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California CDL HazMat Endorsement Test study materials
California CDL HazMat Endorsement Test study resources

California CDL HazMat Endorsement Test practice questions

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Question 1Hazardous Materials Regulations, Definitions, and Communication Rules

Under the hazardous materials regulations, what does the term "hazmat employee" describe?

  1. A person who directly affects hazardous materials transportation safety in the course of employment Correct answer.
  2. A person who only loads non-regulated cargo at a terminal
  3. A person who owns the vehicle used to haul hazardous materials
  4. A person who inspects cargo tanks once every five years

Explanation

A hazmat employee is anyone whose job directly affects hazardous materials transportation safety, including loading, unloading, handling, inspecting, and driving. This definition triggers training and testing requirements before the employee may perform those functions.

Question 2Hazardous Materials Regulations, Definitions, and Communication Rules

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

  1. A driver's logbook page
  2. A bill of lading listing only the total weight
  3. A vehicle registration card
  4. A shipping paper containing the required hazardous materials description Correct answer.

Explanation

A shipping paper must accompany hazardous materials shipments and include the basic description: proper shipping name, hazard class, identification number, and packing group where applicable. It is the core communication document for emergency responders and carriers.

Question 3Hazardous Materials Regulations, Definitions, and Communication Rules

How are hazard classes shown on a shipping paper for a regulated hazardous material?

  1. By a numeric or named hazard class as required in the basic description Correct answer.
  2. By the driver's initials
  3. By the vehicle's gross weight
  4. By the color of the paper

Explanation

The basic description on a shipping paper includes the hazard class, shown as a number or name such as Class 3 or Class 8. This lets carriers and responders identify the hazard quickly.

Question 4Hazardous Materials Regulations, Definitions, and Communication Rules

A driver is hauling a material that requires placards. When must the placards be displayed?

  1. At all times the vehicle contains the material, including while parked in transit Correct answer.
  2. Only after the driver reaches the delivery point
  3. Only when the vehicle is empty
  4. Only when driving at night

Explanation

Placards must be displayed on the vehicle whenever it contains a material requiring placards, including while parked in transit. They warn responders and the public of the hazard at all times.

Question 5Hazardous Materials Regulations, Definitions, and Communication Rules

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

  1. To record fuel purchases
  2. To verify the driver's medical certificate
  3. To provide guidance for handling accidents, spills, and exposure involving the material Correct answer.
  4. To list the carrier's insurance coverage

Explanation

Emergency response information gives responders and drivers guidance on fire, spill, and exposure situations for the specific material. It must be carried with the shipping paper or otherwise immediately available.

Question 6Hazardous Materials Regulations, Definitions, and Communication Rules

Which item is part of the basic description required on a shipping paper for a hazardous material?

  1. The carrier's fuel type
  2. The proper shipping name Correct answer.
  3. The vehicle's tire size
  4. The driver's home address

Explanation

The basic description includes the proper shipping name, hazard class, identification number, and packing group when applicable. These elements let responders identify the material and its hazards.

Question 7Hazardous Materials Regulations, Definitions, and Communication Rules

What does a four-digit identification number on a shipping paper or orange panel represent?

  1. The driver's employee identification number
  2. The vehicle's license plate number
  3. The carrier's DOT operating authority number
  4. A specific hazardous material in the hazardous materials table Correct answer.

Explanation

The four-digit identification number, such as UN1203, corresponds to a specific entry in the hazardous materials table. It allows responders to identify the material quickly.

Question 8Hazardous Materials Regulations, Definitions, and Communication Rules

Who is responsible for ensuring that hazardous materials are properly classed and described before transport?

  1. The fuel station attendant
  2. The shipper offering the material for transportation Correct answer.
  3. The tire technician
  4. The receiving dock worker only

Explanation

The shipper is responsible for properly classifying, packaging, marking, labeling, and describing the hazardous material before offering it for transport. Errors in classification can create serious safety and legal problems.

Question 9Hazardous Materials Regulations, Definitions, and Communication Rules

A driver is reviewing a shipping paper and sees the entry "UN1203, Gasoline, 3, PG II." Which element identifies the hazard class?

  1. Gasoline
  2. 3 Correct answer.
  3. UN1203
  4. PG II

Explanation

In the basic description, the hazard class follows the proper shipping name; here "3" is the flammable liquid class. UN1203 is the identification number and PG II is the packing group.

Question 10Hazardous Materials Regulations, Definitions, and Communication Rules

What does the packing group assigned to a hazardous material indicate?

  1. The degree of danger within a hazard class Correct answer.
  2. The number of placards required
  3. The route the driver must take
  4. The size of the shipping container

Explanation

Packing groups I, II, and III reflect the degree of danger within a hazard class, with I being the greatest danger. They influence packaging and stowage requirements.

Question 11Hazardous Materials Regulations, Definitions, and Communication Rules

A driver picks up a load that requires placards but the shipper has not supplied them. What should the driver do?

  1. Use handwritten paper signs
  2. Ignore the requirement because the shipper is responsible
  3. Refuse to move the load until the required placards are obtained Correct answer.
  4. Proceed and placard the vehicle only if stopped

Explanation

The driver must not transport a placarded load without the required placards; the vehicle must be properly placarded before movement. The driver should resolve the missing placards with the shipper before departing.

Question 12Hazardous Materials Regulations, Definitions, and Communication Rules

When must emergency response information be immediately available during transport?

  1. Only when the material is in a cargo tank
  2. Only during daylight hours
  3. At all times the hazardous material is present in the vehicle Correct answer.
  4. Only when the vehicle crosses a state line

Explanation

Emergency response information must be immediately available whenever the hazardous material is in the vehicle, so responders can use it at the scene. It is often carried with the shipping paper.

Question 13Hazardous Materials Regulations, Definitions, and Communication Rules

A shipping paper lists two hazardous materials. How should the basic descriptions be presented?

  1. The entries may be omitted if the load is small
  2. Only one entry is needed for the entire load
  3. The entries may be combined into one name
  4. Each material must have its own complete basic description entry Correct answer.

Explanation

Each hazardous material on a shipping paper needs its own basic description with proper shipping name, class, ID number, and packing group. Combining entries would obscure the hazards from responders.

Question 14Hazardous Materials Regulations, Definitions, and Communication Rules

What is the role of hazard warning labels on packages of hazardous materials?

  1. They show the package's shipping cost
  2. They list the consignee's phone number
  3. They record the date of manufacture
  4. They identify the hazard class of the material inside Correct answer.

Explanation

Hazard warning labels are applied to packages and communicate the hazard class, such as corrosive or flammable, to handlers. They complement markings and placards in the communication system.

Question 15Hazardous Materials Regulations, Definitions, and Communication Rules

A driver is asked to sign a shipping paper that lacks the hazard class for a regulated material. What is the safest action?

  1. Sign it and let the receiver correct it later
  2. Add the class from memory and sign
  3. Refuse to sign but still haul the load
  4. Ask the shipper to correct the description before accepting the load Correct answer.

Explanation

The shipping paper must contain a complete basic description before transport, so the driver should have the shipper correct it. Accepting an incomplete paper leaves the vehicle without required hazard communication.

Question 16Hazardous Materials Regulations, Definitions, and Communication Rules

Which placard would be appropriate for a vehicle carrying a flammable liquid in a quantity requiring placarding?

  1. A radioactive placard
  2. A flammable placard Correct answer.
  3. An oxidizer placard
  4. A corrosive placard

Explanation

The placard must match the hazard class of the material; a flammable liquid requires a flammable placard. Placards communicate the specific hazard to responders.

Question 17Hazardous Materials Regulations, Definitions, and Communication Rules

What must a hazmat employer do before allowing an employee to perform hazmat functions?

  1. Require the employee to purchase their own safety gear
  2. Issue the employee a commercial driver's license
  3. Provide required training and testing and certify the employee Correct answer.
  4. Register the employee with the state highway patrol

Explanation

Hazmat employers must train employees on the regulations and safety, test them, and certify that they are qualified before they perform hazmat functions. Retraining is required periodically.

Question 18Hazardous Materials Regulations, Definitions, and Communication Rules

A driver is transporting a material requiring placards and stops at a restaurant. What is the correct practice regarding the placards?

  1. Remove the placards to avoid attracting attention
  2. Cover the placards with a tarp
  3. Turn the placards inward
  4. Leave the placards displayed while the material remains on the vehicle Correct answer.

Explanation

Placards must remain displayed whenever the vehicle contains the material, including during stops. Removing or covering them would hide the hazard from responders.

Question 19Hazardous Materials Regulations, Definitions, and Communication Rules

How does the hazardous materials table help a shipper prepare a shipment?

  1. It records vehicle maintenance schedules
  2. It provides highway maps for routing
  3. It lists required shipping names, classes, ID numbers, labels, and packing groups for each material Correct answer.
  4. It lists driver pay scales

Explanation

The hazardous materials table is the primary reference for proper shipping names, hazard classes, identification numbers, label codes, packing groups, and special provisions. Shippers use it to build the required description and packaging.

Question 20Hazardous Materials Regulations, Definitions, and Communication Rules

A shipping paper shows a material with no packing group listed. What is the most likely reason?

  1. The shipper forgot to fill it in
  2. The driver must assign one
  3. The material's entry does not require a packing group Correct answer.
  4. The material is not hazardous

Explanation

Some hazardous materials entries do not require a packing group, so the column is left blank. Whether a packing group applies is determined by the material's table entry.

Question 21Hazardous Materials Regulations, Definitions, and Communication Rules

A driver is hauling a placarded load and the shipping paper is inside a sealed envelope in the cab. Why is this a problem?

  1. The paper must be stored in the trailer
  2. The paper must be immediately available to responders and inspectors Correct answer.
  3. The paper must be mailed to the receiver
  4. The paper must be destroyed after delivery

Explanation

Shipping papers for hazardous materials must be immediately accessible to emergency responders and inspectors during transport. Sealing them away delays access when seconds matter.

Question 22Hazardous Materials Regulations, Definitions, and Communication Rules

A vehicle carries two materials, one requiring placards and one that does not. What is the general placarding consideration?

  1. The required placard for the material that needs one must be displayed Correct answer.
  2. Only the unregulated material's name is posted
  3. No placards are needed because one material is unregulated
  4. Placards are needed only if both materials require them

Explanation

Placarding is determined by the materials present that require placards; the presence of a non-placarded material does not cancel the requirement. The vehicle must display placards for the material that triggers the requirement.

Question 23Hazardous Materials Regulations, Definitions, and Communication Rules

A shipper offers a material under a trade name only, with no proper shipping name on the paper. Why is this unacceptable?

  1. The driver is expected to translate trade names
  2. Trade names are allowed only for liquids
  3. Trade names are too long for the form
  4. The shipping paper must use the proper shipping name from the hazardous materials table Correct answer.

Explanation

The basic description must use the proper shipping name recognized in the hazardous materials table, not a marketing or trade name. Responders rely on standardized names to identify hazards.

Question 24Hazardous Materials Regulations, Definitions, and Communication Rules

During a roadside inspection, an officer finds the placards do not match the shipping paper's hazard class. What is the core safety concern?

  1. The paperwork may be misfiled
  2. The vehicle may be overweight
  3. The driver may have exceeded hours of service
  4. Responders could use the wrong protective actions for the actual hazard Correct answer.

Explanation

Placards and shipping papers must agree so responders can identify the hazard and choose correct protective actions. A mismatch could lead to inappropriate equipment or tactics at an incident.

Question 25Hazardous Materials Regulations, Definitions, and Communication Rules

A driver must decide whether a material is regulated based on the shipping paper. Which approach reflects the regulations?

  1. Ask the receiver after delivery
  2. Rely on the odor of the material
  3. Treat any material named on a hazmat shipping paper as regulated unless the entry shows otherwise Correct answer.
  4. Assume materials are unregulated unless the driver recognizes them

Explanation

The shipping paper's basic description identifies regulated hazardous materials, and the driver should follow the paper and table entry rather than personal assumptions. Recognition by smell or memory is unreliable and unsafe.

Question 26Hazardous Materials Regulations, Definitions, and Communication Rules

Under the hazardous materials regulations, which definition best describes a hazardous material?

  1. Any item that a carrier chooses to insure for a higher declared value
  2. Any product that is sold in a container larger than one gallon
  3. Any material that requires a Material Safety Data Sheet at a jobsite
  4. A substance or material capable of posing an unreasonable risk to health, safety, and property when transported in commerce Correct answer.

Explanation

The regulations define a hazardous material as a substance or material that the Secretary of Transportation has determined is capable of posing an unreasonable risk to health, safety, and property when transported in commerce. That regulatory definition is what triggers the classing, communication, and training requirements. Commercial factors such as package size, jobsite paperwork, or insurance value do not create or remove hazmat status.

Question 27Hazardous Materials Regulations, Definitions, and Communication Rules

A driver is offered a package marked with a hazard label, but the shipping paper contains no emergency response telephone number. What is the correct understanding of the requirement?

  1. The number may be omitted whenever the package carries a hazard label
  2. A telephone number must be listed that can be contacted during transport for emergency response information Correct answer.
  3. The number is required only for international shipments
  4. The carrier's dispatch number always satisfies the requirement automatically

Explanation

A shipping paper for a hazardous material must include an emergency response telephone number that is monitored at all times while the material is in transport, and the person listed must have access to the required emergency response information. The requirement applies to domestic shipments and does not depend on whether a label is present. A dispatch line satisfies it only if it truly meets the monitoring and information-access conditions.

Question 28Hazardous Materials Regulations, Definitions, and Communication Rules

A shipper offers a material whose proper shipping name appears on the shipping paper, but the hazard class column is blank. How should the driver treat this shipment?

  1. Refuse to accept it until the shipping paper is corrected and complete Correct answer.
  2. Accept it because the proper shipping name is present
  3. Accept it and write in the hazard class from memory
  4. Accept it if the package bears the correct label

Explanation

A shipping paper must present a complete basic description, which includes the hazard class in addition to the identification number, proper shipping name, and packing group where applicable. A driver should not accept a shipment with an incomplete description, because the paperwork is the primary communication tool for emergency responders and inspectors. The shipper must correct the document before the material moves.

Question 29Hazardous Materials Regulations, Definitions, and Communication Rules

A carrier loads a vehicle with a single hazardous material in a quantity that requires placarding, and the shipper has applied the correct placard. During the trip, the driver notices the placard has become partially detached and is unreadable. What is the appropriate action?

  1. Cover the placard with tape until the next scheduled inspection
  2. Continue the trip and note the damage in the delivery paperwork
  3. Replace or repair the placard so it remains legible before continuing Correct answer.
  4. Remove the damaged placard entirely to avoid displaying incorrect information

Explanation

Placards must remain legible and properly displayed throughout transport, so a carrier that discovers a damaged or missing placard must restore it before continuing. Placarding communicates the hazard to emergency responders and inspectors, and an unreadable placard defeats that purpose. Documenting the damage or covering it does not satisfy the display requirement.

Question 30Hazardous Materials Regulations, Definitions, and Communication Rules

A driver receives a shipping paper listing a hazardous material by its proper shipping name, hazard class, and packing group. Under the hazardous materials regulations, what is this combination called?

  1. The compatibility group listing
  2. The basic description Correct answer.
  3. The placard specification
  4. The emergency response guide entry

Explanation

The regulations require shipping papers to present hazardous materials in a set sequence: proper shipping name, hazard class or division, and packing group, with the identification number also required. This required sequence is referred to as the basic description. It gives inspectors and emergency responders a consistent way to read the entry.

Question 31Hazardous Materials Shipping Papers, Marking, Labeling, and Placarding

When a driver transports a hazardous material that requires shipping papers, where must the papers be kept while the vehicle is moving?

  1. In a pouch on the driver's door or in clear view within reach of the driver Correct answer.
  2. Locked in the cargo compartment with the load
  3. Mailed to the receiver before departure
  4. Stored in the glove box of any trailing vehicle

Explanation

Shipping papers must be readily accessible to the driver and to emergency responders during transport. The standard practice is a pouch on the driver's door or a location in clear view within immediate reach while belted in. They may not be stored where the driver cannot reach them quickly.

Question 32Hazardous Materials Shipping Papers, Marking, Labeling, and Placarding

What is the basic description order required on a hazardous materials shipping paper?

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

Explanation

The basic description follows a set sequence: identification number, then proper shipping name, then hazard class or division, then packing group. Following this order lets responders read the key facts in a predictable place. Additional information such as quantity may follow.

Question 33Hazardous Materials Shipping Papers, Marking, Labeling, and Placarding

A shipping paper entry shows the proper shipping name in a highlighted or contrasting color. What does this indicate?

  1. The entry is a duplicate and can be discarded
  2. The material may be hauled without placards
  3. The shipment has already been inspected by a federal officer
  4. The material is a hazardous material and the entry is being distinguished from non-hazardous entries Correct answer.

Explanation

When hazardous and non-hazardous materials appear on the same shipping paper, hazardous entries must be distinguished, commonly by highlighting, contrasting color, or another approved method. This helps responders find hazardous entries fast. It does not change placarding duties.

Question 34Hazardous Materials Shipping Papers, Marking, Labeling, and Placarding

Who is responsible for providing the shipping papers and the required emergency response information to the driver?

  1. The vehicle mechanic
  2. The driver personally
  3. The receiver
  4. The shipper Correct answer.

Explanation

The shipper prepares the shipping paper and must furnish emergency response information for the material being offered. The carrier and driver must then keep that documentation with the shipment. The receiver does not create the outbound paperwork.

Question 35Hazardous Materials Shipping Papers, Marking, Labeling, and Placarding

Which document is acceptable as emergency response information for a hazardous materials shipment?

  1. An emergency response guidebook page or a carrier-provided emergency response plan covering the material Correct answer.
  2. A verbal briefing from the dispatcher
  3. A bill of lading with no hazard data
  4. A blank sheet of company letterhead

Explanation

Emergency response information must be in writing and include the nature of the hazard, fire and spill response guidance, and first aid measures. An ERG page or an approved emergency response plan satisfies this. A verbal briefing alone does not.

Question 36Hazardous Materials Shipping Papers, Marking, Labeling, and Placarding

A driver is hauling a material whose placard is required. When must the placards be affixed?

  1. Only when driving at night
  2. Only after the vehicle leaves the shipper's property line
  3. Before the vehicle is loaded, or as soon as the material is loaded, and kept on until unloaded and placards removed Correct answer.
  4. Only when the vehicle crosses a state border

Explanation

Placards must be in place before or immediately when the hazardous material is loaded and must remain until the material is unloaded. They are not tied to property lines, darkness, or state borders. Proper timing keeps the vehicle correctly marked whenever the hazard is aboard.

Question 37Hazardous Materials Shipping Papers, Marking, Labeling, and Placarding

How many placards are generally required on a trailer or cargo tank for a given hazard?

  1. Two on the driver's side only
  2. One on each side and one on each end Correct answer.
  3. One on the front only
  4. One on the rear only

Explanation

Placards are displayed on both sides and both ends of the transport vehicle or bulk package. This gives responders a view from any approach direction. The front of a tractor is not a required placard location.

Question 38Hazardous Materials Shipping Papers, Marking, Labeling, and Placarding

A vehicle carries 1,100 pounds of a material in Table 2 (placarding threshold 1,001 pounds) in non-bulk packages. What placarding is required?

  1. The material must be placarded because the quantity exceeds 1,001 pounds Correct answer.
  2. Placarding is optional at the driver's discretion
  3. Only a DANGEROUS placard is required
  4. No placard is required because it is under 5,000 pounds

Explanation

Table 2 materials require placards when the aggregate gross weight reaches 1,001 pounds or more. At 1,100 pounds the threshold is met, so the placard must be displayed. The 5,000-pound figure applies to Table 1 any-quantity rules, not Table 2.

Question 39Hazardous Materials Shipping Papers, Marking, Labeling, and Placarding

What does the DANGEROUS placard indicate?

  1. The load contains only consumer commodities
  2. The load contains a single corrosive material
  3. The load is empty and residue-free
  4. The load contains two or more categories of hazardous materials that require different placards Correct answer.

Explanation

The DANGEROUS placard may be used when a vehicle carries two or more hazard categories that each require a placard, in place of displaying every individual placard. It signals a mixed hazardous load. It is not used for a single hazard class.

Question 40Hazardous Materials Shipping Papers, Marking, Labeling, and Placarding

A bulk package such as a cargo tank is marked with a placard. Where else must the identification number of the material appear?

  1. Only on the driver's manifest copy
  2. Only on the shipping paper
  3. On orange panels or on the placards themselves, visible on both sides and both ends Correct answer.
  4. Only on the bill of lading

Explanation

Bulk packages and transport vehicles carrying them must display the four-digit identification number, typically on orange panels or on the placards. It must be visible from both sides and both ends. Paperwork alone does not satisfy the marking rule.

Question 41Hazardous Materials Shipping Papers, Marking, Labeling, and Placarding

What information must appear on a hazardous materials placard?

  1. The driver's license number
  2. The hazard class name or symbol, the four-digit identification number when required, and the hazard class number Correct answer.
  3. The receiver's purchase order number
  4. The shipper's phone number and address

Explanation

Placards identify the hazard through the class name or symbol and the class number, and bulk shipments also show the identification number. They do not carry personal or commercial data. The placard's purpose is rapid hazard recognition.

Question 42Hazardous Materials Shipping Papers, Marking, Labeling, and Placarding

A driver picks up a shipment of a Table 1 material in any quantity. What placarding rule applies?

  1. The placard is required only above 1,001 pounds
  2. The placard is required regardless of quantity Correct answer.
  3. The placard is required only above 5,000 pounds
  4. The placard is never required for Table 1 materials

Explanation

Table 1 lists materials that must be placarded in any quantity, such as certain explosives and poison gases. There is no weight threshold for these. Table 2 uses the 1,001-pound aggregate threshold.

Question 43Hazardous Materials Shipping Papers, Marking, Labeling, and Placarding

A driver discovers that a required placard has fallen off during the trip. What should the driver do?

  1. Cover the missing spot with tape
  2. Remove the remaining placards to match
  3. Replace the placard before continuing, using an available spare or obtaining one Correct answer.
  4. Continue to the destination and report it at delivery

Explanation

The vehicle must remain properly placarded whenever the material is aboard, so a missing placard must be restored before continuing. Carriers commonly stock spare placards for this reason. Continuing unplacarded exposes the driver to citation.

Question 44Hazardous Materials Shipping Papers, Marking, Labeling, and Placarding

Which marking is required on a non-bulk package containing a hazardous material?

  1. The proper shipping name and identification number, plus the required labels Correct answer.
  2. Only the shipper's logo
  3. Only the gross weight
  4. Only the receiver's address

Explanation

Non-bulk packages must be marked with the proper shipping name and identification number and must bear the required hazard labels. These markings let handlers identify the contents without opening the package. Address and weight alone are not hazard markings.

Question 45Hazardous Materials Shipping Papers, Marking, Labeling, and Placarding

What is the purpose of a hazard label on a package?

  1. To show the package's shipping cost
  2. To record the package's expiration date
  3. To indicate the package has been opened
  4. To identify the hazard class of the material inside the package Correct answer.

Explanation

Labels are smaller versions of hazard communication applied to packages, showing the hazard class through color, symbol, and text. They warn handlers of the risk before the package is opened. Cost and dates are unrelated to labels.

Question 46Hazardous Materials Shipping Papers, Marking, Labeling, and Placarding

A driver must know the hazard class of a material from the shipping paper. Which entry element provides this?

  1. The freight bill number
  2. The total quantity column
  3. The hazard class or division number shown in the basic description Correct answer.
  4. The shipper's emergency phone number

Explanation

The hazard class or division, such as 3 or 8, appears within the basic description and tells the driver what kind of hazard the material presents. Quantity, phone numbers, and bill numbers do not convey the hazard class.

Question 47Hazardous Materials Shipping Papers, Marking, Labeling, and Placarding

A shipping paper lists a material with packing group II. What does the packing group indicate?

  1. The route the vehicle must take
  2. The size of the package
  3. The number of placards needed
  4. The degree of danger within the hazard class Correct answer.

Explanation

Packing groups rank the relative danger within a hazard class, with I being greatest and III least. They guide packaging strength and handling care. They do not set package size, routing, or placard count.

Question 48Hazardous Materials Shipping Papers, Marking, Labeling, and Placarding

When may a driver use the EMPTY placard on a cargo tank?

  1. When the tank contains only residue of a hazardous material and has not been cleaned Correct answer.
  2. When the tank is being repaired in a shop
  3. When the tank is full of a hazardous material
  4. When the tank carries a non-hazardous product

Explanation

The EMPTY placard signals that a bulk package still holds hazardous residue but no longer carries a full load. It must not be used when the tank is full or when it has been cleaned and purged. The placard warns responders that residue hazard remains.

Question 49Hazardous Materials Shipping Papers, Marking, Labeling, and Placarding

A shipper offers a hazardous material in a package bearing no required labels. What should the driver do?

  1. Accept it because labels are optional
  2. Accept it and note the problem on the bill of lading
  3. Refuse the shipment until it is properly marked and labeled Correct answer.
  4. Accept it and label the package at the first stop

Explanation

The driver should not accept improperly marked or labeled hazardous packages, because the defect signals a breakdown in required hazard communication. Accepting the load shifts the compliance problem onto the driver and carrier. Labels are mandatory, not optional.

Question 50Hazardous Materials Shipping Papers, Marking, Labeling, and Placarding

What does a four-digit UN identification number on a shipping paper identify?

  1. The driver's endorsement
  2. The vehicle's registration
  3. The specific hazardous material Correct answer.
  4. The shipping company

Explanation

The UN identification number is a four-digit code tied to a specific hazardous material, such as UN1203 for gasoline. It lets responders look up the exact substance and its hazards. It is not a company or vehicle identifier.