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100+ Free CDGP Practice Questions

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Under 49 CFR 173.302, what is the maximum allowable ullage (outage) when filling a compressed gas cylinder to ensure no liquid phase at 55°C (131°F)?

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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 100+ question experience with AI tutoring.

1Which UN body publishes the Model Regulations that serve as the foundational framework for all international dangerous goods transport regulations?
A.International Maritime Organization (IMO)
B.International Civil Aviation Organization (ICAO)
C.United Nations Committee of Experts on the Transport of Dangerous Goods (UN COE)
D.International Air Transport Association (IATA)
Explanation: The UN Committee of Experts on the Transport of Dangerous Goods (UN COE) publishes the UN Recommendations on the Transport of Dangerous Goods — Model Regulations. These recommendations form the harmonized foundation from which modal-specific regulations (IMDG, ICAO TI, ADR, RID) are derived, ensuring consistent classification, packaging, and communication standards across all transport modes.
2The ICAO Technical Instructions for the Safe Transport of Dangerous Goods by Air are legally binding for international air transport through which instrument?
A.The International Air Transport Association (IATA) Dangerous Goods Regulations
B.Annex 18 to the Convention on International Civil Aviation (Chicago Convention)
C.UN Recommendations on the Transport of Dangerous Goods, Model Regulations
D.The IMDG Code, Amendment 41-22
Explanation: The ICAO Technical Instructions derive their legal authority from Annex 18 (The Safe Transport of Dangerous Goods by Air) to the Chicago Convention. Annex 18 mandates that contracting states apply the detailed technical provisions contained in the ICAO Technical Instructions for all international air transport of dangerous goods. IATA DGR is derived from ICAO TI but is not itself the legally binding instrument.
3Under the IMDG Code, which edition is currently in force following the 2022 amendments?
A.IMDG Code, 39th Edition (Amendment 39-18)
B.IMDG Code, 40th Edition (Amendment 40-20)
C.IMDG Code, 41st Edition (Amendment 41-22)
D.IMDG Code, 42nd Edition (Amendment 42-24)
Explanation: The IMDG Code Amendment 41-22 (41st Edition) entered into force on 1 January 2023, with a transitional period allowing use of Amendment 40-20 until 31 December 2023. CDGP exam study materials reference the 41st Edition as the current standard for maritime dangerous goods transport. The IMDG Code is published by the International Maritime Organization (IMO).
4IATA Dangerous Goods Regulations (DGR) are generally more restrictive than the ICAO Technical Instructions. What is the primary reason a shipper must comply with IATA DGR when shipping via an IATA-member airline?
A.IATA DGR has been adopted as a treaty by the United Nations
B.Individual airlines may impose operator variations that are more restrictive than ICAO TI, and IATA DGR consolidates these
C.IATA DGR replaces the ICAO Technical Instructions entirely for commercial air shipments
D.IATA DGR only applies to passenger aircraft, not cargo-only operations
Explanation: IATA member airlines may impose operator variations that are more restrictive than the baseline ICAO Technical Instructions. IATA DGR consolidates ICAO TI plus the most restrictive operator variations into a single publication, making it the practical compliance standard for commercial air freight. Shippers using IATA member airlines must meet IATA DGR requirements, which may exceed ICAO TI minimums.
5Under 49 CFR 172.704, which of the following training categories is specific to employees of offerors required to have a security plan under 49 CFR 172.800?
A.General awareness/familiarization training
B.Function-specific training
C.Safety training
D.In-depth security training
Explanation: 49 CFR 172.704(a)(5) requires in-depth security training for hazmat employees of offerors that must have a security plan under Subpart I of Part 172 (172.800). This training must address the employer's security plan, specific security procedures, employee roles, and actions to take in a security breach or threat. Security awareness training (172.704(a)(4)) is required for all hazmat employees, but in-depth security training applies specifically to those covered by a security plan.
6The nine hazard classes in the UN/DOT dangerous goods system are further divided into divisions. Which class has the MOST divisions?
A.Class 2 (Gases)
B.Class 4 (Flammable Solids)
C.Class 1 (Explosives)
D.Class 5 (Oxidizing Substances and Organic Peroxides)
Explanation: Class 1 (Explosives) has the most divisions, with six: 1.1 (mass explosion hazard), 1.2 (projection hazard), 1.3 (fire hazard), 1.4 (no significant blast hazard), 1.5 (very insensitive blasting agents), and 1.6 (extremely insensitive detonating articles). By comparison, Class 2 has three divisions, Class 4 has three divisions, and Class 5 has two divisions.
7A dangerous good is assigned to a packing group based on the degree of hazard it presents. What does Packing Group I indicate?
A.Low danger
B.Medium danger
C.High danger
D.Not subject to packing group requirements
Explanation: Packing Group I (PG I) is assigned to materials presenting the greatest (high) danger and requires the most stringent packaging. Packing Group II indicates medium danger, and Packing Group III indicates low danger. Classes 1, 2, 5.2, 6.2, and 7 do not use packing groups. The packing group is used to select appropriate UN specification packaging.
8In the Hazardous Materials Table (49 CFR 172.101), Column 4 lists the hazard class or division. What information is found in Column 5?
A.The identification number (UN/NA number)
B.The packing group
C.Special provisions applicable to the material
D.The label codes required
Explanation: Column 5 of the Hazardous Materials Table (49 CFR 172.101) specifies the packing group (I, II, or III) assigned to the material. Column 2 is the proper shipping name, Column 3 is the hazard class or division, Column 4 is the identification number, Column 5 is the packing group, Column 6 is the label codes, and Column 7 is special provisions.
9When a material meets the criteria for more than one hazard class, the regulations require classification using hazard precedence. Which class generally takes the highest priority in the UN/DOT system?
A.Class 3 (Flammable Liquids)
B.Class 1 (Explosives)
C.Class 8 (Corrosives)
D.Class 6.1 (Toxic Substances)
Explanation: Class 1 (Explosives) takes highest priority in the hazard precedence table. The UN Model Regulations Table of Precedence of Hazard places Class 1 (explosives), Class 2 (gases with specific hazards), and radioactive materials at the top. When a material meets the criteria for Class 1, it must be classified as Class 1 regardless of any other hazard it may exhibit. 49 CFR 173.2a provides the DOT precedence table.
10Under the IATA DGR, a lithium ion battery shipped alone (UN 3480) on a passenger aircraft must not exceed what state of charge (SoC) per cell?
A.30% state of charge
B.50% state of charge
C.80% state of charge
D.100% state of charge is permitted
Explanation: IATA DGR Special Provision A382 (applicable to UN 3480 lithium ion batteries shipped alone) requires that cells and batteries shipped on passenger and cargo aircraft must be at no more than 30% of their rated capacity (state of charge). This provision was introduced to reduce fire risk from lithium batteries in the cargo hold of passenger aircraft. The restriction does not apply to batteries in equipment (UN 3481).

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

  • 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

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.