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Georgia CDL Hazmat study materials
Georgia CDL Hazmat study resources

Georgia CDL Hazmat practice questions

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Question 1Hazardous Materials Regulations and Definitions

Under the federal hazardous materials regulations, which agency maintains the Hazardous Materials Table that drivers and shippers use to classify shipments?

  1. The Occupational Safety and Health Administration
  2. The Environmental Protection Agency
  3. The Federal Motor Carrier Safety Administration
  4. The Pipeline and Hazardous Materials Safety Administration Correct answer.

Explanation

PHMSA, part of the U.S. Department of Transportation, issues and maintains the Hazardous Materials Regulations in 49 CFR Parts 100-185, including the Hazardous Materials Table in Part 172.102. FMCSA regulates the commercial driver and carrier side, while OSHA and EPA have separate worker-safety and environmental statutes.

Question 2Hazardous Materials Regulations and Definitions

A shipper offers a load that requires placards. Who is responsible for deciding which placards the vehicle must display before it leaves the terminal?

  1. The consignee, once the shipment arrives
  2. The shipper or carrier, who must provide the required placards and information Correct answer.
  3. The driver alone, based on a visual inspection of the cargo
  4. The state DOT inspector at the first weigh station

Explanation

The hazardous materials regulations place the placarding duty on the offeror and the motor carrier, who must furnish the correct placards and ensure they are applied. The driver is responsible for checking that placards match the shipment and are displayed properly, but the driver does not independently determine the hazard class from cargo appearance.

Question 3Hazardous Materials Regulations and Definitions

On a shipping paper, a hazardous material description must include the basic description. Which sequence correctly states the required order?

  1. Hazard class, proper shipping name, packing group, UN identification number
  2. Proper shipping name, packing group, UN identification number, hazard class
  3. UN identification number, proper shipping name, hazard class or division, packing group Correct answer.
  4. Packing group, UN identification number, hazard class, proper shipping name

Explanation

Section 172.202 requires the basic description in a specific sequence: identification number, proper shipping name, hazard class or division, and subsidiary hazard if any, followed by the packing group. The identification number may be placed before or after the name only when the table authorizes that variation, but the standard order begins with the UN number.

Question 4Hazardous Materials Regulations and Definitions

A driver is hauling a material whose shipping paper shows a hazard class of 6.1 with packing group I. What does the packing group indicate about the material?

  1. The size of the individual packages allowed in the vehicle
  2. The placard color that must be used
  3. The relative degree of danger within the hazard class Correct answer.
  4. The temperature range at which the material is stable

Explanation

Packing groups rank materials within a hazard class by degree of danger: I is great danger, II is medium danger, and III is minor danger. The assignment affects packaging and quantity limits but does not by itself set placard color, package size, or storage temperature.

Question 5Hazardous Materials Regulations and Definitions

Which hazard class is assigned to materials that are capable of posing a significant risk to health, safety, or property when transported, but do not meet any other hazard class definition?

  1. Class 8, corrosive
  2. Class 2, gas
  3. Class 4, flammable solid
  4. Class 9, miscellaneous hazardous material Correct answer.

Explanation

Class 9 is the residual category for materials that present a hazard in transportation but do not fit classes 1 through 8. Examples include certain lithium batteries, dry ice, and magnetized material. Classes 2, 4, and 8 each have specific defining criteria that must be met before a material is placed there.

Question 6Hazardous Materials Regulations and Definitions

A driver is assigned to transport a Division 1.1 explosive. Which statement correctly describes the general operating restriction that applies to this load?

  1. The vehicle may stop for fuel only at locations approved by the carrier's safety director
  2. The vehicle may travel at normal highway speed with no special routing
  3. The vehicle must be attended at all times and may not be left unattended in a public place Correct answer.
  4. The vehicle may carry passengers if they sign a release

Explanation

Explosive loads in Division 1.1 through 1.3 generally require attendance, and the vehicle may not be left unattended except in secure locations meeting the regulations. Routing, parking, and fueling restrictions also apply. Passengers are prohibited on vehicles carrying most explosives, and speed and routing are not left to the driver's discretion.

Question 7Hazardous Materials Regulations and Definitions

The Hazardous Materials Table entry for a material shows a plus sign (+) in the first column. What does that symbol mean?

  1. The entry is a domestic entry not recognized internationally
  2. The entry identifies a material that is subject to the regulations only in bulk
  3. The entry is a generic or n.o.s. name that requires technical names Correct answer.
  4. The entry is a hazardous substance under CERCLA

Explanation

A plus sign in column 1 of the Hazardous Materials Table indicates that the entry is a proper shipping name for a material that also requires a technical name to be shown in parentheses. This commonly applies to n.o.s. and generic entries, where the specific chemical identity must accompany the generic name on the shipping paper.

Question 8Hazardous Materials Regulations and Definitions

A shipping paper includes the notation 'RQ' next to the basic description. What does this notation indicate to the driver?

  1. The material is exempt from placarding
  2. The material must be transported only in a refrigerated unit
  3. The material is radioactive and requires exclusive-use routing
  4. The material is a hazardous substance subject to reportable quantity requirements Correct answer.

Explanation

RQ stands for reportable quantity and marks a hazardous substance listed under CERCLA when the shipment quantity meets or exceeds the reportable quantity for that substance. The notation triggers additional shipping paper and emergency response obligations, but it does not exempt the load from placarding or impose routing rules.

Question 9Hazardous Materials Regulations and Definitions

Which document must a driver keep within reach while operating a vehicle carrying hazardous materials, and must be made available to an enforcement officer upon request?

  1. The shipping paper describing the hazardous materials aboard Correct answer.
  2. The carrier's safety rating certificate
  3. The vehicle registration only
  4. The bill of lading for the return trip

Explanation

Section 177.817 requires the shipping paper to accompany each shipment and to be readily accessible to the driver and to enforcement personnel. It may be kept in a holder on the door or in another location within reach, but it must be produced immediately when requested.

Question 10Hazardous Materials Regulations and Definitions

A driver is transporting a load of Division 2.1 flammable gas in cylinders. Which placarding choice is correct when the shipment requires placards?

  1. No placard is required because cylinders are exempt
  2. A NON-FLAMMABLE GAS placard is required
  3. A FLAMMABLE placard is required for the gas
  4. A FLAMMABLE GAS placard is required Correct answer.

Explanation

Division 2.1 materials use the FLAMMABLE GAS placard, which carries the red flame symbol and the division number. The general FLAMMABLE placard applies to Class 3 liquids and Class 4 solids, not to gases. Cylinders are not exempt from placarding merely because they are cylinders.

Question 11Hazardous Materials Regulations and Definitions

A carrier loads 1,500 pounds of a Division 6.1 packing group III material that appears in the 172.504 table. Which placarding outcome applies?

  1. The 1,001-pound aggregate rule applies, so the POISON placard is required Correct answer.
  2. The material must be placarded only when transported in bulk
  3. Placarding is required only if the material is a liquid
  4. No placard is required because packing group III materials are always exempt

Explanation

For table 2 materials, placards are required when the aggregate gross weight of all hazardous materials in the shipment equals or exceeds 1,001 pounds, with certain exceptions. At 1,500 pounds, the threshold is met and the POISON placard for Division 6.1 is required. Packing group III does not create a blanket exemption from placarding.

Question 12Hazardous Materials Regulations and Definitions

Which hazard class includes materials that may cause a severe burn or irreversible damage to skin on contact?

  1. Class 3, flammable liquid
  2. Class 6, toxic
  3. Class 8, corrosive Correct answer.
  4. Class 5, oxidizer

Explanation

Class 8 covers corrosive materials that cause full-thickness destruction of skin tissue or corrode steel or aluminum at specified rates. Oxidizers, toxic materials, and flammable liquids have their own defining criteria and may be harmful by other mechanisms, but skin destruction is the hallmark of a corrosive.

Question 13Hazardous Materials Regulations and Definitions

A driver picks up a load of Division 4.3 material. What special handling concern should the driver recognize from that division designation?

  1. The material gives off flammable gas when it contacts water Correct answer.
  2. The material is an organic peroxide requiring temperature control
  3. The material is a gas that supports combustion
  4. The material is a liquid with a flash point below 60 degrees Celsius

Explanation

Division 4.3 covers substances that, on contact with water, emit flammable gases. These loads must be kept dry, protected from moisture, and handled so that spills do not reach water or damp surfaces. Flash point criteria describe Class 3 liquids, organic peroxides are Class 5.2, and oxidizing gases are Division 2.2.

Question 14Hazardous Materials Regulations and Definitions

Which requirement applies to a driver who operates a vehicle transporting a hazardous material that requires placards?

  1. The driver must hold a hazardous materials endorsement and be at least 21 years old Correct answer.
  2. The driver must hold a hazardous materials endorsement only when driving interstate
  3. The driver must hold a hazardous materials endorsement only when hauling bulk tanks
  4. The driver may operate with a standard CDL if the quantity is below 5,000 pounds

Explanation

A hazardous materials endorsement is required to operate a commercial motor vehicle transporting a quantity of hazardous material that requires placarding. The driver must also meet the general CDL age minimum of 21 for interstate commerce and complete the required knowledge and security threat assessment.

Question 15Hazardous Materials Regulations and Definitions

A driver is hauling a hazardous material that requires placards and is crossing a state line. Which statement about the shipping paper is correct?

  1. The shipping paper may be mailed to the consignee separately
  2. The shipping paper must be carried on the vehicle and be accessible to enforcement Correct answer.
  3. The shipping paper is required only for interstate shipments over 500 miles
  4. The shipping paper may be replaced by a placard on the vehicle

Explanation

The shipping paper must accompany the hazardous materials shipment and be readily accessible to the driver and inspectors, regardless of the distance traveled. It cannot be replaced by placards, mailed separately, or waived for short hauls, because it carries the emergency response information.

Question 16Hazardous Materials Regulations and Definitions

A driver discovers that a placard has fallen off a vehicle carrying a placarded load. What is the correct action?

  1. Replace the missing placard before continuing, using the carrier's supply Correct answer.
  2. Cover the remaining placards so all sides match
  3. Continue to the destination and report the loss at delivery
  4. Reduce speed and continue without the placard

Explanation

Placards must be displayed on both sides and both ends of the vehicle for the required hazard classes, and the carrier must provide replacements. A missing placard must be restored before the vehicle continues. Removing the remaining placards or continuing without correction leaves the vehicle out of compliance.

Question 17Hazardous Materials Regulations and Definitions

Which emergency response information must accompany a hazardous materials shipment?

  1. A phone number for the carrier's dispatcher only
  2. The consignee's written receiving instructions
  3. The driver's personal contact information
  4. A 24-hour emergency response telephone number and the nature of the hazard Correct answer.

Explanation

Section 172.602 requires emergency response information that includes a 24-hour telephone number monitored during transport, the basic description of the material, and information about the hazards and initial response measures. A dispatcher's daytime number or receiving instructions do not satisfy the requirement.

Question 18Hazardous Materials Regulations and Definitions

A driver is transporting a material in a portable tank that requires a DANGEROUS WHEN WET placard. What precaution should the driver take?

  1. Load the tank near the vehicle exhaust to keep it warm
  2. Open the tank vents before departure
  3. Transport the tank only at night
  4. Keep the tank covered and protected from rain and standing water Correct answer.

Explanation

DANGEROUS WHEN WET identifies a Division 4.3 material that reacts with water to release flammable gas. Drivers should keep such loads dry, ensure closures are secure, and avoid routes or parking areas where water could contact the material. Opening vents, heating, or night-only travel do not address the water-reactivity hazard.

Question 19Hazardous Materials Regulations and Definitions

What does the term 'exclusive use' mean when applied to a hazardous materials shipment?

  1. The vehicle is exempt from placarding
  2. The vehicle is reserved for a single delivery stop
  3. The vehicle may carry only hazardous materials from a single shipper and no other freight Correct answer.
  4. The shipper has paid for the entire vehicle and no other cargo may be loaded

Explanation

Exclusive use means the vehicle is used exclusively for a single shipper's hazardous materials and no other freight is loaded aboard. It does not mean the vehicle is exempt from placarding; in fact, exclusive-use shipments often trigger placarding even when quantities would otherwise fall below the threshold.

Question 20Hazardous Materials Regulations and Definitions

A driver is offered a package marked with the Division 6.1 label and a subsidiary Division 8 label. What does the subsidiary label tell the driver?

  1. The package contains two separate materials
  2. The material must be shipped by air
  3. The package is exempt from shipping paper requirements
  4. The material has a secondary corrosive hazard in addition to its primary toxicity Correct answer.

Explanation

A subsidiary hazard label identifies an additional hazard of the same material beyond its primary hazard class. A Division 6.1 material with a Division 8 subsidiary is primarily toxic but also corrosive. The subsidiary label does not indicate two separate materials or change the shipping paper requirement.

Question 21Hazardous Materials Regulations and Definitions

Which statement best describes the purpose of the Hazardous Materials Table in Part 172?

  1. It provides the proper shipping names, hazard classes, labels, and packaging authorizations for regulated materials Correct answer.
  2. It lists the penalties for hazmat violations
  3. It contains the emergency response guidebook procedures
  4. It lists the routes approved for hazardous materials

Explanation

The Hazardous Materials Table is the central reference that ties each proper shipping name to its hazard class, identification number, label codes, packing group, and packaging exceptions. Enforcement penalties, approved routes, and emergency response procedures are found elsewhere, such as in Part 107, state routing rules, and the ERG.

Question 22Hazardous Materials Regulations and Definitions

A driver is transporting a Class 3 flammable liquid with a flash point of 30 degrees Celsius. What does the flash point indicate?

  1. The lowest temperature at which the liquid gives off enough vapor to form an ignitable mixture near its surface Correct answer.
  2. The maximum temperature at which the liquid may be stored
  3. The temperature at which the liquid will ignite spontaneously
  4. The temperature at which the liquid freezes

Explanation

Flash point is the lowest temperature at which a liquid gives off vapor in sufficient concentration to form an ignitable mixture with air near the surface. It is not the autoignition temperature, the freezing point, or a storage maximum. Class 3 liquids are assigned by flash point and initial boiling point criteria.

Question 23Hazardous Materials Regulations and Definitions

A driver is preparing to load a hazardous material and notices that the package marking is missing the UN identification number. What is the correct action?

  1. Refuse to load the package until it is properly marked Correct answer.
  2. Load the package only if the destination is within the same state
  3. Load the package and note the discrepancy on the shipping paper
  4. Write the number on the package by hand

Explanation

Packages must be marked with the proper shipping name and identification number before they are offered for transport. A driver who finds a marking deficiency should not accept the package, because loading it would place the vehicle in violation and deprive responders of hazard information. The driver should not alter the package or rely on a note.

Question 24Hazardous Materials Regulations and Definitions

Which placard would be displayed for a shipment of a Division 5.1 oxidizer that requires placarding?

  1. A white POISON placard
  2. A red FLAMMABLE placard
  3. A yellow OXIDIZER placard with a flame over a circle Correct answer.
  4. An orange EXPLOSIVE placard

Explanation

Division 5.1 oxidizers use the yellow OXIDIZER placard, which shows a flame over a circle and the division number 5.1. Explosives use orange placards, toxic materials use white POISON placards, and flammable liquids and solids use red FLAMMABLE placards.

Question 25Hazardous Materials Regulations and Definitions

A driver is transporting a hazardous material that is subject to the regulations and must stop for a required inspection. Which document should the driver be prepared to show first?

  1. The consignee's delivery receipt
  2. The vehicle's maintenance log only
  3. The driver's personal hazmat training certificate only
  4. The shipping paper and emergency response information Correct answer.

Explanation

During a roadside inspection of a hazardous materials load, the driver is expected to produce the shipping paper with emergency response information, along with the CDL with hazmat endorsement and required training records. The maintenance log, delivery receipt, and a training certificate alone do not describe the load or its hazards.

Question 26Hazardous Materials Regulations and Definitions

Under the Hazardous Materials Regulations, a material is assigned to a packing group. Which statement correctly describes what packing group assignment communicates about a hazardous material?

  1. It states the maximum quantity that may be carried in one vehicle.
  2. It specifies the placard color that must be used for the shipment.
  3. It identifies the degree of danger the material presents within its hazard class. Correct answer.
  4. It lists the emergency response guidebook number for the material.

Explanation

Packing groups express the relative degree of risk within a hazard class: Packing Group I is great danger, II is medium danger, and III is minor danger. They do not set vehicle quantity limits, guidebook numbers, or placard colors.

Question 27Hazardous Materials Regulations and Definitions

A driver is reviewing shipping papers and sees the hazard class 'Division 6.2' listed for the load. What does this classification tell the driver about the material?

  1. It is a spontaneously combustible solid that ignites in air.
  2. It is an infectious substance capable of causing disease in humans or animals. Correct answer.
  3. It is a corrosive material that attacks metal on contact.
  4. It is a radioactive material requiring exclusive use routing.

Explanation

Division 6.2 covers infectious substances, which are materials known or reasonably expected to contain pathogens that can cause disease in humans or animals. Radioactive material is Class 7, corrosives are Class 8, and spontaneously combustible solids are Division 4.2.

Question 28Hazardous Materials Regulations and Definitions

A driver must know the meaning of the term 'hazmat employee' as used in the Hazardous Materials Regulations. Which description fits that definition?

  1. Any member of the public who signs for a hazardous materials delivery.
  2. A person who directly affects hazardous materials transportation safety, such as a driver, loader, or packager. Correct answer.
  3. Only a person holding a federal inspector credential issued for hazmat enforcement.
  4. Any person who owns stock in a motor carrier that hauls hazardous materials.

Explanation

A hazmat employee is a person who directly affects hazardous materials transportation safety, including drivers, loaders, packagers, and handlers, and who must receive hazmat training. Ownership, federal inspector status, and receipt of a delivery do not define the term.

Question 29Hazardous Materials Regulations and Definitions

A driver is told a shipment is being moved under 'exclusive use.' Which statement best describes what this means for the vehicle?

  1. The vehicle must travel only during daylight hours on approved routes.
  2. The vehicle may carry only that shipper's hazardous materials and no other cargo or passengers. Correct answer.
  3. The vehicle must be escorted by a second commercial vehicle.
  4. The vehicle may carry general freight as long as the hazmat is separated.

Explanation

Exclusive use means the vehicle is used exclusively for that shipment: it carries only the shipper's hazardous materials and no other freight or passengers. It does not impose daylight-only travel, escort vehicles, or permission to mix in general freight.

Question 30Hazardous Materials Regulations and Definitions

A driver is reviewing the four-digit identification number on a package and shipping paper. What does the UN identification number identify?

  1. The weight of the material in the package.
  2. The route the vehicle must follow to its destination.
  3. The manufacturing plant where the material was produced.
  4. The specific hazardous material and its hazard class assignment. Correct answer.

Explanation

The UN identification number is a four-digit code assigned to a specific hazardous material or group of materials and is tied to its hazard class in the Hazardous Materials Table. It does not encode plant of manufacture, routing, or weight.

Question 31Hazardous Materials Regulations and Definitions

A driver is transporting a material assigned to Hazard Class 8. Which hazard should the driver expect from this class of material?

  1. It gives off flammable gas when wet.
  2. It supports combustion and accelerates a fire.
  3. It emits ionizing radiation above background levels.
  4. It can cause corrosion and destroy skin or metal on contact. Correct answer.

Explanation

Class 8 covers corrosive materials that cause visible destruction of, or irreversible alterations to, living tissue or that corrode steel or aluminum. Flammable gas when wet is Division 4.3, oxidizers are Division 5.1, and radiation is Class 7.

Question 32Hazardous Materials Regulations and Definitions

A driver is preparing to transport a hazardous material and must know the role of the Hazardous Materials Table. Which statement best describes its purpose?

  1. It identifies the hazard class, labeling, packaging, and quantity limits for each listed material. Correct answer.
  2. It shows the fuel tax rates that apply to hazmat carriers.
  3. It lists the emergency phone numbers of every carrier in the state.
  4. It records the names of drivers certified to haul hazmat.

Explanation

The Hazardous Materials Table in Part 172 lists regulated materials and provides the information needed for shipping, such as hazard class, labels, packaging authorizations, quantity limits, and special provisions. It is not a directory of carriers, tax rates, or certified drivers.

Question 33Hazardous Materials Regulations and Definitions

A driver is transporting a hazardous material and must determine whether a placard is required. Which factor is the primary basis for that determination?

  1. The number of years the driver has held a CDL.
  2. The color of the vehicle's cab.
  3. The hazard class and quantity of the material being transported. Correct answer.
  4. The state in which the vehicle is registered.

Explanation

Placarding decisions are driven primarily by the hazard class of the material and the quantity being transported, as set out in the placarding tables and rules. Cab color, driver experience, and state of registration do not determine placard requirements.

Question 34Hazardous Materials Regulations and Definitions

A driver is hauling a material that requires placards. The driver stops for a required inspection at a roadside facility. Which statement describes the driver's obligation regarding the shipping papers at that stop?

  1. The driver may lock the papers in the cab and refuse to present them.
  2. The driver may hand over the papers permanently to the inspector.
  3. The driver must make the shipping papers available to the inspecting officer upon request. Correct answer.
  4. The driver must mail the papers to the carrier before the inspection begins.

Explanation

A driver operating a vehicle that requires placards must keep the shipping papers within reach and make them available to authorized officials during inspections. The driver does not surrender them permanently or withhold them.

Question 35Hazardous Materials Regulations and Definitions

A driver is offered a package bearing a Division 2.2 label along with a subsidiary Division 5.1 label. What does the subsidiary label indicate?

  1. The package contains two unrelated materials packed together.
  2. The material has a secondary oxidizer hazard in addition to its primary nonflammable gas hazard. Correct answer.
  3. The primary hazard of the material is oxidizer and the gas label is decorative.
  4. The material is exempt from all labeling requirements.

Explanation

A subsidiary label identifies an additional hazard beyond the primary hazard shown by the primary label. Here the primary hazard is Division 2.2 nonflammable gas, and the subsidiary Division 5.1 label warns of an oxidizer hazard as well.

Question 36Hazardous Materials Regulations and Definitions

A driver is transporting a Class 3 flammable liquid and wants to understand the significance of its flash point of 25 degrees Celsius. What does the flash point describe?

  1. The temperature at which the liquid becomes nonhazardous.
  2. The temperature at which the liquid freezes solid in the tank.
  3. The lowest temperature at which the liquid gives off enough vapor to form an ignitable mixture near its surface. Correct answer.
  4. The temperature at which the liquid will spontaneously ignite without an ignition source.

Explanation

Flash point is the lowest temperature at which a liquid releases enough vapor to form an ignitable mixture with air near its surface. Spontaneous ignition without a source is the autoignition temperature, and freezing or becoming nonhazardous are unrelated concepts.

Question 37Hazardous Materials Regulations and Definitions

A driver notices that a package of hazardous material is missing its required hazard warning label. What is the correct action before the package is loaded?

  1. Load the package and apply the label at the destination.
  2. Refuse to load the package until the required label is applied. Correct answer.
  3. Load the package and note the missing label on the shipping paper.
  4. Cover the missing label area with a blank white sticker.

Explanation

Packages of hazardous materials must bear the required hazard warning labels before they are offered for transport. A driver should not load a package lacking required labels; the deficiency must be corrected first.

Question 38Hazardous Materials Regulations and Definitions

A driver is reviewing a shipping description and sees the word 'RQ' printed before the basic description. What does this notation tell the driver?

  1. The material may be carried only in a cargo tank.
  2. The package has been inspected and released by a federal agency.
  3. The shipment is exempt from placarding requirements.
  4. The material is a reportable quantity of a hazardous substance under CERCLA. Correct answer.

Explanation

The letters RQ on a shipping paper indicate that the material is a hazardous substance and the shipment involves a reportable quantity under CERCLA. It does not grant a placarding exemption, restrict the package type, or indicate a federal release.

Question 39Hazardous Materials Regulations and Definitions

A driver is transporting a Division 4.3 material and must plan for its special hazard. Which precaution is most appropriate for this class?

  1. Keep the material away from all water and moisture, since it releases flammable gas when wet. Correct answer.
  2. Store the material in direct sunlight to keep it dry.
  3. Load the material next to open containers of water for cooling.
  4. Vent the container to allow water vapor to escape.

Explanation

Division 4.3 materials react with water to release flammable gas and must be kept dry and away from moisture sources. Venting to admit vapor, storing in sunlight, or placing water nearby would increase the hazard.

Question 40Hazardous Materials Regulations and Definitions

A driver is transporting a hazardous material that requires placards and is crossing a state line. Which statement about placarding is correct?

  1. Placards must meet the federal requirements and remain displayed regardless of which state the vehicle enters. Correct answer.
  2. Placards may be replaced with handwritten signs in another state.
  3. Placards are required only within the state of origin.
  4. Placards must be removed before crossing a state line.

Explanation

The federal Hazardous Materials Regulations apply across state lines, so required placards must remain displayed and conform to federal specifications regardless of which state the vehicle enters. Handwritten substitutes and origin-only placarding are not permitted.

Question 41Hazardous Materials Regulations and Definitions

A driver discovers that a required placard has fallen off a vehicle carrying a placarded load. What is the correct action?

  1. Replace the missing placard before the vehicle continues in service. Correct answer.
  2. Continue the trip and replace the placard at the next scheduled maintenance.
  3. Remove the remaining placards so the display is uniform.
  4. Record the missing placard on the shipping paper and continue.

Explanation

A vehicle carrying a placarded load must display all required placards while in operation. If one falls off, it must be replaced before the vehicle continues; removing the others or noting it on paperwork does not correct the deficiency.

Question 42Hazardous Materials Regulations and Definitions

A driver is loading a hazardous material and notices the package marking lacks the UN identification number. What does the marking requirement generally call for on nonbulk packages?

  1. The UN identification number must be shown as part of the required package marking. Correct answer.
  2. The identification number is required only on bulk packages.
  3. The identification number is replaced by the carrier's name.
  4. The identification number may be omitted if the driver memorizes it.

Explanation

Nonbulk packages of hazardous materials generally must be marked with the proper shipping name and the UN identification number, among other required markings. The driver's memory or the carrier's name does not substitute, and the requirement is not limited to bulk packages.

Question 43Hazardous Materials Regulations and Definitions

A driver is preparing to load a Division 5.1 oxidizer that requires placarding. Which placard is appropriate for this shipment?

  1. A white placard reading CORROSIVE.
  2. A red placard reading FLAMMABLE.
  3. A yellow placard reading OXIDIZER. Correct answer.
  4. A green placard reading NONFLAMMABLE GAS.

Explanation

Division 5.1 oxidizers are identified by the yellow OXIDIZER placard. Red FLAMMABLE placards are for Class 3, white CORROSIVE for Class 8, and green NONFLAMMABLE GAS for Division 2.2.

Question 44Hazardous Materials Regulations and Definitions

A driver is reviewing a shipment that includes a material listed as a hazardous substance. Which federal law establishes the reportable quantity concept that triggers the RQ notation?

  1. The Motor Carrier Safety Act.
  2. The Clean Air Act.
  3. The Federal Railroad Administration Act.
  4. The Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). Correct answer.

Explanation

CERCLA establishes the reportable quantity framework for hazardous substances, which is why the RQ notation appears on shipping papers. The Clean Air Act, Motor Carrier Safety Act, and railroad legislation do not create the RQ concept used in hazmat shipping descriptions.

Question 45Hazardous Materials Regulations and Definitions

A driver is transporting a hazardous material and wants to confirm the correct basic description format on the shipping paper. Which order is generally required for the basic description?

  1. UN identification number, proper shipping name, hazard class or division, and packing group. Correct answer.
  2. Proper shipping name, carrier name, weight, and route.
  3. Packing group, UN identification number, destination, and quantity.
  4. Hazard class, driver name, vehicle number, and date.

Explanation

The basic description on a shipping paper generally consists of the UN identification number, the proper shipping name, the hazard class or division, and the packing group, in that sequence. Carrier names, driver names, routes, and destinations are not part of the basic description.

Question 46Hazardous Materials Regulations and Definitions

A driver is hauling a Division 1.1 explosive and must understand the operating restrictions that apply. Which statement correctly describes a general operating restriction for Division 1.1 materials?

  1. The vehicle may park overnight in any residential neighborhood.
  2. The vehicle may carry passengers if they sign a waiver.
  3. The vehicle may stop only at locations where the material can be safely attended or secured. Correct answer.
  4. The vehicle may tow a trailer carrying general freight.

Explanation

Division 1.1 explosives carry strict operating rules, including restrictions on parking and on leaving the vehicle unattended; stops are limited to places where the material can be safely attended or secured. Carrying passengers, parking in residential areas, and towing general freight are not permitted under these rules.

Question 47Hazardous Materials Regulations and Definitions

A driver is reviewing the Hazardous Materials Table and sees a plus sign (+) in the first column of an entry. What does that symbol indicate?

  1. The material may be transported without shipping papers.
  2. The material is exempt from all packaging requirements.
  3. The entry is a generic or n.o.s. description that should be used only if no specific entry fits. Correct answer.
  4. The material must always be placarded regardless of quantity.

Explanation

A plus sign in the first column of the Hazardous Materials Table marks an entry as a generic or n.o.s. description that is used only when no more specific entry applies to the material. It does not exempt packaging, waive shipping papers, or force placarding at any quantity.

Question 48Hazardous Materials Regulations and Definitions

A driver is transporting a material whose shipping description includes a special provision number. What is the practical function of a special provision in the Hazardous Materials Table?

  1. It determines the vehicle's registration fee.
  2. It sets the driver's hourly wage for the trip.
  3. It modifies or adds to the requirements that would otherwise apply to that material. Correct answer.
  4. It replaces the hazard class with a generic classification.

Explanation

Special provisions in the Hazardous Materials Table modify, limit, or add to the standard requirements for a material, such as packaging or communication exceptions. They do not replace the hazard class, set wages, or determine registration fees.

Question 49Hazardous Materials Regulations and Definitions

A driver is reviewing a shipping paper for a material that is forbidden for transport. Which statement is correct about materials listed as forbidden in the Hazardous Materials Table?

  1. They may not be offered or transported in commerce. Correct answer.
  2. They may be carried if the carrier signs a liability waiver.
  3. They may be carried only in small quantities without paperwork.
  4. They may be carried if the driver uses extra caution.

Explanation

Materials listed as forbidden in the Hazardous Materials Table may not be offered for transportation or transported in commerce. Extra caution, small quantities, or a liability waiver do not create an exception.

Question 50Hazardous Materials Regulations and Definitions

A driver is transporting a hazardous material and must determine whether the shipment qualifies for a placarding exception based on quantity. Which concept explains why some materials require placards only above a certain weight?

  1. The 100-pound exception applies to all hazard classes without limit.
  2. The placarding tables allow any material to be shipped without placards below 5,000 pounds.
  3. Placards are required only when the vehicle exceeds its gross weight rating.
  4. The 1,001-pound exception applies to certain hazard classes listed in the placarding tables. Correct answer.

Explanation

The placarding rules include a 1,001-pound exception for certain hazard classes listed in the placarding tables, meaning placards are not required below that aggregate weight for those classes. The exception does not apply universally, and placarding is not tied to gross vehicle weight rating.