IATA Dangerous Goods Regulations (DGR) Exam – 150
Classification Practice Questions & Detailed Explanations
(2026 Update) | 9 Hazard Classes, Packing Groups, Lithium
Batteries & Multi-Hazard Scenarios
Q1–Q15: 9 Hazard Classes and basic classification
Q1
Dangerous goods are divided into how many primary hazard classes in the DGR?
A. 7
B. 8
C. 9*
D. 10
Explanation: The DGR organizes dangerous goods into 9 hazard classes based on
their primary risk (explosives, gases, flammable liquids, etc.).+1
Q2
Class 1 in the DGR covers:
A. Flammable liquids
B. Toxic substances
C. Explosives*
D. Corrosives
,Explanation: Class 1 is for explosives, subdivided into divisions 1.1–1.6 based on
type of explosion hazard.
Q3
Class 2 dangerous goods are:
A. Flammable liquids
B. Gases*
C. Flammable solids
D. Oxidizing substances
Explanation: Class 2 includes compressed, liquefied, dissolved, and refrigerated
liquefied gases (flammable, non-flammable, toxic).
Q4
Class 3 covers:
A. Flammable solids
B. Flammable liquids*
C. Oxidizers
D. Radioactive material
Explanation: Class 3 is defined as liquids with a flash point within specified ranges,
presenting a flammability hazard.
,Q5
Flammable solids belong primarily to which class?
A. Class 2
B. Class 3
C. Class 4*
D. Class 5
Explanation: Class 4 includes flammable solids, substances liable to spontaneous
combustion, and substances which emit flammable gases on contact with water.
Q6
Oxidizing substances and organic peroxides are classified under:
A. Class 3
B. Class 4
C. Class 5*
D. Class 7
Explanation: Class 5 is split into 5.1 (oxidizers) and 5.2 (organic peroxides).
Q7
Class 6 in the DGR covers:
A. Radioactive material
B. Toxic and infectious substances*
, C. Corrosives
D. Miscellaneous dangerous goods
Explanation: Class 6 has division 6.1 (toxic substances) and 6.2 (infectious
substances).
Q8
Radioactive material is classified as:
A. Class 3
B. Class 5
C. Class 7*
D. Class 9
Explanation: Class 7 is specifically for radioactive material, with its own unique
labelling and handling rules.
Q9
Corrosive substances belong to:
A. Class 1
B. Class 4
C. Class 8*
D. Class 9
Explanation: Class 8 includes substances that cause destruction of living tissue or
severe damage to metals.
Classification Practice Questions & Detailed Explanations
(2026 Update) | 9 Hazard Classes, Packing Groups, Lithium
Batteries & Multi-Hazard Scenarios
Q1–Q15: 9 Hazard Classes and basic classification
Q1
Dangerous goods are divided into how many primary hazard classes in the DGR?
A. 7
B. 8
C. 9*
D. 10
Explanation: The DGR organizes dangerous goods into 9 hazard classes based on
their primary risk (explosives, gases, flammable liquids, etc.).+1
Q2
Class 1 in the DGR covers:
A. Flammable liquids
B. Toxic substances
C. Explosives*
D. Corrosives
,Explanation: Class 1 is for explosives, subdivided into divisions 1.1–1.6 based on
type of explosion hazard.
Q3
Class 2 dangerous goods are:
A. Flammable liquids
B. Gases*
C. Flammable solids
D. Oxidizing substances
Explanation: Class 2 includes compressed, liquefied, dissolved, and refrigerated
liquefied gases (flammable, non-flammable, toxic).
Q4
Class 3 covers:
A. Flammable solids
B. Flammable liquids*
C. Oxidizers
D. Radioactive material
Explanation: Class 3 is defined as liquids with a flash point within specified ranges,
presenting a flammability hazard.
,Q5
Flammable solids belong primarily to which class?
A. Class 2
B. Class 3
C. Class 4*
D. Class 5
Explanation: Class 4 includes flammable solids, substances liable to spontaneous
combustion, and substances which emit flammable gases on contact with water.
Q6
Oxidizing substances and organic peroxides are classified under:
A. Class 3
B. Class 4
C. Class 5*
D. Class 7
Explanation: Class 5 is split into 5.1 (oxidizers) and 5.2 (organic peroxides).
Q7
Class 6 in the DGR covers:
A. Radioactive material
B. Toxic and infectious substances*
, C. Corrosives
D. Miscellaneous dangerous goods
Explanation: Class 6 has division 6.1 (toxic substances) and 6.2 (infectious
substances).
Q8
Radioactive material is classified as:
A. Class 3
B. Class 5
C. Class 7*
D. Class 9
Explanation: Class 7 is specifically for radioactive material, with its own unique
labelling and handling rules.
Q9
Corrosive substances belong to:
A. Class 1
B. Class 4
C. Class 8*
D. Class 9
Explanation: Class 8 includes substances that cause destruction of living tissue or
severe damage to metals.
