signup and view all the answers

What is Class 5?

<p>Oxidizers</p> Signup and view all the answers

What are the major hazards for Class 5?

<p>Thermal &amp; mechanical</p> Signup and view all the answers

What is Class 6?

<p>Poison</p> Signup and view all the answers

What are the major hazards for Class 6?

<p>Chemical &amp; Thermal</p> Signup and view all the answers

What is Class 7?

<p>Radioactive materials</p> Signup and view all the answers

What are the major hazards of Class 7?

<p>Radiological</p> Signup and view all the answers

What is Class 8?

<p>Corrosives</p> Signup and view all the answers

What are the major hazards of Class 8?

<p>Chemical &amp; Thermal</p> Signup and view all the answers

What is Class 9?

<p>Miscellaneous</p> Signup and view all the answers

What is the definition for Class 9?

<p>A material that presents a hazard during transport but that is not included in another hazard class</p> Signup and view all the answers

What are examples of Class 9?

<p>PCB, molten sulfur</p> Signup and view all the answers

What does ORM-D stand for?

<p>Other regulated materials</p> Signup and view all the answers

What are examples of ORM-D?

<p>Consumer commodities, small arms ammo</p> Signup and view all the answers

Forbidden materials are prohibited from being offered or accepted for transportation.

<p>True</p> Signup and view all the answers

What are elevated temperature materials?

<p>A material that when offered for transport in bulk packaging meets one of the following: liquid above 212 F, liquid with flash point above 100 F transported above its flash point, solid at temp or above 464 F</p> Signup and view all the answers

What is the dangerous placard requirement?

<p>Has to be above 1001 lbs or mixed load</p> Signup and view all the answers

What does NFPA 704 represent?

<p>Fixed Sites - 0-4 (0 = Least, 4 = Most)</p> Signup and view all the answers

Study Notes

Hazardous Materials Classification

  • DOT classifies hazardous materials based on their primary danger.
  • Placards are approximately 11 inches, affixed to all four sides of vehicles and large containers.

Placard Shapes and Uses

  • Canadian and United Nations transportation also employ diamond-shaped placards.

Hazard Classes Overview

  • Class 1: Explosives, with definitions including any substance designed to function by explosion.

    • Major hazards include thermal and mechanical risks.
    • Divided into divisions with specific hazards: 1.1 (mass explosion), 1.2 (projection), 1.3 (fire), 1.4 (minor explosion), 1.5 (mass explosion with low initiation probability), 1.6 (extremely insensitive).

  • Class 2: Gases.

    • Major hazards include thermal, asphyxiation, chemical, and mechanical risks.
    • Subclasses: 2.1 (flammable gases, e.g., propane), 2.2 (non-flammable gases, e.g., oxygen), 2.3 (poisonous gases, e.g., phosgene), 2.4 (corrosive gases, e.g., anhydrous ammonia).

  • Class 3: Flammable and combustible liquids.

    • Definition of flammable: liquids with a flash point no more than 141°F.
    • Definition of combustible: liquids with flash points between 142°F and 200°F.
    • Major hazards include thermal, asphyxiation, chemical, and mechanical.

  • Class 4: Flammable and combustible solids.

    • Major hazards include thermal, chemical, and mechanical.
    • Subcategories: 4.1 (flammable solids), 4.2 (spontaneously combustible materials), 4.3 (dangerous when wet materials).

  • Class 5: Oxidizers.

    • Major hazards include thermal and mechanical.
    • 5.1 indicates oxidizers that may enhance combustion, while 5.2 denotes organic peroxides.

  • Class 6: Poison.

    • Major hazards include chemical and thermal.
    • Subclasses: 6.1 (toxic materials), 6.2 (infectious substances).

  • Class 7: Radioactive materials.

    • Major hazards are radiological.

  • Class 8: Corrosives.

    • Major hazards include chemical and thermal risks.
    • Defined as materials causing visible destruction upon contact.

  • Class 9: Miscellaneous.

    • Represents materials that present hazards during transport but do not fall into other classes.

Special Materials

  • ORM-D: Other regulated materials that present minimal hazard due to form, quantity, and packaging, with no assigned placard.
  • Forbidden materials: Prohibited from transportation with no placards as they aren't transported.
  • Marine pollutants adversely affect aquatic life.

Other Notable Information

  • Elevated temperature materials are defined as those transported above specific heat thresholds.
  • A dangerous placard applies when the weight exceeds 1001 lbs or indicates a mixed load.

Labels and Standards

  • NFPA 704: Fixed site identification system rated from 0 (least) to 4 (most hazardous).
  • EPA labels categorize hazards as Caution (minor), Warning (moderate), Danger (highest), and Poison (for highly toxic materials).
  • Military placards have specific guidelines distinct from civilian standards.

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Description

This quiz focuses on the classification and recognition of HAZMAT placards and classes as defined by DOT regulations. Test your knowledge with flashcards covering essential information about hazardous materials and their primary dangers. Perfect for those studying or working in hazardous materials handling.

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