Your examiner asks: "Can the same substance be listed in both the IMDG Code and the IMSBC Code?"

A. Yes — IMDG covers a substance carried in packaged form, while IMSBC covers it when carried as a solid in bulk; the same substance can present different practical hazards (e.g. liquefaction risk for a bulk cargo that simply isn't relevant to small packaged quantities) and may carry entirely different entries, precautions and documentation requirements depending on which code applies to the actual mode of carriage.

B. No — a substance can only ever be listed under one of the two codes, never both.

C. IMSBC supersedes IMDG entirely for any substance that appears in both codes, regardless of how it is actually being carried.

D. The two codes are mutually exclusive by IMO Convention and listing a substance in both would be a drafting error.

A. Nine classes: 1 Explosives, 2 Gases (2.1 flammable, 2.2 non-flammable non-toxic, 2.3 toxic), 3 Flammable liquids, 4 Flammable solids/substances liable to spontaneous combustion/substances dangerous when wet, 5 Oxidising substances and organic peroxides, 6 Toxic and infectious substances, 7 Radioactive material, 8 Corrosives, 9 Miscellaneous dangerous substances and articles.

B. Eight classes, ending at Class 8 (Corrosives) — there is no Class 9.

C. Six classes, mirroring the IMSBC Code's Group A/B/C cargo classification.

D. The IMDG Code does not classify goods into numbered classes; classification is done solely by UN number with no class system.

A. The IMDG Code segregation table uses terms including "Away from," "Separated from," "Separated by a complete compartment or hold from," and "Separated longitudinally by an intervening complete compartment or hold from" — each representing an increasing physical/spatial separation requirement between incompatible classes, applied via the segregation table cross-referencing hazard classes against each other.

B. IMDG segregation has only one category: "stow apart," with no graduated levels of separation.

C. Segregation categories apply only to Class 1 (Explosives); other classes have no segregation requirement between each other.

D. Segregation terms describe segregation from crew accommodation only, not between different cargo classes.