In the event of a cargo fire, opening trailer doors may cause a fire to expand because: Do you currently have car insurance? Insurance is mandatory to drive in Ohio Yes I have insurance. But please show me your best quotes. No, please help me find the best insurance. Question In the event of a cargo fire, opening trailer doors may cause a fire to expand because: Answers Oxygen will be allowed into the area. The temperature of the trailer will change. It will provide moisture. It will provide more light. Explanation In the event of a cargo fire, you should not open the trailer doors. Doing this could cause the fire to flare up by giving it access to more oxygen. This questions appears in the following tests: Arkansas HazMat Maryland HazMat New Hampshire HazMat Oregon HazMat