IATA Training Exam 2026–2027 | Aviation
Safety & Dangerous Goods Certification
Practice Questions, Verified Answers &
Detailed Explanations | Complete Study
Guide PDF
• This study guide contains 200 exam-style practice questions with verified
answers and detailed EXPERT RATIONALE, designed to simulate the actual
IATA Dangerous Goods Regulations (DGR) certification exam experience.
• Use this material by reading each question independently, selecting your
answer before checking the highlighted correct option, then studying the
EXPERT RATIONALE to reinforce your understanding of the regulation.
IATA TRAINING EXAM 2026–2027
Aviation Safety & Dangerous Goods Certification
200 Practice Questions | Complete Study Guide
Q1. What is the primary regulatory document used globally for the transport
of dangerous goods by air?
A. ICAO Technical Instructions for the Safe Transport of Dangerous Goods by Air
B. IMDG Code
C. ADR European Agreement
D. US DOT Hazardous Materials Regulations
E. IMO Dangerous Goods Manual
✔ Correct Answer: A. ICAO Technical Instructions for the Safe Transport of
Dangerous Goods by Air
EXPERT RATIONALE: The ICAO Technical Instructions form the legally binding
international standard for transporting dangerous goods by air. The IATA DGR is
,derived from and must comply with the ICAO Technical Instructions, making them
the primary global regulatory reference for air transport.
Q2. The IATA Dangerous Goods Regulations (DGR) are updated how
frequently?
A. Every five years
B. Every three years
C. Every two years
D. Annually
E. Every six months
✔ Correct Answer: D. Annually
EXPERT RATIONALE: The IATA DGR is updated and published annually to reflect
changes in ICAO Technical Instructions, operator variations, state variations, and
new dangerous goods classifications, ensuring the most current safety standards
are applied.
Q3. Which of the following best defines "dangerous goods" in aviation?
A. Any article that is heavier than 5 kg
B. Articles or substances capable of posing a significant risk to health, safety,
property, or the environment when transported by air
C. Any liquid substance transported in bulk
D. Goods that require special handling due to their size
E. Any article manufactured from chemical compounds
✔ Correct Answer: B. Articles or substances capable of posing a significant risk
to health, safety, property, or the environment when transported by air
,EXPERT RATIONALE: This is the definition as provided in the IATA DGR. Dangerous
goods are specifically defined by their potential to cause significant risk to health,
safety, property, or the environment, not merely by size, weight, or chemical
composition alone.
Q4. How many classes of dangerous goods are recognized under the IATA DGR
classification system?
A. 7
B. 8
C. 9
D. 10
E. 11
✔ Correct Answer: C. 9
EXPERT RATIONALE: The IATA DGR recognizes 9 classes of dangerous goods: Class
1 (Explosives), Class 2 (Gases), Class 3 (Flammable Liquids), Class 4 (Flammable
Solids), Class 5 (Oxidizing Substances and Organic Peroxides), Class 6 (Toxic and
Infectious Substances), Class 7 (Radioactive Material), Class 8 (Corrosives), and Class
9 (Miscellaneous Dangerous Goods).
Q5. Class 1 dangerous goods are categorized as which of the following?
A. Gases
B. Flammable liquids
C. Explosives
D. Oxidizing substances
E. Corrosives
✔ Correct Answer: C. Explosives
, EXPERT RATIONALE: Class 1 in the UN classification system covers all explosive
substances and articles. This class is further divided into six divisions (1.1 through
1.6) based on the type of explosive hazard they present.
Q6. Which division of Class 1 covers articles which have a mass explosion
hazard?
A. Division 1.2
B. Division 1.3
C. Division 1.4
D. Division 1.1
E. Division 1.5
✔ Correct Answer: D. Division 1.1
EXPERT RATIONALE: Division 1.1 covers substances and articles that have a mass
explosion hazard — meaning the entire load can explode virtually instantaneously.
This is considered the most dangerous division within Class 1.
Q7. Division 1.4 explosives are characterized by which of the following?
A. Mass explosion hazard
B. Projection hazard but no mass explosion hazard
C. Fire hazard with minor blast or projection hazard
D. No significant hazard — effects confined to the package
E. Extremely insensitive substances with mass explosion hazard
✔ Correct Answer: D. No significant hazard — effects confined to the package
EXPERT RATIONALE: Division 1.4 substances present no significant hazard beyond
the package. Any effects are largely confined to the package and no projection of
Safety & Dangerous Goods Certification
Practice Questions, Verified Answers &
Detailed Explanations | Complete Study
Guide PDF
• This study guide contains 200 exam-style practice questions with verified
answers and detailed EXPERT RATIONALE, designed to simulate the actual
IATA Dangerous Goods Regulations (DGR) certification exam experience.
• Use this material by reading each question independently, selecting your
answer before checking the highlighted correct option, then studying the
EXPERT RATIONALE to reinforce your understanding of the regulation.
IATA TRAINING EXAM 2026–2027
Aviation Safety & Dangerous Goods Certification
200 Practice Questions | Complete Study Guide
Q1. What is the primary regulatory document used globally for the transport
of dangerous goods by air?
A. ICAO Technical Instructions for the Safe Transport of Dangerous Goods by Air
B. IMDG Code
C. ADR European Agreement
D. US DOT Hazardous Materials Regulations
E. IMO Dangerous Goods Manual
✔ Correct Answer: A. ICAO Technical Instructions for the Safe Transport of
Dangerous Goods by Air
EXPERT RATIONALE: The ICAO Technical Instructions form the legally binding
international standard for transporting dangerous goods by air. The IATA DGR is
,derived from and must comply with the ICAO Technical Instructions, making them
the primary global regulatory reference for air transport.
Q2. The IATA Dangerous Goods Regulations (DGR) are updated how
frequently?
A. Every five years
B. Every three years
C. Every two years
D. Annually
E. Every six months
✔ Correct Answer: D. Annually
EXPERT RATIONALE: The IATA DGR is updated and published annually to reflect
changes in ICAO Technical Instructions, operator variations, state variations, and
new dangerous goods classifications, ensuring the most current safety standards
are applied.
Q3. Which of the following best defines "dangerous goods" in aviation?
A. Any article that is heavier than 5 kg
B. Articles or substances capable of posing a significant risk to health, safety,
property, or the environment when transported by air
C. Any liquid substance transported in bulk
D. Goods that require special handling due to their size
E. Any article manufactured from chemical compounds
✔ Correct Answer: B. Articles or substances capable of posing a significant risk
to health, safety, property, or the environment when transported by air
,EXPERT RATIONALE: This is the definition as provided in the IATA DGR. Dangerous
goods are specifically defined by their potential to cause significant risk to health,
safety, property, or the environment, not merely by size, weight, or chemical
composition alone.
Q4. How many classes of dangerous goods are recognized under the IATA DGR
classification system?
A. 7
B. 8
C. 9
D. 10
E. 11
✔ Correct Answer: C. 9
EXPERT RATIONALE: The IATA DGR recognizes 9 classes of dangerous goods: Class
1 (Explosives), Class 2 (Gases), Class 3 (Flammable Liquids), Class 4 (Flammable
Solids), Class 5 (Oxidizing Substances and Organic Peroxides), Class 6 (Toxic and
Infectious Substances), Class 7 (Radioactive Material), Class 8 (Corrosives), and Class
9 (Miscellaneous Dangerous Goods).
Q5. Class 1 dangerous goods are categorized as which of the following?
A. Gases
B. Flammable liquids
C. Explosives
D. Oxidizing substances
E. Corrosives
✔ Correct Answer: C. Explosives
, EXPERT RATIONALE: Class 1 in the UN classification system covers all explosive
substances and articles. This class is further divided into six divisions (1.1 through
1.6) based on the type of explosive hazard they present.
Q6. Which division of Class 1 covers articles which have a mass explosion
hazard?
A. Division 1.2
B. Division 1.3
C. Division 1.4
D. Division 1.1
E. Division 1.5
✔ Correct Answer: D. Division 1.1
EXPERT RATIONALE: Division 1.1 covers substances and articles that have a mass
explosion hazard — meaning the entire load can explode virtually instantaneously.
This is considered the most dangerous division within Class 1.
Q7. Division 1.4 explosives are characterized by which of the following?
A. Mass explosion hazard
B. Projection hazard but no mass explosion hazard
C. Fire hazard with minor blast or projection hazard
D. No significant hazard — effects confined to the package
E. Extremely insensitive substances with mass explosion hazard
✔ Correct Answer: D. No significant hazard — effects confined to the package
EXPERT RATIONALE: Division 1.4 substances present no significant hazard beyond
the package. Any effects are largely confined to the package and no projection of
