Practice question

Package design awareness in the Packages module includes understanding that some packagings need ullage and pressure relief because:

  1. Ullage is only an aviation term never used in ADR
  2. Pressure relief is forbidden on all DG packages
  3. Temperature changes can raise internal pressure and risk rupture if completely liquid-full
  4. Full-to-brim filling is always safest for flammable liquids

Answer: C — Temperature changes can raise internal pressure and risk rupture if completely liquid-full

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