LGV Dangerous Goods (ADR Basics) 3

Question 1

What colour is the background of the ADR warning placard for flammable liquids (Class 3)?

Accepted Answer

Red

Answer

Class 3 flammable liquid ADR placards have a red background with a flame symbol. Red is the internationally recognised colour for fire hazard in the ADR/GHS labelling system.

Question 2

What must a driver do with the Kemler plates when the dangerous goods vehicle is empty and unclean?

Accepted Answer

Keep the plates in place until the vehicle is cleaned and purged of residue — they must not be removed while residue remains

Answer

Kemler plates must remain in place until the tank or vehicle is cleaned and purged of dangerous residues. An empty but unclean tank still presents a hazard (fumes, residue) and must continue to display its ADR markings.

Question 3

What is 'IMDG' and how does it relate to ADR?

Accepted Answer

International Maritime Dangerous Goods code — similar to ADR but for sea transport, using the same UN classification system

Answer

IMDG (International Maritime Dangerous Goods) is the international code for transporting dangerous goods by sea. Like ADR for road and RID for rail, it uses the same UN numbering system, making cross-modal transport more consistent.

Question 4

At what quantity of explosive (Class 1) goods does a driver require a full ADR certificate?

Accepted Answer

Above the relevant threshold (which varies by Division and Compatibility Group) — below the threshold, limited exemptions apply

Answer

ADR specifies threshold quantities for each class, above which a full ADR certificate is required. For explosives, the thresholds are very low due to their extreme danger. Drivers must check the specific tables in ADR Chapter 1.1.3.6 for their substance.

Question 5

What are the fire extinguisher requirements for an ADR vehicle?

Accepted Answer

At least two fire extinguishers — one near the cab for engine fires, one larger unit for cargo area fires

Answer

ADR requires vehicles to carry fire extinguishers: typically a smaller one (2kg minimum) for cab/engine fires and a larger one (6kg minimum) for cargo area fires. The specific requirements depend on the maximum mass of the vehicle and substance.

UK LGV Theory Practice Test

UK LGV Theory Practice Test

LGV Dangerous Goods (ADR Basics) 3