Free CDGP examination Practice Questions

Sample Practice Questions

Try these 10 sample questions from the CDGP examination practice bank. Each includes the answer and explanation. Continue with the interactive practice above to review the full question set.

1. 1For an international dangerous goods shipment by air in 2026, which reference provides the detailed international air transport instructions that amplify ICAO Annex 18?

   1. A. The ICAO Technical Instructions for the Safe Transport of Dangerous Goods by Air
   2. B. The IMDG Code for maritime dangerous goods transport
   3. C. The ADR provisions for international road carriage
   4. D. The UN Model Regulations as a modal air operating code

   Answer: A

   Explanation: ICAO states, "The Technical Instructions amplify the basic provisions of Annex 18 and contain all the detailed instructions necessary for the safe international transport of dangerous goods by air." The shipment is by air, so the ICAO Technical Instructions are the detailed modal reference. The other documents address sea, road, or model provisions rather than serving as the detailed ICAO air instructions.

   Reference: ICAO Technical Instructions for the Safe Transport of Dangerous Goods by Air — Technical Instructions For The Safe Transport of Dangerous Goods by Air (Doc 9284)

2. 2A dangerous substance is specifically listed by name in the IMDG Dangerous Goods List. Where should its class, subsidiary hazards, and packing group, when applicable, be obtained for the basic description?

   1. A. From the specific Dangerous Goods List entry
   2. B. From the alphabetical index alone
   3. C. From the shipper's internal product catalogue
   4. D. From the class number most severe by numerical order

   Answer: A

   Explanation: The IMDG text states, "When an article or substance is specifically listed by name in the Dangerous Goods List in chapter 3.2, its class or division, its subsidiary hazard(s) and, when applicable, its packing group are taken from this list." The named entry controls the listed classification elements.

   Reference: IMO Resolution MSC.556(108): Amendments to the IMDG Code — IMDG Code amendment 42-24, 2.0.1.5

3. 3An IMDG package contains dangerous goods used as a coolant for other goods. What wording must follow the coolant's proper shipping name on the package mark?

   1. A. AS COOLANT
   2. B. SALVAGE
   3. C. CARGO AIRCRAFT ONLY
   4. D. EMPTY UNCLEANED

   Answer: A

   Explanation: IMDG 5.5.3.4.1 requires such packages to be marked with the proper shipping name "followed by the words “AS COOLANT” or “AS CONDITIONER” as appropriate." The question states use as a coolant, so AS COOLANT applies.

   Reference: IMO Resolution MSC.556(108): Amendments to the IMDG Code — IMDG Code amendment 42-24, 5.5.3.4.1

4. 4An IMDG chapter 6.1 packaging is intended to contain liquids and has passed its design-type test. What additional test must it pass before first use for transport?

   1. A. A suitable leakproofness test
   2. B. Only a repeat visual marking check
   3. C. Only the earlier design-type test
   4. D. A test deferred until after its first voyage

   Answer: A

   Explanation: IMDG 4.1.1.12 says, "Every packaging as specified in chapter 6.1 intended to contain liquids shall successfully undergo a suitable leakproofness test" and specifies that this occurs "before it is first used for transport;". This is a production-use requirement distinct from design-type testing.

   Reference: IMO Resolution MSC.556(108): Amendments to the IMDG Code — IMDG Code amendment 42-24, 4.1.1.12

5. 5A ship carrying dangerous goods has a fire. Which source should govern its initial response actions?

   1. A. The shipboard emergency plan
   2. B. The EmS Guide used in place of the ship's plan
   3. C. The MFAG used in place of the ship's plan
   4. D. The dangerous goods declaration used in place of the ship's plan

   Answer: A

   Explanation: IMO states, "initial actions should be carried out in accordance with the shipboard emergency plan." That plan governs the first response to a fire or spill.

   Reference: IMO Emergency Response Procedures for Ships Carrying Dangerous Goods (EmS) Guide — Purpose and shipboard contingency planning paragraphs

6. 6Under IMDG 1.4.3.2 guidance, which participants should adopt and implement a security plan for high consequence dangerous goods?

   1. A. Consignors and others engaged in their transport
   2. B. Only the ship and port facility under this section
   3. C. Only the consignee after transport is complete
   4. D. Only the competent authority, regardless of carriage role

   Answer: A

   Explanation: IMDG 1.4.3.2.2.1 says, "Consignors and others engaged in the transport of high consequence dangerous goods ... should adopt, implement and comply with a security plan". Chapter 1.4 is recommendatory except 1.4.1.1.

   Reference: IMO IMDG Code Amendment 42-24 — 1.4.0.1 and 1.4.3.2.2.1

7. 7A dangerous goods consignment is proposed for passenger aircraft. ICAO's air transport framework distinguishes it from carriage on cargo aircraft. Which conclusion follows if the entry is forbidden on passenger aircraft but permitted on cargo aircraft in normal circumstances?

   1. A. It may be consigned on either passenger or cargo aircraft in normal circumstances.
   2. B. It may be consigned on cargo aircraft, but not passenger aircraft, in normal circumstances.
   3. C. It is forbidden on both passenger and cargo aircraft in normal circumstances.
   4. D. It requires a State exemption for cargo aircraft in all circumstances.

   Answer: B

   Explanation: ICAO identifies goods "forbidden on passenger aircraft but permitted on cargo aircraft in normal circumstances" as a distinct category. The stated entry therefore cannot go on the proposed passenger flight in normal circumstances, while cargo aircraft carriage remains possible under the applicable requirements.

   Reference: ICAO Dangerous Goods — Dangerous Goods, Technical Instructions classification and aircraft categories

8. 8An article is not named in the IMDG Dangerous Goods List and meets the defining criteria of more than one hazard class. What determines its primary class and subsidiary hazards?

   1. A. The lowest numbered class is always primary.
   2. B. The highest numbered class is always primary.
   3. C. The precedence of hazard provisions in 2.0.3.
   4. D. The carrier may select any applicable class.

   Answer: C

   Explanation: IMO directs that unlisted goods meeting multiple class criteria are assigned "on the basis of the precedence of hazard provisions prescribed in 2.0.3." Numerical order and carrier preference do not replace that prescribed precedence.

   Reference: IMO Resolution MSC.556(108): Amendments to the IMDG Code — IMDG Code amendment 42-24, 2.0.1.6

9. 9An IMDG cargo transport unit contains dry ice used to cool cargo. Where must the coolant warning mark be placed so handlers can see it before entering?

   1. A. At each access point
   2. B. Only on the roof
   3. C. Only on the ship's manifest
   4. D. Only inside the unit

   Answer: A

   Explanation: IMDG 5.5.3.6.1 requires a warning mark "affixed at each access point in a location where it will be easily seen by persons opening or entering the cargo transport unit." This placement warns people before entry.

   Reference: IMO Resolution MSC.556(108): Amendments to the IMDG Code — IMDG Code amendment 42-24, 5.5.3.6.1

10. 10A manufacturer changes the material of an IMDG packaging in a way that alters its design. What does the Code require regarding design-type testing?

    1. A. Repeat the tests after the modification.
    2. B. Keep the earlier test result without review.
    3. C. Repeat only the package marking.
    4. D. Test only a different manufacturer's package.

    Answer: A

    Explanation: IMDG 6.1.5.1.4 says, "Tests shall also be repeated after each modification which alters the design, material or manner of construction of a packaging." The material change triggers retesting.

    Reference: IMO Resolution MSC.556(108): Amendments to the IMDG Code — IMDG Code amendment 42-24, 6.1.5.1.4