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DGSA RID Rail study materials
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DGSA RID Rail practice questions

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Question 1Legal framework and regulatory obligations (RID, EU Directive 2008/68/EC, national implementing law, DGSA role and duties)

Which EU legal instrument makes the RID rules applicable to the transport of dangerous goods by rail within the Union?

  1. Regulation (EC) No 1272/2008 (CLP), which classifies dangerous goods for rail
  2. Directive 2008/68/EC, which applies RID through its Annex II Correct answer.
  3. A CEN standard adopted by the European Committee for Standardization
  4. The COTIF Convention alone, without any EU implementing instrument

Explanation

Directive 2008/68/EC establishes uniform EU rules for inland transport of dangerous goods and applies RID through its Annex II. The CLP Regulation deals with classification, labelling and packaging rather than carriage rules, while COTIF is given effect in the EU through the directive. CEN standards are technical documents and are not the legal source of the RID obligations.

Question 2Legal framework and regulatory obligations (RID, EU Directive 2008/68/EC, national implementing law, DGSA role and duties)

Under RID 1.8.3.1, which undertaking active in rail transport must appoint at least one dangerous goods safety adviser?

  1. An undertaking that consigns, packs, loads, fills or unloads by rail Correct answer.
  2. Only the operator of a marshalling yard that stores loaded wagons overnight
  3. Only the train driver who physically moves the wagons on the main line
  4. Only a consignee that never handles the goods at its premises

Explanation

RID 1.8.3.1 requires each undertaking whose activities include consigning, packing, loading, filling or unloading of dangerous goods by rail to appoint one or more safety advisers. The obligation attaches to those operational roles, not to the train driver as such or to a consignee that does not handle the goods. It is the undertaking, not the individual worker, that must make the appointment.

Question 3Legal framework and regulatory obligations (RID, EU Directive 2008/68/EC, national implementing law, DGSA role and duties)

What is the primary purpose of the dangerous goods safety adviser function in an undertaking?

  1. To replace the undertaking's responsibility for safe loading operations
  2. To issue statutory transport permits on behalf of the competent authority
  3. To help the undertaking prevent accidents and comply with dangerous goods rules Correct answer.
  4. To certify the technical design of tank wagons before they enter service

Explanation

The safety adviser's role is advisory and monitoring: helping the undertaking comply with RID and preventing incidents in its dangerous goods activities. Certification of tank wagons and issue of transport permits belong to competent authorities or notified bodies. Appointing an adviser does not transfer the undertaking's legal responsibility for safe operations.

Question 4Legal framework and regulatory obligations (RID, EU Directive 2008/68/EC, national implementing law, DGSA role and duties)

Which statement correctly describes the vocational training certificate that a dangerous goods safety adviser must hold under RID?

  1. It is issued by the competent authority after an examination Correct answer.
  2. It is valid only for road transport and can never be used to cover rail activities
  3. It is issued by the undertaking's own management after internal training has been completed
  4. It is issued by a trade association and requires no formal examination at all

Explanation

RID 1.8.3.2 requires the safety adviser to hold a vocational training certificate issued by the competent authority following an examination. The certificate is a public credential, not an internal employer document. Depending on the examination passed, it may cover rail and, where applicable, other inland transport modes.

Question 5Legal framework and regulatory obligations (RID, EU Directive 2008/68/EC, national implementing law, DGSA role and duties)

RID requires the safety adviser to prepare an annual report for the undertaking's management. What should that report cover?

  1. The undertaking's annual financial statements and tax declarations
  2. The individual driving hours of every train driver employed by the company
  3. The timetable planning for all freight trains operated in the previous financial year
  4. Measures taken to ensure compliance and a description of dangerous goods activities Correct answer.

Explanation

The annual report is a compliance and safety document: it summarises the undertaking's dangerous goods transport activities and the measures taken to ensure compliance, and it may include accident and incident information. Financial statements, driver hours and timetable planning fall outside its purpose. The report is addressed to management so that corrective action can be taken.

Question 6Legal framework and regulatory obligations (RID, EU Directive 2008/68/EC, national implementing law, DGSA role and duties)

Under Directive 2008/68/EC, may a Member State authorise national rail transport of dangerous goods that does not fully comply with RID?

  1. No, because RID is directly applicable and permits no deviation
  2. No, because only the European Parliament can derogate from RID
  3. Yes, for national carriage, subject to notification and non-discriminatory rules Correct answer.
  4. Yes, but only if the Commission issues a prior authorisation for each consignment

Explanation

Article 6 of Directive 2008/68/EC allows Member States to lay down less stringent or specific requirements for national transport of dangerous goods, subject to notification to the Commission and review. Such national measures must not create arbitrary discrimination or affect international carriage governed by RID. The Commission does not authorise each individual consignment.

Question 7Legal framework and regulatory obligations (RID, EU Directive 2008/68/EC, national implementing law, DGSA role and duties)

What does Directive 2008/68/EC require of Member States regarding penalties for breaches of the national rules implementing it?

  1. Penalties must be effective, proportionate and dissuasive Correct answer.
  2. Penalties must be limited to administrative warnings for first offences
  3. Only criminal imprisonment may be imposed for any infringement
  4. Member States may choose to provide no penalty for national transport

Explanation

The directive requires effective, proportionate and dissuasive penalties for infringement of the national provisions adopted under it. It does not prescribe one single type of sanction, so neither warnings-only nor imprisonment-only regimes are mandated. Member States must ensure that the penalties are actually applied.

Question 8Legal framework and regulatory obligations (RID, EU Directive 2008/68/EC, national implementing law, DGSA role and duties)

RID 1.8.3.3 sets out the tasks of the safety adviser. Which of the following is one of those tasks?

  1. Monitoring the practices and procedures used in the undertaking's dangerous goods activities Correct answer.
  2. Negotiating freight rates with customers for dangerous goods traffic
  3. Driving the train when dangerous goods are carried
  4. Approving the construction drawings of tank wagons on behalf of the competent authority

Explanation

The safety adviser's tasks include monitoring compliance and the practices and procedures used in the undertaking's dangerous goods activities, advising on training and investigating accidents. Approving tank wagon design, driving trains and negotiating freight rates are not safety adviser tasks under RID. Those functions belong to other roles or authorities.

Question 9Legal framework and regulatory obligations (RID, EU Directive 2008/68/EC, national implementing law, DGSA role and duties)

An undertaking appoints an external dangerous goods safety adviser. Does that appointment transfer legal responsibility for compliance with RID to the adviser?

  1. Yes, because the certificate holder is professionally liable for all infringements
  2. Only where the adviser is appointed on a full-time basis
  3. No, the undertaking remains responsible; the adviser supports and monitors compliance Correct answer.
  4. Yes, but only for international rail transport

Explanation

RID places the compliance obligations on the undertaking, and the safety adviser's role is to help ensure compliance, not to assume the undertaking's legal duties. The undertaking therefore remains answerable to the competent authority even when an external adviser is used. The adviser's monitoring and advice support, but do not replace, that responsibility.

Question 10Legal framework and regulatory obligations (RID, EU Directive 2008/68/EC, national implementing law, DGSA role and duties)

How are amendments to the RID rules brought into the EU legal order under Directive 2008/68/EC?

  1. By a unanimous vote of the Council of the European Union on each amendment
  2. Automatically, as soon as the RID annex enters into force under COTIF, without any EU act
  3. By a recommendation of the European Committee for Standardization
  4. By a Commission act amending the Directive's Annexes to reflect technical progress Correct answer.

Explanation

Article 8 of Directive 2008/68/EC empowers the Commission to adapt the Annexes to scientific and technical progress, so the EU applies an updated RID text by amending Annex II. The entry into force of a RID amendment under COTIF does not by itself amend the EU annex. CEN recommendations are technical and are not the legislative source.

Question 11Legal framework and regulatory obligations (RID, EU Directive 2008/68/EC, national implementing law, DGSA role and duties)

Which annex to Directive 2008/68/EC contains the RID rules applicable to the carriage of dangerous goods by rail?

  1. Annex II
  2. Annex I Correct answer.
  3. Annex III
  4. Annex IV

Explanation

Directive 2008/68/EC incorporates the modal dangerous goods rules through its annexes. Annex I is the rail annex and reproduces the RID provisions; Annex II is the road annex containing ADR, and Annex III is the inland waterways annex containing ADN. Annex IV does not contain the RID rules.

Question 12Legal framework and regulatory obligations (RID, EU Directive 2008/68/EC, national implementing law, DGSA role and duties)

In RID, which section contains the provisions on dangerous goods safety advisers, including appointment, certification and tasks?

  1. Section 5.4.1
  2. Section 1.9.5
  3. Section 1.8.3 Correct answer.
  4. Section 7.5.7

Explanation

RID Section 1.8.3 is the dedicated dangerous goods safety adviser section. It addresses the appointment of advisers, the vocational training certificate, the adviser's tasks and the annual report. The other cited sections deal with different subjects, such as tunnel restrictions, documentation and loading or unloading operations.

Question 13Legal framework and regulatory obligations (RID, EU Directive 2008/68/EC, national implementing law, DGSA role and duties)

A rail consignment of dangerous goods complies with Annex I to Directive 2008/68/EC and is moved from one Member State to another. What is the default position under the Directive?

  1. The receiving Member State may require prior authorisation from the European Commission.
  2. The receiving Member State may refuse it solely to protect its national rail operator.
  3. The receiving Member State may apply its own stricter dangerous goods rules without notification.
  4. The receiving Member State must allow it, subject only to permitted safety or security exceptions. Correct answer.

Explanation

Directive 2008/68/EC harmonises inland dangerous goods transport and prohibits Member States from restricting compliant movements except on specified grounds such as public safety or national security. Economic protection of a national operator is not a permitted ground. Stricter national requirements cannot simply be applied to otherwise compliant cross-border rail transport.

Question 14Legal framework and regulatory obligations (RID, EU Directive 2008/68/EC, national implementing law, DGSA role and duties)

A dangerous goods safety adviser for a rail loading terminal finds that staff are not applying the required segregation rules. What action is most consistent with the adviser's role under RID?

  1. Issue an administrative fine to each employee who loaded the goods incorrectly.
  2. Amend the RID segregation table so that the loads become compliant.
  3. Suspend all dangerous goods operations at the terminal until the competent authority approves a restart.
  4. Advise terminal management of the deficiency and record the recommendation in the safety report. Correct answer.

Explanation

The safety adviser monitors compliance and advises the undertaking on dangerous goods matters. The role does not include suspending operations, imposing fines or changing the RID rules. Findings and recommendations should be brought to management and reflected in the safety reporting process.

Question 15Legal framework and regulatory obligations (RID, EU Directive 2008/68/EC, national implementing law, DGSA role and duties)

After preparing the annual dangerous goods safety report, what does RID require the safety adviser to do with it?

  1. Submit it to the management of the undertaking. Correct answer.
  2. Send it directly to the European Commission for approval.
  3. File it only with the national rail infrastructure manager.
  4. Publish it on the undertaking's public website.

Explanation

Under RID 1.8.3.3, the safety adviser prepares an annual report on the undertaking's dangerous goods activities and submits it to management. The report is an internal management tool and must be kept by the undertaking for the required retention period. It is not sent to the Commission for approval or required to be published.

Question 16Legal framework and regulatory obligations (RID, EU Directive 2008/68/EC, national implementing law, DGSA role and duties)

A serious dangerous goods incident occurs during rail carriage. Which specific duty does RID place on the safety adviser in relation to that event?

  1. Represent the undertaking in court proceedings arising from the incident.
  2. Lead the criminal investigation and decide whether charges are brought.
  3. Investigate the incident and compile a report on it. Correct answer.
  4. Approve the repair of the damaged wagon before it returns to service.

Explanation

RID includes among the safety adviser's tasks the investigation of accidents or incidents involving dangerous goods and the compilation of reports on them. This supports the undertaking's internal learning and corrective action. Criminal investigation, prosecutorial decisions, wagon repair approval and legal representation fall outside the adviser's RID role.

Question 17Legal framework and regulatory obligations (RID, EU Directive 2008/68/EC, national implementing law, DGSA role and duties)

What must a holder of a DGSA vocational training certificate generally do to renew it for a further five years under RID?

  1. Apply to the European Commission for a new certificate.
  2. Complete a full initial training course again and repeat the original examination.
  3. Demonstrate five years of continuous employment as a safety adviser.
  4. Pass an examination during the final year of the certificate's validity. Correct answer.

Explanation

A RID safety adviser certificate is valid for five years. Renewal is linked to passing an examination during the last year of validity, rather than simply proving length of employment. The examination requirement refreshes the adviser's knowledge of current dangerous goods rules.

Question 18Legal framework and regulatory obligations (RID, EU Directive 2008/68/EC, national implementing law, DGSA role and duties)

In a Member State, which type of instrument normally gives the RID rules binding force for domestic rail dangerous goods operations?

  1. National legislation implementing Directive 2008/68/EC. Correct answer.
  2. A directly applicable regulation adopted by the rail industry association.
  3. A United Nations resolution adopted by the Security Council.
  4. A recommendation issued by the OTIF Secretariat.

Explanation

Directive 2008/68/EC requires Member States to bring into force the laws, regulations and administrative provisions needed to comply with its annexes. The RID rules in Annex I therefore become binding in the national legal order through implementing legislation. Recommendations, industry association regulations and Security Council resolutions do not perform that function.

Question 19Legal framework and regulatory obligations (RID, EU Directive 2008/68/EC, national implementing law, DGSA role and duties)

A DGSA certificate is issued by the competent authority of one Contracting State to RID. What recognition does the RID framework require from other Contracting States?

  1. They may refuse recognition whenever the holder is not a national of that State.
  2. They must reissue an equivalent certificate bearing their own national emblem.
  3. They may recognise it only after the holder passes a local language examination.
  4. They must recognise the certificate as valid within their territory. Correct answer.

Explanation

Under the RID safety adviser provisions, a certificate issued by the competent authority of one Contracting State is recognised by the competent authorities of the other Contracting States. This supports cross-border advice and avoids the need to obtain a separate certificate in every State. Recognition is not conditional on nationality or a local language examination.

Question 20Legal framework and regulatory obligations (RID, EU Directive 2008/68/EC, national implementing law, DGSA role and duties)

A Member State's national law allows rail consignors to rely on a DGSA certificate that expired six months earlier. How does this measure stand under the EU and RID framework?

  1. It is compatible because national law may extend certificate validity for domestic rail transport without EU approval.
  2. It is compatible because DGSA certificates are advisory documents with no fixed validity.
  3. It is incompatible only if the consignor also operates in another Member State.
  4. It is incompatible: RID requires a valid certificate, and national law cannot permit this non-compliance. Correct answer.

Explanation

Directive 2008/68/EC makes the RID rules in Annex I binding for rail dangerous goods transport, and RID sets a five-year validity period for the DGSA certificate. National law cannot authorise an undertaking to rely on an expired certificate for transport within the harmonised regime. The incompatibility exists for domestic rail transport as well as for cross-border movements.

Question 21Legal framework and regulatory obligations (RID, EU Directive 2008/68/EC, national implementing law, DGSA role and duties)

The RID rules that EU law applies to rail carriage are drawn from an international agreement administered by OTIF. Which agreement is that?

  1. The Convention concerning International Carriage by Rail (COTIF) Correct answer.
  2. The Convention on the Contract for the International Carriage of Goods by Road (CMR)
  3. The European Agreement concerning the International Carriage of Dangerous Goods by Road (ADR)
  4. The Convention on International Civil Aviation (Chicago Convention)

Explanation

RID is the Regulation concerning the International Carriage of Dangerous Goods by Rail, which forms Appendix C to the COTIF Convention and is administered by OTIF. Directive 2008/68/EC does not rewrite that text; it makes the RID rules reproduced in Annex I binding for rail transport within or between Member States.

Question 22Legal framework and regulatory obligations (RID, EU Directive 2008/68/EC, national implementing law, DGSA role and duties)

Directive 2008/68/EC applies to the rail transport of dangerous goods in which of the following situations?

  1. Only where the wagons used are registered in a Member State other than the State where loading takes place
  2. Only where the consignment crosses at least one intra-EU border during the journey
  3. Only where the goods are consigned by an undertaking established in a Member State other than the State of loading
  4. Both where the goods are carried between Member States and where they are carried wholly within one Member State Correct answer.

Explanation

Article 3 of Directive 2008/68/EC subjects rail transport of dangerous goods within or between Member States to the requirements of Annex I. Purely domestic carriage is therefore covered, so the same RID-based rules apply to internal and intra-EU rail operations.

Question 23Legal framework and regulatory obligations (RID, EU Directive 2008/68/EC, national implementing law, DGSA role and duties)

A terminal undertaking loads tank wagons for rail carriage. It appoints an adviser whose RID vocational training certificate covers road transport only, arguing that the dangerous goods are the same in both modes. How should this be assessed?

  1. It is not acceptable unless the adviser is also employed by a road haulier holding a transport licence.
  2. It is not acceptable, because the certificate must cover the mode of transport for which the adviser is appointed. Correct answer.
  3. It is acceptable, provided the adviser can show at least five years of practical experience in loading operations.
  4. It is acceptable, because an RID certificate covers the dangerous goods rules irrespective of the mode of carriage used.

Explanation

Under RID 1.8.3, the safety adviser's vocational training certificate is issued for one or more modes of transport. An undertaking loading for rail must therefore appoint an adviser whose certificate covers rail, regardless of the adviser's experience or the similarity of the goods to road consignments.

Question 24Legal framework and regulatory obligations (RID, EU Directive 2008/68/EC, national implementing law, DGSA role and duties)

A freelance expert holds a valid RID safety adviser certificate for rail and is appointed by three separate loading undertakings in the same Member State. Is that permissible?

  1. Yes; the certificate is personal to the holder and the same person may act for more than one undertaking. Correct answer.
  2. Yes, but only if all three undertakings operate at the same rail terminal and share a single loading plan.
  3. No; a safety adviser may be appointed by one undertaking only, because the appointment is exclusive.
  4. No; an external adviser may act for several undertakings only if the competent authority issues a multi-party authorisation.

Explanation

The RID safety adviser certificate is a personal qualification held by an individual, and RID does not limit its holder to a single undertaking. An external or freelance adviser may therefore be appointed by several undertakings, provided each of them can rely on the adviser for its own dangerous goods activities.

Question 25Legal framework and regulatory obligations (RID, EU Directive 2008/68/EC, national implementing law, DGSA role and duties)

A Member State decides to keep a national provision that deviates from RID for rail journeys entirely within its territory. Which procedural step does Directive 2008/68/EC require in addition to adopting the measure?

  1. Publishing the measure in the OTIF official bulletin instead of notifying it at EU level.
  2. Notifying the measure to the European Commission, which informs the other Member States. Correct answer.
  3. Obtaining a formal opinion from the RID Committee of Experts before the measure enters into force.
  4. Obtaining prior written consent from every Member State through which the goods might transit before the measure applies.

Explanation

Derogations from the annexes of Directive 2008/68/EC must be notified to the Commission, which passes them on to the other Member States and examines whether they are justified. The measure must in any case remain confined to the territory of the notifying Member State.

Question 26Legal framework and regulatory obligations (RID, EU Directive 2008/68/EC, national implementing law, DGSA role and duties)

A Member State's national law implementing Directive 2008/68/EC adds stricter requirements for rail loading within its territory. Which statement describes how these rules fit into the safety adviser's work?

  1. The adviser monitors the requirements applicable to the mode concerned, including the national provisions implementing the EU rules. Correct answer.
  2. The national rules must be disregarded, because the RID text prevails over national law in every case.
  3. The adviser's duties are limited to the Annex I text, so stricter national rules fall outside the adviser's remit.
  4. The stricter national rules are a matter for the competent authority only, so the adviser may record but not advise on them.

Explanation

The adviser's monitoring duty extends to the requirements governing the carriage of dangerous goods that apply to the undertaking's operations, which includes national provisions implementing Directive 2008/68/EC. An adviser who ignored stricter national loading rules would leave the undertaking's compliance work incomplete.

Question 27Legal framework and regulatory obligations (RID, EU Directive 2008/68/EC, national implementing law, DGSA role and duties)

A Member State has granted an undertaking a national derogation from the RID segregation requirements for a particular rail route. The undertaking now consigns the same dangerous goods along the same route, with the wagons crossing into another Member State. What governs that international carriage?

  1. The derogation applies provided the receiving Member State's competent authority is informed in writing before the wagons depart and raises no objection.
  2. The derogation applies up to the border, after which the receiving Member State's national law applies.
  3. Annex I to Directive 2008/68/EC applies, because the derogation is confined to national transport. Correct answer.
  4. The derogation continues to apply for the whole journey, because the route and the goods are unchanged.

Explanation

Derogations permitted by Directive 2008/68/EC are limited to transport on the territory of the authorising Member State. Once the wagons cross a border the requirements of Annex I apply again, and the national authorisation cannot be invoked for the international leg of the journey.

Question 28Legal framework and regulatory obligations (RID, EU Directive 2008/68/EC, national implementing law, DGSA role and duties)

A rail undertaking's only safety adviser resigns. Management states that the post will be filled after the peak season, three months later, and that loading will continue normally in the meantime. Which statement reflects the legal position under RID?

  1. The undertaking becomes non-compliant only if a dangerous goods incident occurs while the post is vacant.
  2. The undertaking is non-compliant while it carries out its activities without an appointed certified adviser. Correct answer.
  3. No breach occurs, because the appointment obligation is assessed once a year together with the annual safety report.
  4. No breach occurs, provided the former adviser's last annual report is still kept on file at the terminal.

Explanation

RID 1.8.3.1 requires an undertaking active in rail transport of dangerous goods to appoint at least one safety adviser; the duty is continuous while those activities are carried out. Operations performed during a vacancy therefore take place without the required adviser, whether or not an incident later occurs.

Question 29Classification of dangerous goods, class properties and hazard identification

Which RID class covers liquids that have a flash point of not more than 60 °C and are capable of sustaining combustion?

  1. Class 6.1
  2. Class 3 Correct answer.
  3. Class 4.1
  4. Class 2

Explanation

Class 3 is the RID class for flammable liquids. Its criteria include liquids with a flash point of not more than 60 °C, together with certain elevated-temperature substances. Class 2 covers gases and Class 4.1 covers flammable solids.

Question 30Classification of dangerous goods, class properties and hazard identification

In RID, which packing group is assigned to a substance presenting the highest degree of danger within its class?

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

Explanation

Packing group I is used for substances presenting high danger, packing group II for medium danger and packing group III for low danger within the same class. Packing group IV is not an RID packing group.

Question 31Classification of dangerous goods, class properties and hazard identification

Which RID class includes substances that, in contact with water, are liable to emit flammable gases?

  1. Class 4.3 Correct answer.
  2. Class 5.1
  3. Class 4.1
  4. Class 4.2

Explanation

Class 4.3 covers substances which, in contact with water, emit flammable gases. Class 4.1 covers flammable solids and Class 4.2 covers substances liable to spontaneous combustion; Class 5.1 covers oxidizing substances.

Question 32Classification of dangerous goods, class properties and hazard identification

Under RID, a consignment meets the classification criteria for more than one class and no specific entry applies. What determines the class to be used for carriage?

  1. The order of precedence set out in the RID precedence-of-hazard table Correct answer.
  2. The class chosen by the consignor and recorded on the transport document
  3. The class matching the largest quantity in the consignment
  4. The class with the highest UN number

Explanation

RID 2.1.3.10 contains a precedence-of-hazard table that determines which class prevails when a substance or article meets the criteria of more than one class and no specific entry applies. The choice is not left to the consignor, and UN number order or quantity does not decide the class.

Question 33Classification of dangerous goods, class properties and hazard identification

When a dangerous substance is assigned an RID “n.o.s.” entry, what must normally be added in brackets after the proper shipping name?

  1. The flash point determined by the closed-cup test
  2. The recognized chemical or biological name Correct answer.
  3. The trade name used on the product label
  4. The packing group shown in the dangerous goods list

Explanation

For entries containing “n.o.s.”, the proper shipping name must be supplemented by the recognized chemical or biological name of the substance in brackets. A trade name alone is not sufficient for identification under RID.

Question 34Classification of dangerous goods, class properties and hazard identification

Which property is characteristic of substances of RID Class 5.1?

  1. They may cause combustion by yielding oxygen Correct answer.
  2. They are corrosive to skin and may damage transport equipment
  3. They are toxic by inhalation and may harm the respiratory tract
  4. They are liable to spontaneous combustion when exposed to air

Explanation

Class 5.1 oxidizing substances may cause or contribute to the combustion of other material, generally by yielding oxygen. Spontaneous combustion is Class 4.2 and corrosive action is Class 8.

Question 35Classification of dangerous goods, class properties and hazard identification

A liquid causes full-thickness skin necrosis after 45 minutes of exposure in the RID corrosivity test. Which packing group does this indicate?

  1. Packing group III
  2. Packing group II Correct answer.
  3. No packing group, because Class 8 has no packing groups
  4. Packing group I

Explanation

For Class 8 corrosivity, packing group II applies when full-thickness skin necrosis occurs after more than 3 minutes but not more than 60 minutes of exposure. Packing group I covers damage within 3 minutes and packing group III covers damage after 60 up to 240 minutes.

Question 36Classification of dangerous goods, class properties and hazard identification

Which RID class covers self-reactive substances and mixtures that are thermally unstable and liable to undergo a strongly exothermic decomposition?

  1. Class 5.2
  2. Class 4.1 Correct answer.
  3. Class 4.3
  4. Class 4.2

Explanation

Self-reactive substances and mixtures are assigned to Class 4.1 because they are thermally unstable and may undergo strongly exothermic decomposition. Organic peroxides, which are also thermally unstable, are placed in Class 5.2 instead.

Question 37Classification of dangerous goods, class properties and hazard identification

A flammable liquid has a flash point of 23 °C and an initial boiling point of 40 °C. Which packing group does RID assign?

  1. No packing group is assigned because the flash point is 23 °C
  2. Packing group II
  3. Packing group III Correct answer.
  4. Packing group I

Explanation

For Class 3, packing group II requires a flash point below 23 °C together with an initial boiling point above 35 °C. A flash point of exactly 23 °C does not meet that criterion, so the liquid falls to packing group III, which covers flash points from 23 °C to 60 °C with an initial boiling point above 35 °C.

Question 38Classification of dangerous goods, class properties and hazard identification

A substance appears by name in the RID dangerous goods list under Class 4.3 and also has a subsidiary hazard of Class 6.1. What is its primary class for carriage?

  1. Class 4.3, as assigned by the named entry Correct answer.
  2. Class 6.1, because the more toxic hazard is always primary
  3. Class 6.1, because subsidiary hazards always take precedence
  4. Class 4.3, but only if the precedence table ranks it first

Explanation

When a substance is named in the RID dangerous goods list, the class shown for that entry is its primary hazard. A subsidiary hazard is carried in addition and does not replace the primary class; the precedence table is used only where no specific entry resolves the classification.

Question 39Classification of dangerous goods, class properties and hazard identification

Under RID, which Class 1 division is assigned to explosives that present a mass explosion hazard?

  1. Division 1.3
  2. Division 1.2
  3. Division 1.4
  4. Division 1.1 Correct answer.

Explanation

Division 1.1 covers substances and articles that have a mass explosion hazard, meaning the whole quantity can explode almost instantaneously. The other Class 1 divisions cover different explosion hazards, such as serious projection hazards, fire hazards with minor blast effects, or minor explosion hazards.

Question 40Classification of dangerous goods, class properties and hazard identification

A gas is acutely toxic by inhalation and meets no other Class 2 division criteria. Which RID division applies?

  1. Division 2.1
  2. Division 2.2
  3. Division 2.3 Correct answer.
  4. Division 4.3

Explanation

Division 2.3 covers gases that are toxic by inhalation. Division 2.1 is for flammable gases, Division 2.2 for non-flammable and non-toxic gases, and Division 4.3 for substances that emit flammable gases on contact with water.

Question 41Classification of dangerous goods, class properties and hazard identification

A solid assigned to RID Class 6.1 has an oral LD50 of 25 mg/kg. Which packing group applies?

  1. Packing group III
  2. Packing group II Correct answer.
  3. No packing group; Class 6.1 has no packing groups
  4. Packing group I

Explanation

For Class 6.1 oral toxicity, packing group II covers substances with an LD50 greater than 5 mg/kg but not more than 50 mg/kg. Packing group I applies at 5 mg/kg or less, while packing group III covers values above 50 mg/kg up to 300 mg/kg.

Question 42Classification of dangerous goods, class properties and hazard identification

Which property is characteristic of substances classified in RID Class 5.2?

  1. They spontaneously ignite when exposed to air at ordinary temperatures
  2. They are thermally unstable and liable to self-accelerating decomposition Correct answer.
  3. They cause severe skin necrosis after short contact with living tissue
  4. They evolve flammable gas when brought into contact with water

Explanation

Class 5.2 covers organic peroxides, which are thermally unstable and can undergo exothermic self-accelerating decomposition. Many organic peroxides also have additional hazards, but thermal instability is the defining Class 5.2 property.

Question 43Classification of dangerous goods, class properties and hazard identification

A liquid does not meet the skin-corrosion criteria but corrodes steel at a rate greater than 6.25 mm per year at 55 °C. Under RID, to which class is it assigned?

  1. Class 8 Correct answer.
  2. Class 9
  3. Class 5.1
  4. Class 4.3

Explanation

Class 8 includes substances that cause irreversible damage to skin or, where skin corrosion is not demonstrated, corrode steel or aluminium. The RID criterion for steel or aluminium corrosion is a rate greater than 6.25 mm per year at a test temperature of 55 °C.

Question 44Classification of dangerous goods, class properties and hazard identification

A liquid substance meets the RID criteria for environmentally hazardous substances and has no other hazard. Which UN number and class apply?

  1. UN 3077, Class 9
  2. UN 1993, Class 3
  3. UN 3264, Class 8
  4. UN 3082, Class 9 Correct answer.

Explanation

Environmentally hazardous substances that are liquids and not otherwise classified are assigned to Class 9, UN 3082. UN 3077 is the corresponding entry for environmentally hazardous substances that are solids.

Question 45Classification of dangerous goods, class properties and hazard identification

An infectious substance is known to cause disease in humans and meets the Category A criteria. Which UN number must appear in the transport document?

  1. UN 2900
  2. UN 3291
  3. UN 2814 Correct answer.
  4. UN 3373

Explanation

Category A infectious substances affecting humans are assigned to UN 2814. UN 2900 applies to Category A infectious substances affecting only animals, while UN 3373 is used for Category B biological substances.

Question 46Classification of dangerous goods, class properties and hazard identification

A package of radioactive material has a transport index of 5 and a maximum surface radiation level of 0.6 mSv/h. Which RID category label must be applied?

  1. Category I-WHITE
  2. Category III-YELLOW Correct answer.
  3. Category III-YELLOW, but only under exclusive use
  4. Category II-YELLOW

Explanation

Category III-YELLOW applies when the transport index is greater than 1 but not more than 10 and the maximum surface radiation level is greater than 0.5 mSv/h but not more than 2 mSv/h. A transport index of 5 alone would allow Category II-YELLOW, but the surface dose rate of 0.6 mSv/h exceeds the Category II limit of 0.5 mSv/h.

Question 47Classification of dangerous goods, class properties and hazard identification

A solid ignites spontaneously within five minutes of contact with air. Under RID, which classification and packing group apply?

  1. Class 4.1, Packing group I
  2. Class 4.2, Packing group III
  3. Class 4.2, Packing group I Correct answer.
  4. Class 4.3, Packing group I

Explanation

Pyrophoric solids are substances that ignite spontaneously in air within five minutes and are assigned to Class 4.2, Packing group I. Class 4.1 covers flammable solids that are readily combustible but not pyrophoric, while Class 4.3 covers water-reactive substances.

Question 48Classification of dangerous goods, class properties and hazard identification

Lithium ion batteries contained in equipment are carried under which RID entry?

  1. UN 3090
  2. UN 3480
  3. UN 3481 Correct answer.
  4. UN 3091

Explanation

UN 3481 covers lithium ion batteries contained in equipment or packed with equipment. UN 3480 is used for lithium ion batteries carried alone, and UN 3090 and UN 3091 are the corresponding lithium metal battery entries.

Question 49Classification of dangerous goods, class properties and hazard identification

A gas in RID is non-flammable, non-toxic and supports combustion better than air. Which Class 2 division applies?

  1. Division 2.4
  2. Division 2.3
  3. Division 2.2 Correct answer.
  4. Division 2.1

Explanation

RID assigns non-flammable, non-toxic gases to Division 2.2; a gas that supports combustion is additionally identified by subsidiary hazard Class 5.1. Division 2.1 covers flammable gases and Division 2.3 covers toxic gases.

Question 50Classification of dangerous goods, class properties and hazard identification

Which substance is assigned to RID Class 9 because of a health hazard arising during carriage?

  1. Sodium metal
  2. Trinitrotoluene
  3. Asbestos Correct answer.
  4. Anhydrous ammonia

Explanation

Asbestos is listed in Class 9 under UN 2590 because inhalation of its fibres can cause serious health effects during carriage. Sodium metal is Class 4.3, anhydrous ammonia is Class 2.3 and trinitrotoluene is Class 1.