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NZ Dangerous Goods (D) Endorsement study materials
NZ Dangerous Goods (D) Endorsement study resources

NZ Dangerous Goods (D) Endorsement practice questions

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Question 1Dangerous goods law, classifications and documentation

Under the New Zealand dangerous goods rule for transport by road, which document must accompany a shipment of dangerous goods in quantities above the prescribed thresholds?

  1. A workplace hazard register extract
  2. A transport document containing the required dangerous goods information Correct answer.
  3. A vehicle certificate of fitness
  4. A customs export declaration

Explanation

The rule requires a shipping document (transport document) that carries the UN number, proper shipping name, class, packing group and quantity for each dangerous good. It must travel with the load so that emergency responders and enforcement officers can identify the hazard. A certificate of fitness and a hazard register serve different purposes and do not substitute for it.

Question 2Dangerous goods law, classifications and documentation

A consignment contains a substance assigned to Class 3. What hazard does Class 3 primarily describe?

  1. Toxic substances
  2. Oxidising substances
  3. Corrosive substances
  4. Flammable liquids Correct answer.

Explanation

Class 3 covers flammable liquids, meaning liquids with a low flash point that can give off ignitable vapours. Toxic substances fall in Class 6, oxidisers in Class 5 and corrosives in Class 8. Knowing the class number lets a driver anticipate the emergency response required.

Question 3Dangerous goods law, classifications and documentation

Which packing group is assigned to a dangerous good presenting the greatest degree of danger within its class?

  1. Packing Group IV
  2. Packing Group II
  3. Packing Group I Correct answer.
  4. Packing Group III

Explanation

Packing groups rank danger within a class: Group I is great danger, Group II is medium danger and Group III is minor danger. There is no Packing Group IV in the classification system. The group influences the standard of packaging and sometimes the quantity limits.

Question 4Dangerous goods law, classifications and documentation

What does the UN number printed on a dangerous goods transport document identify?

  1. The New Zealand importer's registration number
  2. The vehicle's certificate of loading
  3. The driver's dangerous goods endorsement number
  4. The specific substance or article in the United Nations classification system Correct answer.

Explanation

A UN number is a four-digit identifier assigned to a specific dangerous substance or article in the UN Model Regulations, which New Zealand's rule draws on. It is the common language between shippers, drivers and emergency services. It is not an administrative or licensing number.

Question 5Dangerous goods law, classifications and documentation

Which class includes substances that are liable to spontaneous heating or to heating on contact with water?

  1. Class 4 Correct answer.
  2. Class 2
  3. Class 9
  4. Class 7

Explanation

Class 4 covers flammable solids and substances liable to spontaneous combustion, including those that emit flammable gas when wet. Class 2 covers gases, Class 7 radioactive material and Class 9 miscellaneous goods. Recognising Class 4 matters because water can worsen some of these incidents.

Question 6Dangerous goods law, classifications and documentation

A driver is handed a transport document for a load of dangerous goods. Which element is required on that document?

  1. The name of the vehicle's insurer
  2. The route the driver intends to take
  3. The consignee's preferred delivery time
  4. The proper shipping name of each dangerous good Correct answer.

Explanation

The transport document must state the proper shipping name together with the UN number, class, packing group and quantity. Delivery preferences, insurer details and route plans are commercial or operational matters and are not required dangerous goods information. Accurate naming lets responders identify the hazard immediately.

Question 7Dangerous goods law, classifications and documentation

What is the purpose of the emergency information required to accompany a dangerous goods load?

  1. To list the vehicle's maintenance history
  2. To confirm the goods have been paid for
  3. To record the driver's hours of work
  4. To guide immediate response actions in an incident involving the goods Correct answer.

Explanation

Emergency information tells the driver and responders what to do if the goods spill, leak or catch fire, including protective actions and first response steps. It is a safety document, not a record of hours, payment or maintenance. Having it immediately available can prevent escalation of an incident.

Question 8Dangerous goods law, classifications and documentation

Which class is used for goods that present a hazard not covered by the other classes, such as environmentally hazardous substances?

  1. Class 6
  2. Class 5
  3. Class 9 Correct answer.
  4. Class 3

Explanation

Class 9 is the miscellaneous class for dangerous goods that present a hazard but do not fit Classes 1 to 8, and it includes environmentally hazardous substances. Classes 6, 5 and 3 cover toxicity, oxidising and flammable liquid hazards respectively. Class 9 still requires proper documentation and marking.

Question 9Dangerous goods law, classifications and documentation

A consignment of petrol is being documented for road transport. Which combination correctly matches the class and the primary hazard?

  1. Class 2, flammable gas
  2. Class 5, oxidising liquid
  3. Class 3, flammable liquid Correct answer.
  4. Class 8, corrosive liquid

Explanation

Petrol is a flammable liquid and is assigned to Class 3 because of its low flash point and ignitable vapours. It is a liquid at ambient conditions, so it is not Class 2, and it is neither a corrosive nor an oxidiser. Correct classification drives the packaging and emergency information provided.

Question 10Dangerous goods law, classifications and documentation

A shipper is preparing a substance that is toxic on inhalation. Which class should appear on the transport document?

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

Explanation

Toxic and infectious substances are placed in Class 6, so a substance toxic on inhalation is documented under that class. Class 4 covers flammable solids, Class 8 corrosives and Class 2 gases. The class shown must reflect the primary hazard of the substance.

Question 11Dangerous goods law, classifications and documentation

A driver notices the transport document lists a UN number but no packing group for a substance that requires one. What is the correct action?

  1. Record the omission in the driver's log and continue
  2. Proceed because the UN number is the only essential field
  3. Add a packing group from memory on the document
  4. Query the documentation before accepting the load Correct answer.

Explanation

The transport document must be complete, and a missing packing group for a substance that requires one is a documentation defect. The driver should raise it with the consignor rather than guess or self-authorise. Proceeding with incomplete information undermines emergency response and compliance.

Question 12Dangerous goods law, classifications and documentation

Which statement correctly describes the relationship between a dangerous goods class and a packing group?

  1. The class identifies the type of hazard, while the packing group ranks the degree of danger within that class Correct answer.
  2. Both the class and the packing group are assigned only to gases
  3. The packing group identifies the type of hazard, while the class ranks the degree of danger
  4. Both the class and the packing group indicate the physical state of the substance

Explanation

Class describes the nature of the hazard, such as flammable, toxic or corrosive, while the packing group grades severity within that class. The two work together to determine packaging and handling requirements. Neither one describes physical state, and both apply across many classes.

Question 13Dangerous goods law, classifications and documentation

A load carries a substance whose correct shipping name differs from the trade name used by the customer. Which name should appear on the transport document?

  1. The customer's trade name
  2. The proper shipping name from the classification Correct answer.
  3. The name used on the purchase order
  4. The manufacturer's brand label

Explanation

The transport document must use the proper shipping name recognised in the classification system, because that is what responders and enforcement officers work from. Trade names, brand labels and purchase-order descriptions can be ambiguous or unfamiliar. Using the proper shipping name ensures the hazard is correctly identified.

Question 14Dangerous goods law, classifications and documentation

What is the main reason the transport document must be kept in a place readily accessible to the driver during the journey?

  1. So it can be produced quickly for enforcement officers and emergency responders Correct answer.
  2. So it can be used as proof of purchase at delivery
  3. So it can replace the vehicle's logbook
  4. So it can be shown to the customer for marketing purposes

Explanation

The document must be immediately available so that police, enforcement officers or emergency services can identify the goods without delay. In an incident, seconds matter and the document may be the only reliable source of hazard information. It is not a purchase record or a substitute for the logbook.

Question 15Dangerous goods law, classifications and documentation

A substance is corrosive to metals and also gives off a flammable gas on contact with water. How should the primary hazard be reflected on the documentation?

  1. By omitting both hazards and relying on the UN number
  2. By the class assigned as the primary hazard, with subsidiary hazards also identified Correct answer.
  3. By recording the hazard on the driver's licence
  4. By listing only the flammable gas hazard

Explanation

Where a substance has more than one hazard, the classification assigns a primary hazard and identifies subsidiary hazards, and the documentation should reflect the classification. Listing only one hazard can mislead responders about the risks. The UN number alone does not describe the hazards.

Question 16Dangerous goods law, classifications and documentation

Which item of information is NOT part of the core dangerous goods description on a transport document?

  1. The vehicle's odometer reading Correct answer.
  2. The proper shipping name
  3. The packing group
  4. The UN number

Explanation

The core description comprises the UN number, proper shipping name, class, packing group and quantity. An odometer reading is a vehicle record and has no bearing on identifying the goods. Including the required elements ensures the document is complete and usable in an emergency.

Question 17Dangerous goods law, classifications and documentation

A consignor offers a load of dangerous goods with no emergency information provided. What is the appropriate response from the driver?

  1. Carry the load and rely on the fire service to identify the goods
  2. Carry the load and write the emergency steps on arrival
  3. Carry the load but avoid populated areas
  4. Decline to carry the load until the required emergency information is supplied Correct answer.

Explanation

Emergency information is a required part of a compliant dangerous goods consignment, and the driver should not accept a load without it. Relying on others to identify the goods delays response and increases risk. Writing information on arrival is too late to be useful during the journey.

Question 18Dangerous goods law, classifications and documentation

Which statement best explains why dangerous goods must be classified before they are packaged and documented?

  1. Classification determines the hazard, packing group and therefore the packaging and information requirements Correct answer.
  2. Classification determines the vehicle's registration category
  3. Classification determines the driver's wage rate
  4. Classification determines the retail price of the goods

Explanation

Classification establishes the class, the packing group and any subsidiary hazards, and those outcomes drive the standard of packaging, marking and documentation. Without classification the shipper cannot know which requirements apply. Price, wages and registration category are unrelated to hazard classification.

Question 19Dangerous goods law, classifications and documentation

A driver is asked to sign for a load where the transport document shows a class that appears inconsistent with the substance's label. What is the safest course of action?

  1. Assume the document is correct and remove the label
  2. Proceed and note the discrepancy only if an incident occurs
  3. Resolve the discrepancy with the consignor before the journey begins Correct answer.
  4. Assume the label is correct and alter the document

Explanation

A discrepancy between the document and the label means the hazard information cannot be trusted, so it must be resolved before transport. Altering either record or ignoring the conflict could lead to the wrong emergency response. The consignor is responsible for providing accurate classification information.

Question 20Dangerous goods law, classifications and documentation

Which class covers substances that can cause severe damage to living tissue on contact?

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

Explanation

Class 8 covers corrosive substances that cause severe damage to living tissue or corrode metals. Class 3 covers flammable liquids, Class 4 flammable solids and Class 9 miscellaneous goods. Correctly identifying corrosives guides the choice of protective equipment and spill response.

Question 21Dangerous goods law, classifications and documentation

A shipper is completing a transport document for a mixed load containing two different dangerous goods. How should the goods be described?

  1. Each dangerous good is separately described with its own UN number, name, class, packing group and quantity Correct answer.
  2. Only the most hazardous good is described, as it governs the whole load
  3. Only the total quantity of the load is recorded
  4. The goods are described collectively as 'dangerous goods' with no further detail

Explanation

Each dangerous good in a mixed consignment requires its own complete description so that every hazard is identifiable. Describing only one item or using a generic term hides hazards from responders. A total quantity alone gives no indication of what is being carried.

Question 22Dangerous goods law, classifications and documentation

Why does the dangerous goods rule set quantity thresholds above which full documentation and marking requirements apply?

  1. To allow drivers to choose which documentation to carry
  2. To exempt small vehicles from all safety obligations
  3. To reduce paperwork for large consignments only
  4. To match regulatory requirements to the level of risk presented by the quantity carried Correct answer.

Explanation

Thresholds scale the regulatory burden to the risk, so very small quantities may be carried under reduced requirements while larger quantities attract full documentation and marking. The intent is proportionate risk management, not administrative convenience. Drivers cannot opt out of obligations that apply to their load.

Question 23Dangerous goods law, classifications and documentation

A consignment is described on the transport document with a proper shipping name and UN number but the class field is blank. Why is this a significant defect?

  1. The class field is optional when the packing group is shown
  2. The class field is only required for Class 1 explosives
  3. The class conveys the nature of the hazard, which the name and number alone may not make clear to responders Correct answer.
  4. The class field is only needed for international shipments

Explanation

The class tells responders what kind of hazard they face, such as flammable, toxic or corrosive, and drives the emergency response. The proper shipping name and UN number identify the substance but do not by themselves communicate the hazard category. The class is required for all applicable classes, not only explosives.

Question 24Dangerous goods law, classifications and documentation

A substance is offered for transport in a packaging that is suitable for Packing Group III, but the classification assigns Packing Group I. What does this indicate?

  1. The packing group should be changed to match the packaging
  2. The packaging standard is inadequate for the degree of danger and the goods should not be carried in it Correct answer.
  3. The packaging is acceptable if the journey is short
  4. The packaging is acceptable because all packing groups use the same standard

Explanation

Packing groups reflect increasing danger from III to I, and packaging must be suitable for the assigned group. Packaging built to a lower group standard does not provide the required level of containment for a Group I substance. The classification is not altered to suit the packaging, and journey length does not change the standard.

Question 25Dangerous goods law, classifications and documentation

Which reasoning best explains why the transport document must travel with the load rather than be sent separately to the consignee?

  1. The document is required only for customs clearance at the border
  2. The document replaces the driver's duty to inspect the load
  3. The document is needed to calculate freight charges at delivery
  4. The hazard information must be available at the point of incident, wherever that occurs Correct answer.

Explanation

An incident can happen anywhere along the route, so the hazard information must be with the goods to be useful to the driver and responders. Sending it ahead leaves the load unidentified while in transit. It is not a freight calculation tool, does not replace load inspection and is not only a border document.

Question 26Dangerous goods law, classifications and documentation

Under the dangerous goods rule set applied to road transport in New Zealand, which document must accompany a fully regulated dangerous goods consignment and be available to the driver?

  1. The customer's purchase order and invoice
  2. A copy of the vehicle's certificate of fitness only
  3. A workplace hazard register extract for the depot
  4. A transport document containing the dangerous goods description and emergency information Correct answer.

Explanation

Fully regulated dangerous goods loads must travel with a transport document that carries the dangerous goods description and emergency information so responders and enforcement officers can act on it. The document is the primary record of what is being carried and how to respond to an incident.

Question 27Dangerous goods law, classifications and documentation

A substance is assigned to Class 4.3 in the dangerous goods classification. Which hazard does this class signal to the driver?

  1. It emits flammable gas when it comes into contact with water Correct answer.
  2. It is infectious to humans and animals
  3. It is an oxidising agent that intensifies fire
  4. It is radioactive above the transport threshold

Explanation

Class 4 covers flammable solids, and Division 4.3 is specifically substances which, in contact with water, emit flammable gases. Drivers must keep such loads dry and away from water and moisture during transport.

Question 28Dangerous goods law, classifications and documentation

Which packing group is used for a substance presenting high danger within its class?

  1. Packing Group X
  2. Packing Group II
  3. Packing Group III
  4. Packing Group I Correct answer.

Explanation

Packing groups rank the degree of danger within a class: Packing Group I is high danger, II is medium danger and III is low danger. The assignment drives the performance standard the packaging must meet.

Question 29Dangerous goods law, classifications and documentation

A driver is loading drums marked with the Class 8 corrosive label. Which hazard should the driver expect from these goods?

  1. They are gases under pressure at ambient temperature
  2. They present a mass explosion hazard
  3. They will ignite spontaneously in air
  4. They can destroy skin on contact and may also corrode metals Correct answer.

Explanation

Class 8 covers corrosive substances, which chemically attack living tissue on contact and can also damage metals and other materials. The class label warns handlers to use protective equipment and prevent leaks onto the vehicle structure.

Question 30Dangerous goods law, classifications and documentation

What does the UN number shown in a dangerous goods description identify?

  1. The vehicle type approved to carry the substance
  2. The specific substance or article as listed in the UN dangerous goods list Correct answer.
  3. The country in which the substance was manufactured
  4. The packing group assigned to the substance

Explanation

A UN number is a four-digit identifier allocated to a specific substance or article in the UN Model Regulations list, which New Zealand dangerous goods rules draw on. It allows the same substance to be recognised consistently across documents, labels and international borders.

Question 31Dangerous goods law, classifications and documentation

A vehicle carrying a fully regulated dangerous goods load is involved in a crash and the driver is incapacitated. Why must the transport document be located so emergency services can find it easily?

  1. It records the vehicle's loading weight for the insurer
  2. It proves the driver holds a dangerous goods endorsement
  3. It tells responders what is being carried and what emergency actions and contacts apply Correct answer.
  4. It lists the delivery schedule for the consignee

Explanation

Emergency responders rely on the transport document to identify the substances involved and to find the emergency information and contacts for the product. If the driver is unable to assist, the document is the only reliable source of that information at the scene.

Question 32Dangerous goods law, classifications and documentation

Which class is assigned to goods that are gases at 20 degrees Celsius and standard pressure, including compressed, liquefied and dissolved gases?

  1. Class 2 Correct answer.
  2. Class 3
  3. Class 9
  4. Class 5.2

Explanation

Class 2 covers gases, divided into compressed, liquefied, dissolved, refrigerated liquefied and aerosols, and also captures gases with flammable, toxic or oxidising hazards. The class is defined by the physical state of the goods at normal ambient conditions.

Question 33Dangerous goods law, classifications and documentation

A consignment of dangerous goods is small enough to fall below the quantity threshold for full regulation. What does this mean for the driver?

  1. Reduced documentation and marking requirements apply, but the goods must still be handled safely Correct answer.
  2. No dangerous goods requirements apply at all to the consignment
  3. The goods may be carried without any packaging
  4. The driver may exceed the normal load limits for the vehicle

Explanation

Quantity thresholds allow small consignments to move with reduced documentation and marking, but the underlying duty to handle dangerous goods safely is not removed. The driver still needs to know the hazards and manage them.

Question 34Dangerous goods law, classifications and documentation

A transport document lists a substance with its proper shipping name, UN number and class, but the consignor has used a trade name instead of the proper shipping name. What is the correct action for the driver?

  1. Accept the load and correct the document at the destination
  2. Accept the load because the UN number is sufficient
  3. Query the description with the consignor before accepting the load Correct answer.
  4. Accept the load and note the trade name in the driver's logbook

Explanation

The proper shipping name is a required element of the dangerous goods description and must be used rather than a trade name. The driver should not accept the load until the documentation correctly identifies what is being carried.

Question 35Dangerous goods law, classifications and documentation

A load contains a substance that is both flammable and toxic. How should the primary hazard be determined for classification and labelling?

  1. Record only the hazard with the highest packing group number
  2. Apply the precedence rules of the dangerous goods list to establish the primary hazard, with the other shown as subsidiary Correct answer.
  3. Record only the hazard the driver considers most likely to occur
  4. Show both hazards with equal prominence and no primary hazard

Explanation

Where a substance has more than one hazard, the dangerous goods list and the class precedence rules determine which is the primary hazard and which are subsidiary risks. The label and document reflect that hierarchy so responders prioritise correctly.

Question 36Dangerous goods law, classifications and documentation

A consignor offers a substance for which the correct packing group is II, but the packaging supplied is only tested to Packing Group III performance. What should happen?

  1. The load may proceed if the driver reduces the vehicle speed
  2. The load may proceed if the packaging is marked with the correct UN number
  3. The consignment must not be carried until packaging meeting Packing Group II performance is used Correct answer.
  4. The load may proceed because packing group is only advisory

Explanation

Packaging must meet the performance standard for the packing group assigned to the substance, so Packing Group III packaging cannot lawfully hold a Packing Group II substance. The consignment must be repacked before transport.

Question 37Dangerous goods law, classifications and documentation

Why must a dangerous goods transport document be retained after the journey is complete?

  1. To satisfy the consignee's invoicing requirements
  2. To serve as the driver's proof of employment
  3. To provide a record of the dangerous goods carried that can be checked after an incident or by an enforcement officer Correct answer.
  4. To replace the vehicle's maintenance records

Explanation

Retaining the document gives a traceable record of what dangerous goods moved on which journey, which supports incident investigation and enforcement checks. It complements, but does not replace, other operational records.

Question 38Dangerous goods law, classifications and documentation

A driver is offered a load of dangerous goods where the transport document shows no emergency information and the driver cannot contact the consignor. What is the appropriate response?

  1. Accept the load and rely on the label on the drums
  2. Accept the load because emergency information is optional for road transport
  3. Do not accept the load until compliant emergency information is provided Correct answer.
  4. Accept the load and prepare a handwritten note of the UN numbers

Explanation

Emergency information must accompany a dangerous goods load and the driver should not proceed without it. Without it, responders at an incident lack the guidance needed to protect people and property.

Question 39Dangerous goods law, classifications and documentation

Which statement best explains why classification must be completed before packaging is selected for a dangerous goods consignment?

  1. Classification determines the delivery route the vehicle must use
  2. Classification determines the class, packing group and therefore the packaging performance standard required Correct answer.
  3. Classification determines the driver's wage rate for the journey
  4. Classification determines the vehicle's registration category

Explanation

The class and packing group that come out of classification set which packaging standard applies, along with marking and documentation requirements. Selecting packaging before classification would risk using packaging that is not permitted for the substance.

Question 40Dangerous goods law, classifications and documentation

A transport document shows a UN number and proper shipping name, but the class field is blank. What is the correct interpretation for the driver?

  1. The class is only needed for international shipments
  2. The class field is optional where a packing group is shown
  3. The description is incomplete and the load should not be accepted until the class is entered Correct answer.
  4. The class can be inferred from the UN number so the document is acceptable

Explanation

The class is a core element of the dangerous goods description and its absence makes the document incomplete. The driver should not accept the load until the document properly describes the goods.

Question 41Dangerous goods law, classifications and documentation

A consignment contains two different dangerous goods with different UN numbers. How should they be described on the transport document?

  1. Only the substance with the highest packing group is listed
  2. Each substance is listed separately with its own complete dangerous goods description Correct answer.
  3. The two substances are combined under a single UN number for the load
  4. Only the total quantity of dangerous goods is recorded

Explanation

Each dangerous good in a mixed load must be individually described with its proper shipping name, UN number, class, packing group and quantity. Responders need to know every substance present, not just the most hazardous one.

Question 42Dangerous goods law, classifications and documentation

A driver collects a load where the transport document class appears inconsistent with the labels visible on the packages. What is the safest course of action?

  1. Assume the labels are correct and proceed
  2. Resolve the discrepancy with the consignor before the vehicle leaves Correct answer.
  3. Assume the document is correct and proceed
  4. Remove the labels so the load matches the document

Explanation

A mismatch between the document and the package labels means the driver cannot be certain what is being carried or how to respond to an incident. The discrepancy must be resolved before transport begins, and tampering with labels is never acceptable.

Question 43Dangerous goods law, classifications and documentation

Which piece of information belongs in the core dangerous goods description on a transport document?

  1. The consignee's telephone number
  2. The driver's home address
  3. The packing group where one is assigned to the substance Correct answer.
  4. The vehicle's odometer reading

Explanation

The core description comprises the proper shipping name, UN number, class and, where assigned, the packing group, together with the quantity. Commercial and personal details are not part of that description.

Question 44Dangerous goods law, classifications and documentation

A substance reacts violently with water and is also corrosive. Which classification consideration is most important for the driver when planning the journey?

  1. The primary hazard determined by the precedence rules, because it drives the label and the emergency response priority Correct answer.
  2. The colour of the substance, because it indicates the hazard
  3. The packaging colour, because it indicates the packing group
  4. The consignee's preferred delivery time, because it affects the route

Explanation

Where multiple hazards exist, the precedence rules set the primary hazard, which determines the label and the priority for emergency response. The driver needs to know that priority so that water contact, for example, is avoided and responders act correctly.

Question 45Dangerous goods law, classifications and documentation

Why does the dangerous goods rule set apply quantity thresholds before full documentation and marking requirements are triggered?

  1. To allow dangerous goods to be carried without any safety precautions
  2. To remove the need for classification of any substance
  3. To proportion regulatory burden to risk so small quantities can move efficiently while larger quantities face full controls Correct answer.
  4. To exempt all dangerous goods carried in vans

Explanation

Thresholds balance the cost of compliance against the risk posed by the quantity carried, so minor quantities move with reduced formality. Once the threshold is exceeded, the full documentation, marking and packaging requirements apply.

Question 46Dangerous goods law, classifications and documentation

A driver is asked to accept a load where the transport document gives a class that does not match the known properties of the substance named. What is the correct action?

  1. Accept the load and record the discrepancy in the logbook
  2. Do not accept the load and refer the discrepancy back to the consignor for correction Correct answer.
  3. Accept the load because the driver is not responsible for classification
  4. Accept the load and rely on the emergency information alone

Explanation

The driver is entitled to rely on a document that accurately describes the goods, and a known mismatch means the description is unreliable. The load should be held until the consignor corrects the classification and documentation.

Question 47Dangerous goods law, classifications and documentation

Two substances in the same class have different packing groups. What does this difference indicate about how they must be packaged?

  1. Both substances may use identical packaging because they share a class
  2. The lower danger substance requires the more demanding packaging
  3. Packing group differences affect labelling only, not packaging
  4. The higher danger substance requires packaging tested to a more demanding performance level Correct answer.

Explanation

Packing group reflects the degree of danger within a class, and packaging must be tested to the performance level for that group. A higher danger substance therefore needs more demanding packaging than a lower danger one in the same class.

Question 48Dangerous goods law, classifications and documentation

A consignor proposes to send dangerous goods with the emergency information stored only on a phone app that the driver may not be able to open after a crash. What is the main problem with this approach?

  1. The app cannot be updated when the product changes
  2. The app cannot display UN numbers correctly
  3. Emergency information must be available at the scene without reliance on a device that may be damaged or inaccessible Correct answer.
  4. Phone apps are prohibited for all commercial documentation

Explanation

Emergency information must be usable by responders at the scene, where a driver may be incapacitated and devices may be damaged. Relying solely on a phone app fails that requirement because access cannot be guaranteed.

Question 49Dangerous goods law, classifications and documentation

A substance is listed with a subsidiary risk in addition to its primary class. Why does the transport document and labelling show both?

  1. Subsidiary risks indicate the substance has no primary hazard
  2. Subsidiary risks determine the packing group independently
  3. Responders must know the primary hazard for priority action and the subsidiary risk for secondary precautions Correct answer.
  4. Subsidiary risks are shown only to satisfy the consignor's insurer

Explanation

The primary hazard sets the priority response, while subsidiary risks warn of additional dangers such as toxicity alongside flammability. Showing both gives responders a complete picture for protective measures.

Question 50Dangerous goods law, classifications and documentation

Why is the proper shipping name preferred over a manufacturer's brand name on a dangerous goods transport document?

  1. Brand names are always longer and harder to read
  2. The proper shipping name is the recognised identifier tied to the UN listing, so it means the same thing to every responder Correct answer.
  3. Brand names cannot be printed on transport documents
  4. Proper shipping names are required only for exports

Explanation

The proper shipping name links the consignment to a specific UN listing and its associated hazards and response guidance. A brand name may mean nothing outside the company, so responders cannot rely on it.