200+ Free CDGP Practice Questions

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Under the UN Model Regulations, how many hazard classes are there for the classification of dangerous goods?

7 hazard classes

9 hazard classes

11 hazard classes

13 hazard classes

to track

2026 Statistics

Key Facts: CDGP Exam

100

Exam Questions

Open-book

3.5 hrs

Exam Duration

IHMM

$560

Total Initial Cost

$185 app + $375 exam

30%

49 CFR Weight

Largest domain

5 years

Experience Required

IHMM

$170/yr

Maintenance Fee

IHMM

The CDGP exam has 100 open-book multiple-choice questions in 3.5 hours. Key domains: US DOT Regulations/49 CFR (30%), International Air Transport/ICAO/IATA (25%), International Maritime/IMDG Code (25%), and UN Model Regulations (20%). Requires 5 years of relevant dangerous goods transportation experience. Four reference texts are allowed during the exam. Annual maintenance fee of $170. Recertification every 5 years.

Sample CDGP Practice Questions

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1Under the UN Model Regulations, how many hazard classes are there for the classification of dangerous goods?

A.7 hazard classes

B.9 hazard classes

C.11 hazard classes

D.13 hazard classes

Explanation: The UN Model Regulations establish 9 hazard classes for dangerous goods: Class 1 (Explosives), Class 2 (Gases), Class 3 (Flammable Liquids), Class 4 (Flammable Solids), Class 5 (Oxidizing Substances), Class 6 (Toxic Substances), Class 7 (Radioactive Material), Class 8 (Corrosives), and Class 9 (Miscellaneous Dangerous Goods). Some classes have divisions (e.g., Class 2 has Divisions 2.1, 2.2, and 2.3), but there are 9 primary hazard classes.

2What is the proper sequence for determining the classification of a dangerous good under the UN Model Regulations?

A.Assign UN number, determine hazard class, assign packing group, verify proper shipping name

B.Determine hazard class, assign UN number, assign packing group, verify proper shipping name

C.Determine hazard class, assign packing group, identify proper shipping name, assign UN number

D.Verify proper shipping name, determine hazard class, assign packing group, assign UN number

Explanation: The proper sequence is: (1) Determine the hazard class(es) based on the substance's properties, (2) Assign the packing group (I, II, or III) if applicable, (3) Identify the proper shipping name from the Dangerous Goods List, and (4) Assign the corresponding UN number. This sequence ensures the substance is properly categorized before documentation is prepared.

3In the UN Model Regulations, what does Packing Group I indicate?

A.Low danger substances requiring standard packaging

B.Medium danger substances requiring performance packaging

C.High danger substances requiring the highest performance packaging standards

D.Non-dangerous goods exempt from packaging requirements

Explanation: Packing Group I indicates high danger substances that require packaging meeting the most stringent performance standards. Packing Group II is for medium danger, and Packing Group III is for low danger. The packing group assignment determines the required packaging performance level, with Packing Group I requiring packaging capable of withstanding the highest test pressures and drop heights.

4According to the UN Model Regulations, which of the following is NOT a required element on a dangerous goods transport document?

A.The UN number preceded by "UN"

B.The proper shipping name

C.The shipper's account number

D.The hazard class or division number

Explanation: The shipper's account number is not a required element on a dangerous goods transport document under the UN Model Regulations. Required elements include: the UN number preceded by "UN", the proper shipping name (in upper case), the primary hazard class or division number (and subsidiary hazard classes when assigned), the packing group (if applicable), and the total quantity of dangerous goods.

5What is the purpose of Special Provision 340 in the UN Model Regulations?

A.To exempt certain quantities of dangerous goods from regulation

B.To provide packaging instructions for infectious substances

C.To allow dangerous goods in apparatus or machinery to be transported under specific conditions

D.To specify radioactive material transport requirements

Explanation: Special Provision 340 allows dangerous goods in apparatus or machinery to be transported under specific conditions, often with reduced documentation and packaging requirements. This provision recognizes that dangerous goods integrated into equipment (such as lithium batteries in laptops or fuel in engines) may pose reduced risks during transport when properly secured within the apparatus.

6Under the UN Model Regulations, what marking is required on packages containing dangerous goods of Packing Group I?

A.Only the UN number and proper shipping name

B.The UN number, proper shipping name, and the letter "X" in the packaging code

C.The UN number, proper shipping name, and a red diamond-shaped hazard label

D.Only the proper shipping name and hazard class label

Explanation: Packages containing Packing Group I substances require the most stringent markings: the UN number, proper shipping name, and the appropriate hazard class labels (which are diamond-shaped). Additionally, the packaging itself must be marked with the packaging specification code that includes "X" (indicating it meets Packing Group I performance standards), though this is a packaging manufacture marking rather than a consignment marking.

7What does the term "limited quantities" refer to in the UN Model Regulations?

A.Any amount of dangerous goods below the threshold requiring placarding

B.Specific maximum quantities per inner and outer packaging that qualify for reduced regulatory requirements

C.Dangerous goods transported for personal use only

D.Radioactive materials below the activity threshold

Explanation: Limited quantities refer to specific maximum quantities per inner and outer packaging (specified in column 7a of the Dangerous Goods List) that qualify for reduced regulatory requirements. When transported as limited quantities, dangerous goods may be exempt from certain marking, labeling, and documentation requirements, provided the packaging meets specific construction and testing standards and displays the limited quantity mark.

8When a substance meets the criteria for multiple hazard classes, how is the primary hazard class determined under the UN Model Regulations?

A.The hazard class with the lowest class number is always primary

B.The hazard class appearing first alphabetically is primary

C.The precedence of hazard table in the regulations determines the primary hazard

D.The shipper determines the primary hazard based on transportation mode

Explanation: When a substance meets criteria for multiple hazard classes, the precedence of hazard table in the UN Model Regulations (Table 2.1.3.1.3) determines the primary hazard class. This table establishes a hierarchy where certain hazards take precedence over others. For example, Class 3 (flammable liquids) takes precedence over Class 6.1 (toxic substances) in most cases. The subsidiary hazard(s) must also be indicated on the transport document and package.

9What is the purpose of the Dangerous Goods List (DGL) in the UN Model Regulations?

A.To list all banned dangerous goods prohibited from transport

B.To provide a reference of dangerous goods with their UN numbers, proper shipping names, and transport provisions

C.To provide emergency response information for each substance

D.To list only radioactive materials and their activity limits

Explanation: The Dangerous Goods List (DGL) is a comprehensive reference in the UN Model Regulations that lists dangerous goods with their assigned UN numbers, proper shipping names, hazard classes, packing groups, special provisions, and other transport provisions. It serves as the primary reference for properly classifying and documenting dangerous goods for transport. The list is organized by UN number in Chapter 3.2.

10Under the UN Model Regulations, what is required for the transport of excepted quantities of dangerous goods?

A.Full dangerous goods documentation and hazard labels

B.No markings or documentation of any kind

C.A specific excepted quantities marking and compliance with inner and outer packaging quantity limits

D.Placarding of the transport unit only

Explanation: For excepted quantities of dangerous goods, the UN Model Regulations require a specific excepted quantities marking on the package (a square with black hatching and "EQ" in the center) and compliance with strict inner and outer packaging quantity limits specified in column 7b of the Dangerous Goods List. The shipper must also prepare a document certifying compliance with excepted quantity requirements, though this is not the same as a full dangerous goods transport document.

About the CDGP Exam

The CDGP (Certified Dangerous Goods Professional) exam validates expertise in the transportation of dangerous goods across all modes — domestic (49 CFR), international air (ICAO/IATA), international maritime (IMDG Code), and UN Model Regulations. The exam is open-book, allowing candidates to use four specific reference texts.

Questions

100 scored questions

Time Limit

3.5 hours

Passing Score

Pass/fail (scaled passing score not publicly disclosed)

Exam Fee

$560 ($185 application + $375 exam) (Institute of Hazardous Materials Management (IHMM))

CDGP Exam Content Outline

30%

US DOT Regulations (49 CFR)

Domestic dangerous goods transportation regulations, hazard classification, packaging, marking, labeling, and documentation

25%

International Air Transport (ICAO/IATA)

ICAO Technical Instructions and IATA DGR for air transport of dangerous goods

25%

International Maritime (IMDG Code)

IMDG Code for ocean transport including packaging, stowage, and segregation requirements

20%

UN Model Regulations

UN Recommendations on Transport of Dangerous Goods, classification system, hazard communication, and multi-modal considerations

How to Pass the CDGP Exam

What You Need to Know

Passing score: Pass/fail (scaled passing score not publicly disclosed)
Exam length: 100 questions
Time limit: 3.5 hours
Exam fee: $560 ($185 application + $375 exam)

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

CDGP Study Tips from Top Performers

1Master 49 CFR regulations (30%) — hazard classification, packaging requirements, marking, labeling, and placarding

2Study ICAO Technical Instructions and IATA DGR — shipper declarations, packaging instructions, and quantity limitations

3Know IMDG Code requirements — dangerous goods list, container packing, stowage, and segregation for ocean transport

4Understand the UN classification system — 9 hazard classes and their divisions

5Practice navigating your reference texts quickly — the exam is open-book but time-limited

6Focus on cross-modal differences — know how regulations differ between ground, air, and sea transport

Frequently Asked Questions

What is the CDGP certification?

CDGP (Certified Dangerous Goods Professional) is an IHMM certification for professionals who manage the transportation of dangerous goods. It validates knowledge of 49 CFR (DOT), ICAO/IATA (air), IMDG Code (maritime), and UN Model Regulations.

Is the CDGP exam open-book?

Yes, the CDGP exam is open-book. You are allowed to use four specific reference texts: 49 CFR, ICAO Technical Instructions, IMDG Code, and UN Model Regulations. No writing materials or scrap paper are provided during the exam.

What are the prerequisites for the CDGP exam?

You need a minimum of 5 years of relevant experience in dangerous goods transportation. No specific education requirement exists, but you must submit an online application with work history detail and provide third-party employment verification.

How many questions are on the CDGP exam?

The CDGP exam has 100 open-book multiple-choice questions with a 3.5-hour (210-minute) time limit. The passing score is not publicly disclosed. Questions test application of regulations across domestic and international transport modes.

How much does the CDGP certification cost?

The initial cost is $560 ($185 non-refundable application fee + $375 exam fee). There is also an annual certification maintenance fee of $170. Recertification is required every 5 years via documentation or re-examination ($375).