Free CDL Hazardous Materials (HazMat) Endorsement Questions and Answers — Questions and Answers

Question 1: What qualifies the hazardous material being transported? Manifests, bills of lading, and shipping orders are all regarded as belonging to this category.

Correlation table
Hazmat index
Hazardous identifier
Shipping paper (Correct answer)

Correct answer: Shipping paper

The term that describes shipping orders, bills of lading, and manifests as well as other documents that describe hazardous materials being transported is "shipping paper." Shipping papers are required by the U.S. Department of Transportation's Hazardous Materials Regulations (HMR) and are used to provide important information about the hazardous materials being shipped, as well as the methods of shipment and handling. Shipping papers must accompany hazardous materials during transportation, and they provide essential information for emergency responders in case of any incidents or accidents during transportation.

Question 2: What is the name of the four-digit code that first responders use to identify hazardous materials and which is preceded by the letters "NA" or "UN"?

Hazmat approval number
Hazard class
Chemical composition
Identification number (Correct answer)

Correct answer: Identification number

The four-digit code preceded by the letters "NA" (for North America) or "UN" (for the United Nations) which is used by first responders to identify hazardous materials is called the identification number. The identification number is assigned to each hazardous material based on its chemical composition, physical characteristics, and potential hazards. The identification number is used on shipping papers, labels, and placards to identify the hazardous material being transported. It is also used by first responders to quickly identify the hazardous material and take appropriate actions in case of any incidents or accidents.

Question 3: Which of the following ways must the hazardous materials be listed if a shipping paper lists both hazardous and non-hazardous goods?

The hazardous materials must be identified by an “X” placed before the shipping name in a column captioned “HM.” The letters “RQ” may be used instead of “X” if a reportable quantity is present in one package
The hazardous materials must be highlighted in a contrasting color
The hazardous materials must be described first
All of the above (Correct answer)

Correct answer: All of the above

Hazardous materials must be listed in one of the following ways if a shipping paper lists both hazardous and non-hazardous goods: first described colored differently to stand out It can be recognized by an "X" before the shipping name in the "HM" column. If a reportable quantity is present in a package, the letter "RQ" may be used in place of the letter "X."

Question 4: A manual on how to protect oneself and the public from hazardous materials is available from the Department of Transportation for use by firefighters, police officers, and industry employees. What is it called?

Commercial Driver's Hazardous Response Guide
Emergency Response Guidebook (Correct answer)
Guide To Hazardous Materials Handling And Response
Hazardous Materials Driver Regulations Manual

Correct answer: Emergency Response Guidebook

A manual on how to protect oneself and the public from hazardous materials is available from the Department of Transportation for use by firefighters, police officers, and industry employees. By proper shipping name and hazardous materials identification number, the guide is indexed. These items are searched for by emergency personnel on the shipping paper. It is crucial that the shipping name, identification number, label, and placards are accurate for this reason.

Question 5: How many feet must you leave between your truck and an open flame when parking it with hazardous materials inside?

50 ft
100 ft
200 ft
300 ft (Correct answer)

Correct answer: 300 ft

According to the U.S. Department of Transportation's Hazardous Materials Regulations (HMR), a truck containing hazardous materials must not be parked within 300 feet from an open flame or other sources of ignition. This requirement is outlined in 49 CFR § 177.834, which specifies the conditions for parking and storing hazardous materials in a safe and secure manner. The purpose of this requirement is to minimize the risk of fire or explosion in case of any leakage or release of hazardous materials from the truck.

Question 6: All railroad crossings require a stop, EXCEPT when:

Your vehicle carries less than a reportable quantity of hazardous materials (Correct answer)
Your vehicle has cargo tanks, whether loaded or empty, used for hazardous materials
Your vehicle carries any amount of chlorine
Your vehicle is placarded

Correct answer: Your vehicle carries less than a reportable quantity of hazardous materials

When approaching a railroad crossing, stop your car if it: has a placard carries any chlorine content has cargo tanks that are used for hazardous materials, whether they are loaded or empty Between 15 and 50 feet before the closest rail, you must stop. Only move forward when you can clear the tracks without stopping and are certain there is no approaching train. When crossing the tracks, avoid changing gears.

Question 7: To determine which materials are hazardous, there are three main lists. One of those lists is which of the following?

Section 172.101: Hazardous Materials Table
Appendix B to Section 172.101: List of Marine Pollutants
Appendix A to Section 172.101: List of Hazardous Substances and Reportable Quantities
All of the above (Correct answer)

Correct answer: All of the above

When trying to identify hazardous materials, shippers, carriers, and drivers primarily use three lists. Look for a material's name on three lists before transporting it. Some items appear on all lists, while others only appear on one. Always look over the lists below: Table of Hazardous Materials, Section 172.101 List of Hazardous Substances and Reportable Quantities, Appendix A to Section 172.101 List of Marine Pollutants in Appendix B to Section 172.101.

Question 8: The following symbol: What does it mean?

Icy conditions
Cold storage required (freezing point of water or below)
Low temperature or cryogenic hazard (Correct answer)
Dangerous when frozen

Correct answer: Low temperature or cryogenic hazard

This symbol warns of a low-temperature or cryogenic hazard, typically associated with liquefied gases that can cause severe frostbite or freeze burns on contact. The other options describe ordinary cold conditions or storage instructions rather than the specific cryogenic danger the pictogram signals.

Question 9: Which of the following phrases best describes the most dangerous substance?

Hazard
Caution
Warning
Danger (Correct answer)

Correct answer: Danger

The phrase "Danger" best describes the most dangerous substance. The word "danger" is a warning term used to indicate that something poses a significant risk or potential harm to people, property, or the environment. In the context of substances, "danger" would imply that the substance is highly hazardous, toxic, or potentially lethal if not handled or used properly.

Question 10: The following symbol: What does it mean?

Potentially harmful chemical, generally an irritant (Correct answer)
General warning sign that says just don't do it
Don't store chemicals here
Do not enter

Correct answer: Potentially harmful chemical, generally an irritant

The exclamation mark in a diamond is a GHS pictogram indicating a potentially harmful chemical that is generally an irritant, sensitizer, or causes other less-severe health effects. It is a defined hazard category, not a vague 'don't do it,' storage prohibition, or entry-restriction sign.

Question 11: What does the abbreviation PEL mean?

Permissible Exposure Limit (Correct answer)
Prohibitive Electric Level

Correct answer: Permissible Exposure Limit

The maximum permissible exposure for an employee to a chemical substance or physical agent is set by law. Although some are short-term exposure limits (STEL) or ceiling limits, it is based on an eight-hour time weighted average (TWA).

Question 12: What detail from the list below appears in column 2 of the hazardous materials table?

Proper Shipping Name (Correct answer)
Special Provisions
Identification Numbers
Quantity Limitations

Correct answer: Proper Shipping Name

The detail "Proper Shipping Name" appears in column 2 of the hazardous materials table. In the context of hazardous materials transportation, the hazardous materials table (HMT) is a comprehensive list that provides essential information about hazardous substances or dangerous goods. This table is used for proper classification, identification, and labeling of hazardous materials during transportation.

Question 13: SDS stands for what?

Safety Data Sheet (Correct answer)
Safety Document Sheet
Safety Description Sheet
None of the above

Correct answer: Safety Data Sheet

SDS stands for Safety Data Sheet.

Question 14: The following symbol: What does it mean?

Harmful to living tissue
Hazardous to both living and non-living material, can cut or burn
Dangerous liquid, don't touch
Acid, touching it will lead to what you see in the image above
Corrosive (Correct answer)

Correct answer: Corrosive

The corrosive pictogram (showing a hand and surface being eaten away) means the substance can destroy living tissue and materials on contact, such as strong acids and bases. The other answers describe partial or informal versions of this hazard, but 'corrosive' is the correct standardized term.

Question 15: Which of these DOES NOT constitute a chemical's likely physical hazard?

Flammable
Acute (Correct answer)
Corrosive
Reactive

Correct answer: Acute

'Acute' refers to a health effect—the speed and severity of harm to the body—not a physical hazard of the chemical itself. Flammability, corrosivity, and reactivity are all intrinsic physical hazards, which is why 'acute' is the one that does not belong.

Question 16: Which of the following claims regarding hazardous substance packaging is accurate?

Gas must not be mixed
Effectiveness of package must not be substantially reduced
It is permissible to pack different dangerous goods and non-dangerous goods together in one outer packing as long as they do not hazardously react together
Hazardous materials must be checked for compatibility with their packaging
All of the above (Correct answer)

Correct answer: All of the above

All of the listed packaging requirements are valid: incompatible gases must not be mixed, package effectiveness must be maintained, different goods may share outer packaging only if they don't react hazardously, and materials must be checked for packaging compatibility. Because each statement is accurate, 'all of the above' is correct.

Free CDL Hazardous Materials (HazMat) Endorsement Questions and Answers

What qualifies the hazardous material being transported? Manifests, bills of lading, and shipping orders are all regarded as belonging to this category.