What is the space left in a cargo tank so the liquid can expand as it warms called?
Correct answer: D – Outage
Outage is the unused space left in a cargo tank for thermal expansion. The Arkansas CDL manual warns against filling a cargo tank completely because liquids expand as they warm. Different liquids expand by different amounts, so the required outage varies with the product being transported.
Source: Arkansas Department of Public Safety, Commercial Driver License Manual — § 8.2.6, “Outage”

