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2026 Statistics
Key Facts: UK DGSA Core Exam
100 Qs
Practice Questions
SQA DGSA Core Syllabus
65%
Pass Mark
SQA DGSA Rules
5 Years
Certificate Validity
ADR 1.8.3.16
The UK DGSA Core exam validates knowledge of ADR carriage of dangerous goods rules, DGSA legal duties, classification, packaging, vehicle marking, and emergency procedures. This is an English-language MCQ study adaptation for the official assessment; it does not replace required practical, oral, written, or hands-on performance.
Sample UK DGSA Core Practice Questions
Try these sample questions to test your UK DGSA Core exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1Under the ADR classification framework, which primary hazard characteristics define Class 3 dangerous goods?
A.Substances liable to spontaneous combustion or thermal decomposition upon contact with air or moisture.
B.Gases that are asphyxiating, oxidizing, toxic, or flammable at standard atmospheric pressure.
C.Corrosive liquids and solids that cause full-thickness destruction of skin tissue within specified exposure periods.
D.Flammable liquids having a flash point of not more than 60 °C and gas oils, diesel, and light heating oils with a flash point up to 100 °C.
Explanation: Class 3 comprises flammable liquids with a flash point of not more than 60 °C, as well as gas oils, diesel fuels, and light heating oils with a flash point higher than 60 °C up to 100 °C, under ADR Chapter 2.2.3.
2What degree of danger is represented by Packing Group I in ADR dangerous goods transport?
A.Substances exempt from packaging regulations.
B.Substances presenting low danger.
C.Substances presenting high danger.
D.Substances presenting medium danger.
Explanation: Under ADR Section 2.1.1.3, Packing Group I designates substances presenting high danger, requiring the highest level of UN packaging performance testing.
3Which hazard class covers corrosive substances under the ADR regulations?
A.Class 6.1
B.Class 9
C.Class 4.1
D.Class 8
Explanation: Class 8 covers corrosive substances which by chemical action attack epithelial tissue or damage/destroy other goods and transport units, as specified in ADR Section 2.2.8.
4What standard format is used to represent UN Numbers for dangerous goods identification?
A.A three-digit code preceded by the letter 'D'.
B.A five-character alphanumeric code starting with 'HAZ'.
C.A four-digit number preceded by the letters 'UN'.
D.A six-digit sequence separated by hyphens.
Explanation: United Nations Numbers are four-digit Arabic numerals assigned to dangerous substances and articles, preceded by the letters 'UN' (e.g., UN 1203), under ADR Chapter 2.1.
5Under ADR Class 2, which physical state category covers gases dissolved in a liquid phase solvent under pressure?
A.Compressed gases
B.Refrigerated liquefied gases
C.Adsorbed gases
D.Dissolved gases
Explanation: Dissolved gases are defined in ADR 2.2.2.1.2 as gases dissolved in a liquid phase solvent under pressure (such as Acetylene dissolved in acetone).
6What is the primary operational distinction between ADR Class 5.1 and Class 5.2?
A.Class 5.1 covers self-reactive solids, whereas Class 5.2 covers infectious liquids.
B.Class 5.1 covers radioactive materials, whereas Class 5.2 covers corrosive wastes.
C.Class 5.1 includes flammable gases, whereas Class 5.2 includes toxic gases.
D.Class 5.1 comprises oxidizing substances, whereas Class 5.2 comprises organic peroxides.
Explanation: ADR Class 5.1 covers oxidizing substances which, while in themselves not necessarily combustible, may yield oxygen and cause/contribute to combustion. Class 5.2 covers thermally unstable organic peroxides liable to exothermic self-accelerating decomposition.
7Which hazard class is designated for toxic substances under the ADR regulation?
A.Class 4.3
B.Class 6.2
C.Class 6.1
D.Class 5.1
Explanation: Class 6.1 covers toxic substances known to be toxic to humans or presumed toxic based on animal experiments, as specified in ADR Section 2.2.61.
8What type of dangerous goods are classified under ADR Class 9?
A.Explosives and blasting agents.
B.Refrigerated liquefied asphyxiant gases.
C.Miscellaneous dangerous substances and articles, including environmentally hazardous substances.
D.Self-heating substances liable to spontaneous combustion.
Explanation: ADR Class 9 encompasses miscellaneous dangerous substances and articles presenting a danger during carriage that is not covered by other classes, including environmentally hazardous substances and lithium batteries.
9When a liquid mixture meets the criteria for both Class 3 Packing Group II and Class 8 Packing Group II under ADR 2.1.3.10, which hazard class takes precedence as the primary hazard?
A.Class 3
B.Class 6.1
C.Class 8
D.Class 9
Explanation: According to the ADR 2.1.3.10 precedence of hazard table, when Class 3 PG II meets Class 8 PG II, Class 3 takes precedence as the primary hazard, with Class 8 as the subsidiary hazard.
10What flash point and initial boiling point thresholds assign a Class 3 flammable liquid to Packing Group I?
A.Flash point between 23 °C and 60 °C with no boiling point limit.
B.Flash point above 60 °C with boiling point above 100 °C.
C.Initial boiling point less than or equal to 35 °C regardless of flash point.
D.Flash point below 23 °C and initial boiling point greater than 35 °C.
Explanation: Under ADR 2.2.3.1.3, Class 3 liquids with an initial boiling point of ≤ 35 °C are assigned to Packing Group I due to their high volatility and severe flammability risk.
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