š Key Concepts
ā¢ Definition of closed freight container in cargo handling and dangerous goods regulations
ā¢ Difference between rigid/permanent structures and fabric/tarpaulin closures
ā¢ What makes a unit effectively "closed" for containing cargo, weather, and vapors
š Think About
ā¢ Ask yourself: for a container to be considered truly closed, what must be true about all of its sides, roof, and ends?
ā¢ Which options clearly use rigid, permanent boundaries all the way around the cargo space, without relying on fabric or removable coverings?
ā¢ Which descriptions could allow vapors, weather, or cargo to escape more easily, and which one would best prevent that?
ā
Before You Answer
ā¢ Identify which options involve rigid, permanent structures on all sides and top versus those that use plastic/fabric or cables
ā¢ Check which options would be accepted as a "closed" unit under most dangerous goods/IMDG style definitions (think containment of leakage and weather protection)
ā¢ Eliminate any choice where the top or sides are fabric, plastic, or only secured by cables, since these are typically treated as open or soft-sided units, not fully closed ones