Are all dangerous goods allowed on air transport?

• A. Yes, all are allowed on air transport.
• B. Only liquids are allowed.
• C. No; many are prohibited on air transport; some are allowed under Limited Quantities or Excepted Quantities if criteria are met.
• D. Only unknown.

Answer: (C)

Air transport of dangerous goods is tightly controlled because these items pose safety risks during flight. Not all dangerous goods can be shipped by air; many are prohibited outright. For those that can travel, strict criteria must be met, including proper packaging, labeling, documentation, and sometimes training requirements for the shipper.

When dangerous goods are allowed, they may be transported only under specific allowances such as Limited Quantities or Excepted Quantities, and only if the shipment meets all the defined conditions (like quantity limits and proper packaging and markings). This is why the correct answer says that many dangerous goods are prohibited, but some are permitted under these specific provisions. The other ideas—that all are allowed, or that only liquids are allowed, or that only unknown items are allowed—don’t reflect how air safety regulations actually govern dangerous goods.