Question Before driving a tank, you should: Answers Check pipes, connections, and hoses for leaks. Make sure manhole covers do not have gaskets. Ensure all valves are open. Open the drain valves. Explanation When inspecting a tank vehicle, it is most important to check for leaks. Check all pipes, connections, and hoses, especially around joints. Make sure manhole covers have gaskets and that they close correctly. This questions appears in the following tests: Oregon Tank