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Free DGSA Practice Questions

10 free, exam-style Dangerous Goods Safety Adviser (DGSA) practice questions with answers and explanations. No signup required. Work through them below, then take the full free DGSA practice test to study every exam domain.

Question 1

Following a road traffic accident in which a tank vehicle leaks and contaminates a nearby watercourse, what is the dangerous goods safety adviser specifically required to produce under ADR?

  1. An accident report to the management of the undertaking
  2. An entry in the next routine annual report to management
  3. A revised written instruction for the driver to carry in the cab
  4. A notification to the vehicle's insurer within 30 days
Show answer & explanation

Correct answer: A - An accident report to the management of the undertaking

Question 2

A single liquid substance meets the classification criteria for both Class 3 (flammable liquid) and Class 6.1 (toxic). How is its primary hazard determined?

  1. Class 6.1 always takes priority because toxicity is a health hazard
  2. Class 3 always takes priority because flammability is an immediate hazard
  3. By applying the table of precedence of hazards
  4. The consignor selects whichever class is more convenient to label
Show answer & explanation

Correct answer: C - By applying the table of precedence of hazards

Question 3

A transport unit is loaded with 300 litres of a Transport Category 2 liquid and 250 litres of a Transport Category 3 liquid, all in packages. Applying the ADR 1.1.3.6 calculation, does the load qualify for the small-load relaxations?

  1. Yes - the combined volume of 550 litres is below the 1,000 litre limit
  2. No - the calculated total is 1,150, which exceeds the threshold of 1,000
  3. Yes - the calculated total is 1,150, which is within the threshold
  4. No - any load containing two different transport categories is fully regulated
Show answer & explanation

Correct answer: B - No - the calculated total is 1,150, which exceeds the threshold of 1,000

Question 4

On a transport document, in what order must the core elements of the dangerous goods description appear?

  1. Proper shipping name, UN number, packing group, class label(s)
  2. Class label(s), UN number, proper shipping name, packing group
  3. UN number, class label(s), packing group, proper shipping name
  4. UN number, proper shipping name, class label(s), packing group
Show answer & explanation

Correct answer: D - UN number, proper shipping name, class label(s), packing group

Question 5

A petrol road tanker is operating only on domestic journeys within Great Britain. What is displayed in the upper portion of the orange-coloured plate?

  1. The Emergency Action Code (EAC)
  2. The Hazard Identification Number (Kemler code)
  3. The proper shipping name in full
  4. The tunnel restriction code for the load
Show answer & explanation

Correct answer: A - The Emergency Action Code (EAC)

Question 6

A flammable liquid has a flashpoint of 21 °C and an initial boiling point of 70 °C. Which packing group applies?

  1. Packing Group I, because the flashpoint is below 23 °C
  2. Packing Group II
  3. Packing Group III, because the boiling point is above 35 °C
  4. No packing group is assigned to Class 3 substances
Show answer & explanation

Correct answer: B - Packing Group II

Question 7

A transport unit with a maximum permissible mass exceeding 7.5 tonnes is carrying packaged dangerous goods above the small-load threshold. What is the minimum fire-extinguishing provision required?

  1. A single extinguisher of at least 6 kg dry powder
  2. A total capacity of at least 8 kg, with at least one extinguisher of at least 2 kg
  3. A total capacity of at least 12 kg, with at least one extinguisher of at least 6 kg
  4. Two extinguishers of 2 kg each for the engine and cab
Show answer & explanation

Correct answer: C - A total capacity of at least 12 kg, with at least one extinguisher of at least 6 kg

Question 8

A single transport unit carries packages with two different tunnel restriction codes: one assigned (C/E) and another assigned (D/E). Which restriction governs the routing of the whole transport unit?

  1. The most restrictive code, (C/E), applies to the whole load
  2. The least restrictive code, (D/E), because it permits the most tunnels
  3. Each package is assessed separately and may take different routes
  4. Neither - tunnel codes only apply to substances carried in tanks
Show answer & explanation

Correct answer: A - The most restrictive code, (C/E), applies to the whole load

Question 9

Lithium-ion batteries (for example, the rechargeable cells used in power tools) are offered for carriage by road, packed on their own. Which UN number applies?

  1. UN 3090, because lithium batteries are a Class 9 hazard
  2. UN 3091, as the batteries are contained in equipment
  3. UN 3480
  4. UN 3171, the entry for battery-powered equipment
Show answer & explanation

Correct answer: C - UN 3480

Question 10

An operator carries a single liquid in a road tanker and calculates that the quantity would fall below 1,000 points. Can the small-load exemption in ADR 1.1.3.6 be applied to avoid orange-plate marking?

  1. Yes - the points calculation determines the outcome regardless of how the goods are carried
  2. Yes - provided the driver also holds a basic ADR training certificate
  3. No - but it would apply if the same volume were carried in a single IBC
  4. No - the small-load exemption does not apply to carriage in tanks
Show answer & explanation

Correct answer: D - No - the small-load exemption does not apply to carriage in tanks

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