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200+ Free CDGP Practice Questions

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2026 Statistics

Key Facts: CDGP Exam

100

Total Exam Questions (Open-Book)

IHMM Candidate Handbook 2023

3.5 hours

Exam Duration

IHMM FAQ / Candidate Handbook

700/1000

Passing Score (Scaled)

IHMM Candidate Handbook 2023

$535

Total Exam Cost (App + Exam Fee)

IHMM Fee Schedule 2026

5 years

Minimum Experience Required (No Degree Needed)

IHMM CDGP Eligibility

5 years

Recertification Cycle (200 CMPs)

IHMM Recertification Policy

The IHMM CDGP exam is a 100-question open-book multiple-choice examination completed in 3.5 hours at a Kryterion HOST testing center. Four reference books are permitted: UN Model Regulations, ICAO Technical Instructions, IMDG Code, and IATA Dangerous Goods Regulations. Passing requires a scaled score of 700/1000. The only prerequisite is 5 years of relevant dangerous goods transportation experience — no degree required. Total cost is $535 ($175 application + $360 exam), plus a $160 annual maintenance fee. Recertification every 5 years requires 200 Certification Maintenance Points (CMPs). Transportation Security Specialists (BLS SOC 33-9099) and hazmat professionals in logistics earn median wages above $65,000 per year.

Sample CDGP Practice Questions

Try these sample questions to test your CDGP exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 200+ question experience with AI tutoring.

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 IHMM CDGP credential is ANSI-accredited (ANAB under ISO/IEC 17024) and validates multi-modal dangerous goods transportation expertise across the full international regulatory framework: UN Model Regulations, ICAO Technical Instructions, IATA Dangerous Goods Regulations, the IMDG Code, and awareness of ADR and TDG. The CDGP is the practitioner-level credential for professionals who classify, package, mark, label, document, and arrange the transport of dangerous goods by air, sea, road, and rail. It is distinct from the CDGT (trainer credential), which requires an active CDGP plus a CIT from BCSP.

Questions

100 scored questions

Time Limit

3.5 hours

Passing Score

700/1000 (scaled)

Exam Fee

$535 total ($175 application + $360 exam) (IHMM (Institute of Hazardous Materials Management))

CDGP Exam Content Outline

40%

International Regulatory Standards

UN Model Regulations, ICAO Technical Instructions, IMDG Code, IATA DGR, ADR/TDG awareness; training requirements (49 CFR 172.704); dangerous goods terminology, definitions, and hazard class/division identification

22%

Management of Transportation

Classification, proper shipping name selection (HMT/DGL lookup), packing groups, UN specification packaging (X/Y/Z codes), marking, labeling, placarding (Table 1/Table 2 thresholds), documentation requirements

14%

Handling of Cargo

Package markings on receipt, loading/unloading procedures, segregation and securement of dangerous goods, modal-specific handling (air acceptance, vessel stowage categories), inspection standards

9%

Emergency Management

Emergency planning concepts, ERG use, IMDG EmS codes, incident reporting (49 CFR 171.15 — NRC within 12 hours for fatalities), emergency response information requirements

8%

Management of Documentation

UN packaging testing and closure documentation, transport documents (Shipper's Declaration, IMDG DG Transport Document, NOTOC), competent authority approvals and special permits

7%

Security

Security plan requirements (49 CFR 172.800-172.820), in-depth security training for high-consequence materials, personnel and en-route security, security awareness

How to Pass the CDGP Exam

What You Need to Know

  • Passing score: 700/1000 (scaled)
  • Exam length: 100 questions
  • Time limit: 3.5 hours
  • Exam fee: $535 total ($175 application + $360 exam)

Keys to Passing

  • Work through all 200 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

CDGP Study Tips from Top Performers

1Practice tabbing and navigating your four reference books before the exam — open-book speed is the key differentiator; knowing where to find information faster than the time limit is the real skill
2Memorize the six CDGP blueprint domain weights: Regulatory Standards (40%), Transportation Mgmt (22%), Cargo Handling (14%), Emergency Mgmt (9%), Documentation (8%), Security (7%) — allocate study time proportionally
3Know UN packaging performance level codes: X = PG I/II/III, Y = PG II/III, Z = PG III only — these appear repeatedly in packaging marking questions
4Study lithium battery rules thoroughly: UN 3480 (bare batteries) vs UN 3481 (batteries in/with equipment), 30% SoC limit for UN 3480 PAX (SP A382), CAO 35 kg gross weight limit under PI 965
5Learn the four IMDG segregation levels in order: 'away from' → 'separated from' → 'separated by a complete compartment or hold from' → 'separated longitudinally by an intervening complete compartment or hold from'

Frequently Asked Questions

How many questions are on the CDGP exam?

The IHMM CDGP exam contains 100 multiple-choice questions with four answer options each. The exam may include a small number of unscored pretest items used to validate future exam forms; these do not affect the candidate's score.

Is the CDGP exam open-book?

Yes — the CDGP is one of the few professional certification exams that is fully open-book. Candidates may bring the four approved reference texts into the examination room: (1) UN Model Regulations, (2) ICAO Technical Instructions, (3) IMDG Code, and (4) IATA Dangerous Goods Regulations. Books may be tabbed and highlighted. No writing materials or scrap paper are permitted.

What score is required to pass the CDGP exam?

A scaled score of 700 out of 1000 is required to pass the CDGP. Scaled scores account for slight differences in difficulty across exam forms. Candidates who fail receive a diagnostic breakdown of their performance by domain area.

What are the eligibility requirements for the CDGP?

The only requirement is a minimum of five years of relevant experience in a field related to dangerous goods transportation. No specific degree is required — the CDGP is an experience-based credential. Third-party employment verification is required with the application.

How does the CDGP differ from the CDGT?

The CDGP (Certified Dangerous Goods Professional) is the practitioner credential for professionals who classify, package, mark, document, and arrange dangerous goods transport. The CDGT (Certified Dangerous Goods Trainer) requires an active CDGP in good standing PLUS a CIT (Certified Instructional Trainer) credential from BCSP, making it the training-professional-specific add-on to the CDGP.

How much does the CDGP exam cost?

The total cost is $535: a $175 nonrefundable application fee plus a $360 examination fee. After passing, an annual certification maintenance fee of $160 applies for the 5-year certification cycle. Rescheduling within 72 hours of the exam incurs a $100 rescheduling fee.

How do I maintain CDGP certification?

CDGP holders must recertify every 5 years by earning 200 Certification Maintenance Points (CMPs). CMPs may be earned through professional practice (100 CMPs automatic), continuing education, publications, teaching, and IHMM volunteer activities. Annual maintenance fees of $160 per year must also be kept current.

Where can I take the CDGP exam?

The CDGP is administered exclusively at Kryterion HOST computer-based testing centers. Because it is an open-book exam with physical reference books, it is not available as an online-proctored remote exam — candidates must appear in person at a testing center. Schedule at webassessor.com/ihmm after IHMM approves the application.