True or false: Pipeline markers contain information describing the transported commodity and the name and telephone number of the carrier.

• A. False
• B. Not always
• C. Only the commodity
• D. True

Answer: (D)

Pipeline markers provide essential safety information about a line. They tell you what material is carried and also give the operator’s name and a 24-hour emergency contact number. That combination lets responders quickly identify what could be in the pipe and who to call if there’s a leak, spill, or other incident.

So the statement is true: markers describe the transported commodity and include the name and telephone number of the carrier/operator. The other options don’t fit because markers consistently convey both pieces of information (not just the commodity, and not with a caveat like “not always”).