Question Outage: Answers Is only a concern in warm weather. Is the same for each liquid. Should be a factor when determining how much liquid to load into a tank vehicle. Explanation Because liquids expand when their temperatures increase, some space must be left in a tank to accommodate the expansion. This space is referred to as "outage." The amount of required outage is different for different liquids. This questions appears in the following tests: Connecticut Tank Louisiana Tank Mississippi Tank Vermont Tank