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Alabama CDL HazMat study materials
Alabama CDL HazMat study resources

Alabama CDL HazMat practice questions

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Question 1Hazardous materials regulations, definitions, and communication rules

Under the hazardous materials regulations, a material is a hazardous material if it is capable of posing an unreasonable risk to health, safety, and property when transported in commerce and is listed in which reference?

  1. The Emergency Response Guidebook
  2. The Commercial Driver's License Manual
  3. The North American Industry Classification Manual
  4. The Hazardous Materials Table Correct answer.

Explanation

The Hazardous Materials Table in 49 CFR 172.101 is the regulatory list that designates materials as hazardous for transportation. The Emergency Response Guidebook is a response aid, not a designation list.

Question 2Hazardous materials regulations, definitions, and communication rules

A shipper offers a package for transport that contains a hazardous material. Who is responsible for properly classing and describing that material on the shipping paper?

  1. The receiver at destination
  2. The carrier's dispatcher
  3. The driver who loads it
  4. The shipper Correct answer.

Explanation

The shipper (offeror) is responsible for determining the hazard class, preparing shipping papers, and marking and labeling the package before offering it to a carrier. The carrier and driver have separate responsibilities to verify and accept only properly prepared shipments.

Question 3Hazardous materials regulations, definitions, and communication rules

Which hazard class designation applies to flammable liquids such as gasoline?

  1. Class 9
  2. Class 8
  3. Class 2
  4. Class 3 Correct answer.

Explanation

Class 3 covers flammable and combustible liquids, including gasoline. Class 2 covers gases, Class 8 corrosives, and Class 9 miscellaneous hazardous materials.

Question 4Hazardous materials regulations, definitions, and communication rules

On a hazardous materials shipping paper, which entry must appear in the basic description along with the proper shipping name and hazard class?

  1. The UN or NA identification number Correct answer.
  2. The vehicle's license plate
  3. The package's purchase price
  4. The consignee's phone number

Explanation

The basic description consists of the proper shipping name, hazard class or division, and the UN or NA identification number, in that sequence. Price, phone numbers, and plate numbers are not part of the basic description.

Question 5Hazardous materials regulations, definitions, and communication rules

A driver is preparing to transport a shipment of a hazardous material. Which document must be within reach while the driver is at the controls of the vehicle?

  1. The vehicle registration
  2. The cargo insurance certificate
  3. The bill of lading receipt copy
  4. The shipping paper Correct answer.

Explanation

The shipping paper must be kept within the driver's immediate reach while at the controls and be readily visible to others entering the cab. It documents what is being carried for emergency responders.

Question 6Hazardous materials regulations, definitions, and communication rules

A shipping paper for a hazardous materials load must include an emergency response telephone number. What is required of that number?

  1. It may be a number that is answered only during business hours
  2. It may be omitted if the driver carries a cell phone
  3. It must be monitored at all times during transport Correct answer.
  4. It may be the shipper's general office line with voicemail

Explanation

The emergency response telephone number must be monitored at all times while the material is in transportation, including storage incidental to movement. A number answered only during business hours or routed to voicemail does not meet the requirement.

Question 7Hazardous materials regulations, definitions, and communication rules

What does the UN identification number on an orange panel or placard identify?

  1. The specific hazardous material being transported Correct answer.
  2. The total weight of the shipment
  3. The date the material was packaged
  4. The manufacturing plant where the material was produced

Explanation

The four-digit UN or NA identification number corresponds to a specific hazardous material and lets emergency responders identify it quickly. Placards display this number so responders can consult response guides.

Question 8Hazardous materials regulations, definitions, and communication rules

A vehicle is carrying a quantity of a hazardous material that requires placarding. When must the placards be displayed?

  1. Only when the driver requests them
  2. Only when crossing a state line
  3. At all times the material is loaded on the vehicle, including during transport Correct answer.
  4. Only while the vehicle is parked at a terminal

Explanation

Required placards must be displayed on the vehicle whenever the material requiring them is loaded, including while in transit. They are removed only after the material has been unloaded and the vehicle is no longer carrying a placardable quantity.

Question 9Hazardous materials regulations, definitions, and communication rules

A driver notices that one required placard has fallen off the vehicle during a trip. What is the appropriate action?

  1. Replace the missing placard before continuing Correct answer.
  2. Cover the remaining placards so the display is uniform
  3. Record the loss on the shipping paper and continue
  4. Continue to the destination and report it at the end of the trip

Explanation

Placards must be displayed as required at all times the material is aboard, so a missing placard must be replaced before the vehicle continues. Removing or covering the other placards would compound the violation.

Question 10Hazardous materials regulations, definitions, and communication rules

Which hazard class placard would be used for a material that is a corrosive liquid capable of damaging skin and metal?

  1. Class 6
  2. Class 7
  3. Class 3
  4. Class 8 Correct answer.

Explanation

Class 8 is the corrosive class, covering materials that cause full-thickness destruction of skin or severely corrode steel or aluminum. Class 3 is flammable liquid, Class 6 toxic, and Class 7 radioactive.

Question 11Hazardous materials regulations, definitions, and communication rules

A material is being shipped that meets the definition of a hazardous substance under CERCLA. What additional marking is required in addition to the normal hazardous materials markings?

  1. The words FRAGILE in bold letters
  2. A red diagonal stripe on the package
  3. The letters RQ on the shipping paper and package marking Correct answer.
  4. A green dot on the placard

Explanation

Hazardous substances in reportable quantities must be identified with the letters RQ on the shipping paper and package markings. This alerts responders that a CERCLA reportable quantity is present.

Question 12Hazardous materials regulations, definitions, and communication rules

Which of the following is a proper shipping name as it must appear on a shipping paper?

  1. Gasoline Correct answer.
  2. Unleaded fuel
  3. Motor spirit
  4. Petrol

Explanation

The Hazardous Materials Table lists exact proper shipping names that must be used; "Gasoline" is the table entry. Common synonyms and trade names are not acceptable substitutes for the proper shipping name.

Question 13Hazardous materials regulations, definitions, and communication rules

According to the hazardous materials regulations, what does the term "hazmat employee" mean?

  1. Any person who works for a company that ships goods
  2. Any licensed commercial driver
  3. A person who owns a commercial vehicle
  4. A person who directly affects hazardous materials transportation safety Correct answer.

Explanation

A hazmat employee is a person who directly affects hazardous materials transportation safety, including loading, unloading, handling, and preparing shipments. This definition triggers training requirements.

Question 14Hazardous materials regulations, definitions, and communication rules

How often must a hazmat employee receive recurrent training under the hazmat regulations?

  1. Every three years Correct answer.
  2. Every year
  3. Every two years
  4. Every five years

Explanation

Recurrent training is required at least once every three years. The training must cover general awareness, function-specific duties, and safety, plus security awareness.

Question 15Hazardous materials regulations, definitions, and communication rules

Which three types of training are required for a hazmat employee?

  1. First aid, CPR, and firefighting
  2. Dispatch, routing, and billing
  3. General awareness, function-specific, and safety Correct answer.
  4. Driving, parking, and backing

Explanation

Hazmat training must include general awareness and function-specific training plus safety training, and security awareness must also be addressed. Driving skills and medical training are separate requirements.

Question 16Hazardous materials regulations, definitions, and communication rules

A driver is hauling a load of a hazardous material that requires placards. Which action is required before driving through a tunnel or under a structure with limited clearance?

  1. Check that placards are displayed and observe any route restrictions Correct answer.
  2. Sound the horn continuously
  3. Turn on the four-way flashers and speed up
  4. Remove the placards temporarily

Explanation

Placards must remain displayed, and drivers must obey route restrictions that apply to hazardous materials, such as tunnel prohibitions. Removing placards to pass through a restricted route is prohibited.

Question 17Hazardous materials regulations, definitions, and communication rules

What is the purpose of the emergency response information that must accompany a hazardous materials shipment?

  1. To provide immediate guidance to responders in an incident Correct answer.
  2. To document the vehicle's maintenance history
  3. To list the shipper's billing terms
  4. To record the driver's hours of service

Explanation

Emergency response information tells responders what the material is and how to respond to a spill, fire, or exposure. It must be immediately available to those responding to an incident.

Question 18Hazardous materials regulations, definitions, and communication rules

A shipping paper entry reads "Gasoline, 3, UN1203, PG II." Which element of the basic description is represented by "UN1203"?

  1. The proper shipping name
  2. The identification number Correct answer.
  3. The hazard class
  4. The packing group

Explanation

UN1203 is the four-digit identification number that corresponds to gasoline in the Hazardous Materials Table. The basic description sequence is proper shipping name, hazard class, and identification number, followed by packing group.

Question 19Hazardous materials regulations, definitions, and communication rules

A material is described on the shipping paper with the letters "PG II." What does the packing group indicate?

  1. The size of the shipping container
  2. The number of packages in the shipment
  3. The degree of danger the material presents within its class Correct answer.
  4. The route the shipment must take

Explanation

Packing groups rank the degree of hazard within a class, with I being great danger, II moderate danger, and III minor danger. They guide packaging strength requirements.

Question 20Hazardous materials regulations, definitions, and communication rules

Which of the following best describes a "reportable quantity" under the hazardous materials regulations?

  1. The minimum order a shipper will accept
  2. The quantity of a hazardous substance that, if released, must be reported Correct answer.
  3. The maximum weight a vehicle may legally carry
  4. The number of placards required on a trailer

Explanation

A reportable quantity is the threshold at which a release of a hazardous substance must be reported to authorities. Shipments of hazardous substances in reportable quantities are marked RQ.

Question 21Hazardous materials regulations, definitions, and communication rules

A driver is asked to accept a shipment of hazardous materials, but the shipping paper lacks a hazard class. What should the driver do?

  1. Accept the load and add the class from memory
  2. Refuse to accept the shipment until the paper is corrected Correct answer.
  3. Accept the load and notify the receiver on arrival
  4. Accept the load and place a placard matching the material

Explanation

A carrier may not accept a hazardous materials shipment unless the shipping paper is complete and accurate, including the hazard class. The driver should refuse the shipment until the shipper corrects the paperwork.

Question 22Hazardous materials regulations, definitions, and communication rules

Which placard is required for a material in hazard Class 7?

  1. Corrosive
  2. Poison
  3. Radioactive Correct answer.
  4. Oxidizer

Explanation

Class 7 is the radioactive hazard class, and its placard reads RADIOACTIVE. Oxidizer is Class 5.1, poison is Class 6.1, and corrosive is Class 8.

Question 23Hazardous materials regulations, definitions, and communication rules

A driver is transporting a hazardous material and must stop for a weigh station inspection. Which items must be available for the inspector?

  1. Only the driver's license
  2. The shipping paper and emergency response information Correct answer.
  3. Only the bill of lading
  4. Only the placards on the vehicle

Explanation

Inspectors may examine the shipping paper and the emergency response information to confirm the shipment is properly documented. Placards alone do not provide the detail required for inspection.

Question 24Hazardous materials regulations, definitions, and communication rules

What does the term "hazardous waste" mean when used in the hazardous materials regulations for transportation?

  1. Any material that is transported in a tank vehicle
  2. Any material that has been used in a commercial process
  3. Any material that is flammable
  4. A material that is subject to the EPA hazardous waste manifest requirements Correct answer.

Explanation

For transportation purposes, hazardous waste is a material subject to EPA hazardous waste manifest requirements under the Resource Conservation and Recovery Act. Waste shipments require a manifest in addition to the shipping paper description.

Question 25Hazardous materials regulations, definitions, and communication rules

Which of the following is the correct order of elements in the basic description on a shipping paper?

  1. Hazard class, identification number, proper shipping name
  2. Proper shipping name, hazard class, identification number Correct answer.
  3. Packing group, proper shipping name, hazard class
  4. Identification number, proper shipping name, hazard class

Explanation

The basic description appears in the order of proper shipping name, hazard class or division, and identification number, with the packing group following. This sequence is required so the entry is uniform and readable.

Question 26Hazardous materials regulations, definitions, and communication rules

A driver is reviewing the shipping paper for a load and sees the entry "UN1203" in the basic description. Which element of the basic description does this represent?

  1. The identification number Correct answer.
  2. The hazard class
  3. The packing group
  4. The total quantity

Explanation

The letters "UN" followed by four digits form the identification number, which is one of the required elements of the basic description on a shipping paper. It identifies the specific hazardous material and is used by responders and inspectors.

Question 27Hazardous materials regulations, definitions, and communication rules

Which of the following materials would require a Class 8 placard on the vehicle?

  1. A liquid that corrodes steel and burns skin on contact Correct answer.
  2. A compressed gas that supports combustion
  3. A material that gives off radiation above background levels
  4. A flammable liquid with a flash point below 100 degrees F

Explanation

Class 8 covers corrosive materials, which are substances that cause visible destruction or irreversible damage to skin or to steel/aluminum surfaces. A liquid that corrodes metal and burns skin fits that definition.

Question 28Hazardous materials regulations, definitions, and communication rules

A driver is preparing to transport a shipment of a hazardous material. Which of the following must be carried in the cab and be within reach while driving?

  1. The shipper's material safety data sheet only
  2. The bill of lading for the previous load
  3. The shipping paper and emergency response information Correct answer.
  4. A copy of the vehicle registration only

Explanation

The hazardous materials regulations require that the shipping paper and the emergency response information be kept in the same holder and be accessible to the driver while operating the vehicle. This ensures responders can find the information after an incident.

Question 29Hazardous materials regulations, definitions, and communication rules

What does the term "hazardous substance" mean under the hazardous materials regulations?

  1. Any material that requires a Class 9 placard
  2. A material that is toxic to aquatic life only
  3. A material listed by EPA as a hazardous substance under CERCLA and shipped in a quantity at or above its reportable quantity Correct answer.
  4. Any material that can burn under normal conditions

Explanation

A hazardous substance is a material designated by the EPA under CERCLA that, when offered for transportation in a quantity equal to or greater than its reportable quantity in one package, triggers hazmat requirements. This is distinct from a general hazardous material.

Question 30Hazardous materials regulations, definitions, and communication rules

A shipping paper entry reads "Acetone, 3, UN1090, PG II, 200 L." Which element appears in the position that should show the hazard class?

  1. PG II
  2. UN1090
  3. Acetone
  4. 3 Correct answer.

Explanation

The basic description follows the order: proper shipping name, hazard class, identification number, and packing group. In this entry, the single digit "3" is the hazard class.

Question 31Hazardous materials regulations, definitions, and communication rules

A driver receives a shipment of a hazardous material and notices the shipping paper shows the hazard class as "2.1" but the material is a corrosive liquid. What is the most appropriate action?

  1. Accept the load and correct the paper in transit
  2. Refuse the shipment and notify the shipper of the discrepancy Correct answer.
  3. Ignore the discrepancy since the proper shipping name is correct
  4. Place a Class 8 placard over the Class 2.1 placard and proceed

Explanation

A driver should not accept a shipment when the shipping paper does not accurately describe the material. The shipper is responsible for correct classification and documentation, and the driver should resolve the discrepancy before transport.

Question 32Hazardous materials regulations, definitions, and communication rules

Which of the following best describes the purpose of the emergency response telephone number on a shipping paper?

  1. It is the number the driver calls to report arrival at the destination
  2. It is the number of the local fire department where the vehicle is registered
  3. It connects responders to a person who can provide detailed information about the material Correct answer.
  4. It is the number used to order replacement placards

Explanation

The emergency response telephone number must connect to a person who is knowledgeable about the material and available during transport to provide response and incident information. It is not a general business or dispatch number.

Question 33Hazardous materials regulations, definitions, and communication rules

A driver is hauling a load that requires placards. When must the placards be displayed on the vehicle?

  1. Only during daylight hours
  2. Only after the vehicle leaves the shipper's property
  3. At all times the vehicle contains the material, including during loading and unloading Correct answer.
  4. Only when the vehicle is loaded or being loaded with the material

Explanation

Placards must be displayed on the vehicle at all times the hazardous material is present, including while loading and unloading. Removing them early or delaying them creates a communication gap for responders and inspectors.

Question 34Hazardous materials regulations, definitions, and communication rules

A material is described with the packing group "PG I." What does this indicate about the material?

  1. It presents the greatest degree of danger within its hazard class Correct answer.
  2. It may only be transported by rail
  3. It is exempt from placarding requirements
  4. It presents a low degree of danger within its hazard class

Explanation

Packing groups rank materials within a hazard class by degree of danger: PG I is great danger, PG II is medium danger, and PG III is minor danger. PG I therefore indicates the highest hazard level within the class.

Question 35Hazardous materials regulations, definitions, and communication rules

A driver is transporting a hazardous material and is stopped for an inspection. Which combination of items must be available to the inspector?

  1. Only the driver's license and vehicle registration
  2. The shipping paper and a personal copy of the regulations
  3. Only the shipping paper
  4. The shipping paper, emergency response information, and required placards on the vehicle Correct answer.

Explanation

During an inspection, the driver must be able to present the shipping paper and emergency response information, and the vehicle must display the required placards. These are the core communication requirements for a hazmat load.

Question 36Hazardous materials regulations, definitions, and communication rules

A driver is offered a shipment labeled as a hazardous waste. Which statement best describes how hazardous waste is treated under the hazardous materials regulations?

  1. It is exempt from all hazmat communication requirements
  2. It is a hazardous material subject to the regulations and requires the additional waste markings and shipping description Correct answer.
  3. It is regulated only by state environmental agencies, not by DOT
  4. It only requires placards if it is also flammable

Explanation

Hazardous waste is a hazardous material for transportation purposes and must meet the same communication requirements, with additional waste-specific marking and description rules. It is not exempt from DOT regulation.

Question 37Hazardous materials regulations, definitions, and communication rules

A shipper offers a package marked with the proper shipping name and UN number but the shipping paper omits the total quantity. What is the driver's best course of action?

  1. Ask the shipper to correct the shipping paper before accepting the shipment Correct answer.
  2. Write the quantity on the paper personally and proceed
  3. Accept the shipment because the name and number are present
  4. Accept the shipment and note the omission in a logbook

Explanation

The total quantity is a required element of the shipping paper for hazardous materials, and an incomplete description is a violation. The driver should have the shipper correct the documentation before transport rather than accepting an inaccurate paper.

Question 38Hazardous materials regulations, definitions, and communication rules

A driver is reviewing a shipping paper and sees the basic description "Sulfuric acid, 8, UN1830, PG II." Which statement about this entry is correct?

  1. The material is a Class 8 corrosive in packing group I
  2. The material is a Class 3 flammable liquid in packing group II
  3. The material is a Class 2 gas in packing group II
  4. The material is a Class 8 corrosive in packing group II Correct answer.

Explanation

The hazard class is 8, which designates a corrosive material, and the packing group shown is II, indicating medium danger within the class. The identification number UN1830 corresponds to sulfuric acid with those attributes.

Question 39Hazardous materials regulations, definitions, and communication rules

A driver is transporting a material that is both a hazardous substance above its reportable quantity and a hazardous waste. Which statement best reflects the communication requirements?

  1. Neither designation triggers requirements if the material is in a small package
  2. Only the hazardous substance requirements apply because it is the more specific category
  3. Only the waste requirements apply because waste takes precedence
  4. The shipment must satisfy the communication requirements applicable to both designations Correct answer.

Explanation

When a material meets more than one regulatory designation, the applicable communication requirements for each designation must be met; one does not cancel the other. The driver and shipper must ensure markings, descriptions, and placards satisfy all applicable rules.

Question 40Hazardous materials regulations, definitions, and communication rules

A driver is checking placards before departure and finds that the vehicle displays a Flammable placard, but the shipping paper shows the material is a Class 8 corrosive. What is the best interpretation of this situation?

  1. The Flammable placard is acceptable because corrosives are also flammable
  2. The placard does not match the hazard class on the shipping paper, so the discrepancy must be resolved before departure Correct answer.
  3. The placard should be removed and no placard displayed
  4. The placard matches the class shown, so no action is needed

Explanation

Placards must correspond to the hazard class of the material being transported. A mismatch between the placard and the shipping paper is a communication error that must be corrected before the vehicle departs.

Question 41Shipping papers, marking, labeling, and placarding

When must a driver keep shipping papers for hazardous materials accessible during transport?

  1. Stored in a sealed envelope in the glove box
  2. In a pouch on the driver's door or in clear view within reach while driving Correct answer.
  3. Locked in the trailer with the cargo
  4. Mailed to the consignee before departure

Explanation

Hazardous materials shipping papers must be readily accessible to the driver and to emergency responders. Keeping them in a door pouch or in clear view within reach satisfies this requirement. Locking them away defeats the purpose of immediate access.

Question 42Shipping papers, marking, labeling, and placarding

What is the basic hazard communication purpose of placards on a vehicle?

  1. To list the consignee's address
  2. To identify the carrier's insurance status
  3. To show the vehicle's gross weight
  4. To warn others of the hazard class of the material being carried Correct answer.

Explanation

Placards communicate the hazard class of the material to emergency responders and the public. They do not convey weight, insurance, or routing information. The hazard warning is their sole regulatory purpose.

Question 43Shipping papers, marking, labeling, and placarding

Which document must accompany a shipment of hazardous materials and describe the material being transported?

  1. A delivery receipt
  2. A shipping paper Correct answer.
  3. A bill of lading only
  4. A vehicle registration

Explanation

The shipping paper is the required document that identifies the hazardous material, its hazard class, and related information. A bill of lading may serve as a shipping paper only if it contains the required hazmat entries. Registration and delivery receipts do not fulfill this role.

Question 44Shipping papers, marking, labeling, and placarding

On a shipping paper, what does the basic description of a hazardous material include?

  1. Only the shipper's phone number
  2. The proper shipping name, hazard class, and UN identification number Correct answer.
  3. The vehicle's VIN and plate number
  4. The driver's license number and route

Explanation

The basic description on a shipping paper consists of the proper shipping name, hazard class or division, and the UN identification number, in the required sequence. This standardized format lets responders identify the material quickly. Driver and vehicle identifiers are not part of the basic description.

Question 45Shipping papers, marking, labeling, and placarding

What does the UN identification number on a shipping paper or orange panel represent?

  1. The shipper's account number
  2. The carrier's DOT operating authority number
  3. A four-digit code identifying the specific hazardous material Correct answer.
  4. The vehicle's inspection sticker number

Explanation

The UN identification number is a four-digit code assigned to a specific hazardous material or group of materials. It appears on shipping papers and, when required, on orange panels or placards. It is not an operating authority or account number.

Question 46Shipping papers, marking, labeling, and placarding

Which hazard class placard is required for a material classified as flammable liquid?

  1. Class 3 Correct answer.
  2. Class 2
  3. Class 9
  4. Class 8

Explanation

Flammable and combustible liquids are assigned to hazard Class 3. Class 2 covers gases, Class 8 covers corrosives, and Class 9 covers miscellaneous hazardous materials. The placard must match the hazard class shown on the shipping paper.

Question 47Shipping papers, marking, labeling, and placarding

When is a placard required on a vehicle carrying hazardous materials?

  1. Only when the shipper requests it
  2. Only on interstate trips
  3. Only when the material exceeds 1,001 pounds
  4. When the quantity or configuration meets the placarding threshold in the regulations Correct answer.

Explanation

Placarding is required when the quantity and configuration of hazardous materials meet the thresholds in the placarding tables. Some materials require placards at any quantity, while others have quantity exceptions. Placarding is not left to the shipper's discretion.

Question 48Shipping papers, marking, labeling, and placarding

Who is generally responsible for providing the required shipping papers and placards for a hazardous materials shipment?

  1. The shipper Correct answer.
  2. The driver's employer only
  3. The receiver at the destination
  4. The highway patrol

Explanation

The shipper is responsible for preparing the shipping paper and providing required placards to the carrier. The carrier and driver then ensure the papers travel with the shipment and placards are properly displayed. Enforcement agencies do not supply these items.

Question 49Shipping papers, marking, labeling, and placarding

A shipping paper lists a material with the proper shipping name 'Gasoline' and hazard class 3. Which placard should be displayed when the quantity requires placarding?

  1. Oxidizer
  2. Flammable gas
  3. Flammable liquid Correct answer.
  4. Corrosive

Explanation

Gasoline is a Class 3 flammable liquid, so the flammable liquid placard matches the shipping paper. Placards must correspond to the hazard class of the material described. Flammable gas, oxidizer, and corrosive placards would misstate the hazard.

Question 50Shipping papers, marking, labeling, and placarding

Where on a shipping paper must hazardous materials be identified so that they stand out from other entries?

  1. They must be omitted to protect security
  2. They must be highlighted in a special color
  3. They must be listed first, or otherwise distinguished as required Correct answer.
  4. They must be written in a separate booklet

Explanation

Hazardous materials entries must be distinguishable, such as by listing them first or using the required highlighting method. This helps responders locate the hazmat information quickly. Omitting the information is never permitted.