I85PREP
⌘ K
Ireland ADR Driver study materials
Ireland ADR Driver study resources

Ireland ADR Driver practice questions

One question at a time. Build your Ireland ADR Driver understanding.

First 50 of 200 questions. Each one lists the choices, the correct answer, and an explanation. The checker at the top of this page saves progress in this browser when it is available.

Continue in the practice tool above to load more questions, 50 at a time.

Question 1ADR - Carriage of Dangerous Goods by Road

Under ADR, which document must accompany a road vehicle carrying dangerous goods in packages as the primary transport document?

  1. The CMR consignment note only
  2. The vehicle registration certificate
  3. The driver's tachograph record sheet
  4. The dangerous goods transport document Correct answer.

Explanation

ADR requires a dangerous goods transport document to accompany every consignment of dangerous goods, setting out information such as the UN number, proper shipping name, class, packing group and total quantity. The CMR note, registration certificate and tachograph sheets serve other purposes and cannot replace it.

Question 2ADR - Carriage of Dangerous Goods by Road

A package of dangerous goods bears the UN packaging symbol. What does this marking indicate?

  1. The package may be carried without any danger labels
  2. The contents have been certified as non-hazardous by the consignor
  3. The packaging is suitable only for air transport
  4. The packaging has been tested and approved to a UN performance standard Correct answer.

Explanation

The UN packaging symbol shows that the packaging design has passed the performance tests required by ADR for its packing group and type. It says nothing about whether labels are required, and it is a road, rail and sea marking rather than an air-only one.

Question 3ADR - Carriage of Dangerous Goods by Road

Which class number in ADR covers flammable liquids such as petrol and diesel?

  1. Class 2
  2. Class 5.1
  3. Class 3 Correct answer.
  4. Class 8

Explanation

Class 3 is the ADR class for flammable liquids, covering substances with a flash point of 60 °C or below, which includes petrol and diesel. Class 2 covers gases, Class 5.1 oxidising substances and Class 8 corrosive substances.

Question 4ADR - Carriage of Dangerous Goods by Road

What is the purpose of the orange-coloured plates displayed on a vehicle carrying dangerous goods?

  1. To show the vehicle's maximum authorised mass
  2. To identify the hazard and substance to emergency responders Correct answer.
  3. To indicate that the vehicle is exempt from tunnel restrictions
  4. To record the date of the vehicle's last ADR inspection

Explanation

Orange plates give the hazard identification number and UN number so that emergency services can identify the load quickly at an incident. They do not convey weight, exemption status or inspection dates.

Question 5ADR - Carriage of Dangerous Goods by Road

Which firefighting medium is generally appropriate for a small spill fire involving a Class 3 flammable liquid?

  1. Compressed air
  2. Dry powder or foam Correct answer.
  3. Wet sand only
  4. A direct jet of water

Explanation

Dry powder and foam are the usual media for flammable liquid fires because they smother the surface and suppress vapour. A direct water jet can spread the burning liquid, while sand and compressed air are not recognised extinguishing agents for this hazard.

Question 6ADR - Carriage of Dangerous Goods by Road

When must a driver carry a valid ADR training certificate?

  1. Only when carrying dangerous goods in tanks
  2. Only on international journeys
  3. Only when the vehicle is over 7.5 tonnes
  4. Whenever the journey involves carriage of dangerous goods within scope of ADR Correct answer.

Explanation

ADR requires the driver of a vehicle carrying dangerous goods within scope to hold a valid ADR training certificate covering the relevant classes. The requirement is not limited by vehicle weight, tank carriage or whether the journey crosses a border.

Question 7ADR - Carriage of Dangerous Goods by Road

What does the hazard identification number 33 on an orange plate indicate?

  1. A corrosive liquid that reacts with water
  2. A very highly flammable liquid Correct answer.
  3. A toxic substance with no secondary hazard
  4. An oxidising gas under pressure

Explanation

In the hazard identification number system, the digit 3 denotes a flammable liquid, and doubling it emphasises an increased flammability hazard. Hence 33 identifies a very highly flammable liquid, typically with a low flash point.

Question 8ADR - Carriage of Dangerous Goods by Road

A driver discovers a leaking package during a journey. What is the first priority under ADR emergency guidance?

  1. Increase speed to reach the nearest depot
  2. Open the package to identify the contents
  3. Continue to the destination to save time
  4. Stop, secure the area and keep ignition sources away Correct answer.

Explanation

On discovering a leak, the driver should stop in a safe place, keep people away, eliminate ignition sources and warn other road users before seeking assistance. Continuing the journey, opening the package or speeding up all increase the risk.

Question 9ADR - Carriage of Dangerous Goods by Road

What information must appear on the danger label affixed to a package of dangerous goods?

  1. The vehicle's registration number
  2. The driver's certificate number
  3. The consignee's telephone number
  4. The hazard class number and the label's symbol Correct answer.

Explanation

A danger label displays the hazard symbol and the class number, with the class number shown in the bottom corner. Consignee contact details, driver certificate numbers and vehicle registrations are not part of the label.

Question 10ADR - Carriage of Dangerous Goods by Road

A vehicle carrying dangerous goods enters a tunnel subject to the ADR restriction code (B). What is the effect?

  1. The vehicle is prohibited from using the tunnel if carrying goods forbidden under category B Correct answer.
  2. The vehicle may use the tunnel if escorted by another vehicle
  3. The vehicle may use the tunnel only at night
  4. The vehicle may use the tunnel without restriction

Explanation

Tunnel restriction code B prohibits the passage of vehicles carrying dangerous goods that fall within the restricted categories for that tunnel. Night-time use, escort vehicles and unrestricted passage do not override the category restriction.

Question 11ADR - Carriage of Dangerous Goods by Road

Which of the following best describes the role of a dangerous goods safety adviser (DGSA) for a road haulier?

  1. To approve packaging designs for UN certification
  2. To drive vehicles carrying the most hazardous loads
  3. To monitor compliance and advise on the carriage of dangerous goods Correct answer.
  4. To issue ADR driver certificates on behalf of the authority

Explanation

The DGSA monitors and advises on compliance with the rules governing carriage of dangerous goods, including classification, packaging, documentation and training. The role is advisory and does not include driving, issuing certificates or certifying packaging.

Question 12ADR - Carriage of Dangerous Goods by Road

What is the main purpose of the instructions in writing carried on an ADR vehicle?

  1. To record the driver's daily rest periods
  2. To provide emergency information to the driver and responders Correct answer.
  3. To certify the vehicle's annual roadworthiness test
  4. To list the route the driver must follow

Explanation

The instructions in writing give the driver and emergency responders the hazard information and the actions to take after an incident or accident. They are not route plans, rest records or test certificates.

Question 13ADR - Carriage of Dangerous Goods by Road

A load of UN 1203 (petrol) is being carried in packages. Which combination of information must appear on the transport document?

  1. Only the consignor's name and address
  2. Only the trade name of the product
  3. Only the total mass of the load
  4. UN number, proper shipping name, class and packing group Correct answer.

Explanation

The transport document must show the UN number, the proper shipping name, the hazard class and, where assigned, the packing group, together with the quantity. A trade name alone, the mass alone or the consignor's details alone are insufficient.

Question 14ADR - Carriage of Dangerous Goods by Road

Why must a vehicle carrying dangerous goods be fitted with a suitable fire extinguisher?

  1. To replace the need for emergency services
  2. To satisfy insurance requirements only
  3. To allow the driver to tackle a small fire at its early stage Correct answer.
  4. To cool the vehicle's braking system

Explanation

ADR requires firefighting equipment so that the driver can attack a small fire immediately while it is still manageable and before the emergency services arrive. It is a safety requirement, not merely an insurance formality, and it never replaces calling the fire service.

Question 15ADR - Carriage of Dangerous Goods by Road

Which statement correctly describes a limited quantity (LQ) consignment under ADR?

  1. It may only be carried in tanks
  2. It is exempt from all ADR requirements
  3. It requires orange plates on every vehicle
  4. It benefits from certain relaxations when the package quantities are within the LQ limits Correct answer.

Explanation

Limited quantity provisions allow reduced requirements, for example on documentation and labelling, provided each package stays within the prescribed quantity limits and the package bears the limited quantity mark. The goods remain dangerous goods and are not exempt from all rules.

Question 16ADR - Carriage of Dangerous Goods by Road

What does the packing group assigned to a substance indicate?

  1. The number of labels required on the vehicle
  2. The degree of danger presented by the substance within its class Correct answer.
  3. The maximum speed at which it may be transported
  4. The size of the package in which it may be carried

Explanation

Packing groups I, II and III reflect the degree of danger within a class, with group I representing the greatest hazard. They guide the choice of packaging performance level rather than package size, speed limits or vehicle labelling.

Question 17ADR - Carriage of Dangerous Goods by Road

A driver is loading packages bearing a Class 8 label. Which precaution is most appropriate?

  1. Keep them separated from foodstuffs and check for leaks before loading Correct answer.
  2. Stack them against packages of Class 3 liquids to save space
  3. Place them next to the vehicle's exhaust system
  4. Load them loose so they can move freely in transit

Explanation

Corrosive substances must be kept away from foodstuffs to prevent contamination and should be inspected for damage or leakage before loading. Segregation from incompatible goods and secure stowage away from heat sources are also required.

Question 18ADR - Carriage of Dangerous Goods by Road

What does the figure '2' shown in the lower half of a Class 2.1 label indicate?

  1. The maximum filling ratio of the cylinder
  2. The number of the hazard class Correct answer.
  3. The weight of the package in kilograms
  4. The month of the last inspection

Explanation

The number in the bottom corner of a danger label identifies the hazard class, so 2 indicates Class 2 gases. The subsidiary hazard, filling ratio or package weight is not shown by this figure.

Question 19ADR - Carriage of Dangerous Goods by Road

Which action best reflects the requirement for supervision of a vehicle carrying high-consequence dangerous goods when parked?

  1. Leaving the vehicle unattended in a public car park overnight
  2. Parking in a secure area or arranging supervision where required Correct answer.
  3. Parking close to a residential building for convenience
  4. Leaving the engine running while the driver rests

Explanation

ADR requires vehicles carrying certain high-risk loads to be supervised or parked securely in a suitable location. Unattended public parking, parking near buildings and idling the engine all increase the risk of theft, fire or exposure.

Question 20ADR - Carriage of Dangerous Goods by Road

How often must a driver's ADR training certificate generally be renewed in Ireland?

  1. Every year
  2. Every three years
  3. Every five years Correct answer.
  4. It never expires once issued

Explanation

An ADR driver training certificate is valid for five years, after which refresher training and re-examination are required for renewal. Annual and three-yearly renewal periods do not apply, and the certificate does not last indefinitely.

Question 21ADR - Carriage of Dangerous Goods by Road

A vehicle carrying dangerous goods is involved in a collision and one package is damaged. Which sequence best reflects correct post-incident action?

  1. Warn other traffic, keep ignition sources away, notify the emergency services and record details Correct answer.
  2. Photograph the scene and leave before the authorities arrive
  3. Restart the vehicle immediately to test for damage
  4. Move the damaged package to the roadside, then continue the journey

Explanation

After an incident the driver should secure the scene, warn others, eliminate ignition sources, contact the emergency services and provide the instructions in writing, then report the incident. Moving damaged packages, leaving the scene or restarting the vehicle prematurely can worsen the danger.

Question 22ADR - Carriage of Dangerous Goods by Road

Which of the following is a subsidiary hazard indicated on a danger label?

  1. An additional risk besides the main hazard class Correct answer.
  2. The primary class of the substance
  3. The packing group of the substance
  4. The UN number of the substance

Explanation

A subsidiary hazard label shows an additional risk, such as toxicity or corrosivity, that accompanies the primary hazard class. The primary class, packing group and UN number are shown elsewhere or by other markings.

Question 23ADR - Carriage of Dangerous Goods by Road

A consignment is offered as 'limited quantity' but the individual packages exceed the LQ quantity limit. What is the correct outcome?

  1. The packages may be split and carried without documentation
  2. The goods must be carried under the full ADR requirements Correct answer.
  3. The LQ relaxations still apply because the mark is present
  4. The driver may refuse to accept the transport document

Explanation

LQ relaxations apply only when each package is within the prescribed quantity limit; exceeding the limit removes the benefit and the goods must be carried under the full ADR regime. A limited quantity mark alone does not confer the relaxations, and splitting packages does not remove the documentation requirement.

Question 24ADR - Carriage of Dangerous Goods by Road

A driver must decide whether a load of UN 1263 (paint) may pass through a tunnel marked with category D. Which factor is decisive?

  1. The time of day of the journey
  2. The quantity and category of the dangerous goods carried Correct answer.
  3. The driver's years of experience
  4. The colour of the vehicle

Explanation

Tunnel restrictions are applied according to the category of the tunnel and the quantity and category of the dangerous goods being carried. Vehicle colour, driver experience and time of day do not determine whether passage is permitted.

Question 25ADR - Carriage of Dangerous Goods by Road

A driver notices that the transport document lists a substance under a trade name with no UN number. What is the appropriate response?

  1. Refuse to carry any dangerous goods in future
  2. Query the documentation before loading and require the proper shipping information Correct answer.
  3. Label the packages from memory based on the trade name
  4. Accept the load and write the UN number on arrival

Explanation

The transport document must contain the UN number, proper shipping name, class and packing group, so a trade name alone is non-compliant and must be queried before loading. Adding details on arrival, refusing all future work or guessing labels from memory are not acceptable practices.

Question 26ADR - Carriage of Dangerous Goods by Road

Under ADR, which document is the primary source of information about the dangerous goods being carried and must accompany the consignment by road?

  1. The vehicle registration certificate
  2. The transport document (dangerous goods declaration) Correct answer.
  3. The driver's tachograph record sheet
  4. The goods vehicle test certificate

Explanation

ADR requires that dangerous goods carried by road be accompanied by a transport document containing the prescribed particulars for the consignment. It is the principal means by which carriers, drivers and emergency responders identify what is on board. Other vehicle and driver documents serve different legal purposes and do not describe the goods.

Question 27ADR - Carriage of Dangerous Goods by Road

In ADR, what does the term 'packing group' relate to?

  1. The training level held by the driver
  2. The size of the vehicle permitted to carry the goods
  3. The degree of danger presented by a substance within its class Correct answer.
  4. The number of packages allowed per transport unit

Explanation

Packing groups I, II and III express the degree of danger within a class, with I being the greatest danger. They are assigned to substances of certain classes, principally Classes 3, 4, 5, 6.1, 8 and 9. They guide the choice of packaging and certain exemptions.

Question 28ADR - Carriage of Dangerous Goods by Road

A vehicle carrying dangerous goods is parked overnight at a public roadside. Which ADR requirement applies to the vehicle in this situation?

  1. The vehicle must be parked with the engine running for the alarm system
  2. The vehicle must be supervised at all times by the driver
  3. The vehicle must be parked in a secure area or otherwise supervised as required Correct answer.
  4. The vehicle must be left with its hazard warning panel removed

Explanation

ADR requires that vehicles carrying dangerous goods be adequately supervised or parked in a secure location when left unattended. Supervision may be by a person or by suitable measures such as a fenced, lit depot. The aim is to prevent unauthorised access and interference.

Question 29ADR - Carriage of Dangerous Goods by Road

What is the purpose of the orange-coloured plate displayed on the front and rear of a tank vehicle?

  1. To show the vehicle's maximum authorised weight
  2. To indicate that the vehicle is exempt from tunnel restrictions
  3. To identify the hazard and the substance carried to emergency responders Correct answer.
  4. To record the date of the last periodic inspection

Explanation

Orange plates on tank vehicles carry a hazard identification number on top and the UN number below. Together they allow emergency services to identify the substance and its principal hazards without opening documents. They are required for tanks, battery vehicles and certain bulk carriage.

Question 30ADR - Carriage of Dangerous Goods by Road

Under ADR, who is responsible for ensuring that the driver holds a valid ADR training certificate before a loaded vehicle sets off?

  1. The consignee only
  2. The carrier (operator) Correct answer.
  3. The driver alone
  4. The filler alone

Explanation

ADR assigns to the carrier the duty to ensure the driver has received the required training and holds a valid certificate for the class carried. The driver must also carry the certificate, but the primary obligation to check rests with the operator. Consignors and fillers have their own defined duties.

Question 31ADR - Carriage of Dangerous Goods by Road

Which item of equipment must be carried on a vehicle carrying dangerous goods in packages in accordance with ADR?

  1. A high-visibility warning triangle and a torch Correct answer.
  2. A calibrated breathalyser for the driver
  3. A wheel chock of suitable size for the vehicle
  4. A spare set of orange plates for each trailer

Explanation

ADR specifies a list of equipment including a warning triangle, wheel chocks, eye rinsing liquid and a torch, with quantities depending on the vehicle. This equipment supports safe conduct and emergency response. It must be kept accessible in the vehicle cab.

Question 32ADR - Carriage of Dangerous Goods by Road

What does a Class 3 label on a package indicate?

  1. Toxic gas
  2. Oxidising substance
  3. Corrosive substance
  4. Flammable liquid Correct answer.

Explanation

Class 3 covers flammable liquids, and the label shows a flame symbol with the figure 3 in the bottom corner. The class number in the lower half of the label identifies the class to which the substance belongs. Corrosives are Class 8 and oxidisers Class 5.1.

Question 33ADR - Carriage of Dangerous Goods by Road

What is the correct way to secure packages of dangerous goods in a vehicle for carriage by road?

  1. Restrained to prevent movement and damage during transport Correct answer.
  2. Loosely loaded so that the driver can inspect them easily
  3. Stacked so that labels are hidden from view
  4. Placed directly against the vehicle's heating system

Explanation

ADR requires that packages be stowed and secured so that they cannot shift, fall or be damaged during the journey. Labels must remain visible, and packages must be kept away from sources of heat and ignition. Good securing also protects against leakage caused by friction or impact.

Question 34ADR - Carriage of Dangerous Goods by Road

A driver is checking a consignment where the transport document shows a substance assigned to Class 6.1, packing group I. What does this tell the driver about the load?

  1. It is a highly toxic substance requiring the greatest care Correct answer.
  2. It is a flammable gas with a low flashpoint
  3. It is a mildly corrosive liquid with low risk
  4. It is an oxidising solid of medium danger

Explanation

Class 6.1 covers toxic substances, and packing group I denotes the highest degree of danger within that class. Such goods demand strict handling, segregation and emergency precautions. The driver should treat leaks or spills as a serious health hazard.

Question 35ADR - Carriage of Dangerous Goods by Road

A driver finds that a package of dangerous goods has begun to leak inside the vehicle during a journey. Which action is most consistent with ADR emergency instructions?

  1. Stop in a safe place, keep clear, and follow the instructions in writing Correct answer.
  2. Open the package to identify the substance by smell
  3. Continue to the destination and report the leak on arrival
  4. Wash the leak away with water before continuing

Explanation

The instructions in writing give the driver a defined sequence: stop safely, avoid ignition sources, keep people away and notify the emergency services. The driver should not attempt to handle the substance personally. Continuing the journey or improvising risks injury and spreading contamination.

Question 36ADR - Carriage of Dangerous Goods by Road

Which statement correctly describes carriage under the ADR 'limited quantities' provisions?

  1. Packages must bear the limited quantity mark and total quantities per transport unit are capped Correct answer.
  2. The driver must hold an ADR certificate for every limited quantity load
  3. The goods are exempt from all ADR requirements
  4. No hazard labels are needed on the packages

Explanation

Limited quantity carriage permits reduced requirements provided each package carries the prescribed mark and the total quantity per transport unit stays within the limit. It is a relaxation, not a total exemption. Some provisions, such as driver training for the task, still apply.

Question 37ADR - Carriage of Dangerous Goods by Road

A driver is about to load packages bearing a Class 8 label alongside foodstuffs intended for human consumption. Which precaution is most appropriate?

  1. Load them together provided the vehicle doors are closed
  2. Load them together only if the journey is under one hour
  3. Keep the corrosive packages separated from the foodstuffs to prevent contamination Correct answer.
  4. Load the foodstuffs above the corrosive packages to save space

Explanation

ADR requires segregation of dangerous goods from foodstuffs where contamination could occur. Corrosive substances can leak and render food unfit or dangerous. Separation protects public health regardless of journey length.

Question 38ADR - Carriage of Dangerous Goods by Road

A driver carrying a load of dangerous goods in packages approaches a tunnel marked with restriction category C. Which factor determines whether the vehicle may enter?

  1. The colour of the vehicle cab
  2. The driver's years of experience
  3. The total quantity of dangerous goods carried and their classification Correct answer.
  4. The number of axles on the vehicle

Explanation

Tunnel categories restrict passage according to the dangerous goods carried, using quantity thresholds and the classification of the load. Category C is more restrictive than D or E. Drivers must check the transport document against the tunnel restrictions before entering.

Question 39ADR - Carriage of Dangerous Goods by Road

Under ADR, which party is responsible for classifying a dangerous substance and providing the correct UN number and proper shipping name?

  1. The tunnel operator
  2. The consignor Correct answer.
  3. The tyre fitter
  4. The vehicle mechanic

Explanation

The consignor must ensure the goods are correctly classified, described and documented before offering them for carriage. The transport document particulars flow from this duty. Carriers and drivers rely on that information to select equipment and comply with restrictions.

Question 40ADR - Carriage of Dangerous Goods by Road

A driver is shown a package bearing a label with a flame over a circle and the figure 5.1. What hazard does this indicate?

  1. Flammable solid
  2. Oxidising substance Correct answer.
  3. Radioactive material
  4. Organic peroxide

Explanation

Class 5.1 covers oxidising substances, whose label shows a flame over a circle with the class number 5.1. Oxidisers can intensify fire and may react violently with combustible material. They must be kept away from flammable goods and heat.

Question 41ADR - Carriage of Dangerous Goods by Road

What is the principal function of a dangerous goods safety adviser (DGSA) appointed by a road haulier?

  1. To issue ADR driver certificates on behalf of the authority
  2. To drive vehicles carrying the most hazardous loads
  3. To monitor compliance and advise on the safe carriage of dangerous goods Correct answer.
  4. To classify goods for the consignor

Explanation

The DGSA monitors and advises on compliance with dangerous goods rules, prepares reports and helps the undertaking improve safety. The role is advisory and monitoring, not operational driving. Certification of drivers is a matter for the competent authority.

Question 42ADR - Carriage of Dangerous Goods by Road

A consignment of dangerous goods is to travel through a tunnel with restriction code D. Which statement best reflects the driver's obligation?

  1. Passage is restricted only for goods above defined quantity thresholds or of particular classes Correct answer.
  2. Passage is allowed if the driver switches on the hazard lights
  3. Only empty vehicles are permitted through a category D tunnel
  4. Any quantity of any dangerous goods may pass freely through a category D tunnel

Explanation

Tunnel category D restricts passage for dangerous goods that exceed certain quantity thresholds or belong to specified classes. It is less restrictive than category C but still requires the driver to check the load against the rules. Free passage applies only where the load falls outside the restrictions.

Question 43ADR - Carriage of Dangerous Goods by Road

Under ADR, what is required of the driver regarding the 'instructions in writing' before starting a journey with dangerous goods?

  1. They must be kept in the cab and be readily available during the journey Correct answer.
  2. They must be handed to the tunnel operator at each tunnel
  3. They must be posted to the consignee in advance
  4. They must be locked in the vehicle's external toolbox

Explanation

The instructions in writing must be carried in the vehicle cab and be immediately available to the driver and emergency services. They set out the actions to take in an accident or emergency. Keeping them elsewhere defeats their purpose.

Question 44ADR - Carriage of Dangerous Goods by Road

A driver is carrying a load that includes a substance whose transport document shows the tunnel restriction code (B1000C). What does the code tell the driver?

  1. The load is restricted only from tunnels built before 1990
  2. The code refers to the vehicle's braking system
  3. The vehicle may use any tunnel in Europe
  4. The load is restricted from tunnels of category B and above under the specified conditions Correct answer.

Explanation

Tunnel restriction codes combine a letter and a quantity figure that determine which tunnel categories the load may not enter. The letter B with a quantity limit means the restriction applies above that threshold for the relevant categories. The driver must compare the load with the code before route planning.

Question 45ADR - Carriage of Dangerous Goods by Road

A driver is asked to accept a package that is visibly damaged and leaking before loading. What is the correct response under ADR?

  1. Wrap it in plastic and load it as normal
  2. Refuse to load it and report the defect to the responsible person Correct answer.
  3. Load it at the rear of the vehicle away from the cab
  4. Accept it and note the damage on the transport document

Explanation

Damaged or leaking packages must not be loaded, as they present an immediate risk of exposure, fire or contamination. The driver should refuse the package and report the defect so the consignor can deal with it. Accepting it, even with a note, does not make carriage safe or compliant.

Question 46ADR - Carriage of Dangerous Goods by Road

Which of the following best describes the purpose of the hazard identification number shown in the upper half of an orange plate?

  1. It indicates the nature and severity of the hazard of the substance Correct answer.
  2. It gives the vehicle's registration year
  3. It records the driver's certificate number
  4. It shows the quantity of goods in the tank

Explanation

The hazard identification number uses digits to signal the type of hazard, such as flammability or toxicity, with doubling of a digit indicating intensification. It is read together with the UN number below to identify the substance and its dangers. This helps emergency responders decide on control measures.

Question 47ADR - Carriage of Dangerous Goods by Road

A consignor offers a substance for carriage but the transport document omits the packing group. Which statement is correct?

  1. The omission is acceptable because packing groups are optional
  2. The packing group is only needed for tank carriage
  3. The omission is a defect that must be corrected before carriage Correct answer.
  4. The driver may add the packing group from memory

Explanation

Where ADR assigns a packing group, it must appear in the transport document along with the UN number and proper shipping name. An incomplete document is a compliance defect that should be corrected before the journey begins. The driver should not guess or amend technical particulars without authority.

Question 48ADR - Carriage of Dangerous Goods by Road

A driver is planning a route and needs to know whether a load of Class 2 gas in a tank may pass through a particular tunnel. Which combination of information is essential?

  1. The vehicle's fuel consumption and tyre pressure
  2. The tunnel category and the tunnel restriction code or quantity of the load Correct answer.
  3. The consignee's opening hours and telephone number
  4. The driver's home address and licence number

Explanation

Tunnel passage depends on the tunnel's assigned category and the dangerous goods restriction code or quantity carried. The driver must compare these before entering. Other operational details do not affect the legal restriction.

Question 49ADR - Carriage of Dangerous Goods by Road

Under ADR, which statement correctly describes the relationship between the transport document and the instructions in writing?

  1. The transport document is only needed when the instructions are lost
  2. The instructions in writing replace the transport document for tank vehicles
  3. The transport document identifies the goods, while the instructions in writing guide emergency action Correct answer.
  4. They are the same document under different names

Explanation

The transport document gives the particulars of the consignment for identification and regulatory purposes. The instructions in writing set out the actions the driver and others should take in an emergency. Both must be carried, and they serve distinct functions.

Question 50ADR - Carriage of Dangerous Goods by Road

A driver carrying a load of dangerous goods is stopped by an inspector. The driver produces a valid ADR certificate, but the transport document shows a proper shipping name that does not match the UN number given. What is the most likely consequence?

  1. The discrepancy is ignored because the certificate is valid
  2. The driver may correct the UN number on the spot
  3. The consignment is treated as non-compliant and may be prohibited from continuing Correct answer.
  4. The vehicle is automatically confiscated

Explanation

The UN number and proper shipping name must correspond correctly in the transport document. A mismatch means the goods are not properly described, which is a compliance failure that can lead to prohibition of carriage until corrected. A valid driver certificate does not cure a documentation defect.