Question Dry bulk tanks: Answers Usually have a low center of gravity. Usually have a high center of gravity. Are usually not allowed to cross railroad tracks. Explanation Driving with dry bulk tanks requires special care because they usually have high centers of gravity. It is also important for drivers to be prepared for the contents to shift in transit. Take a FREE Practice Test Now This questions appears in the following tests: Alaska Knowledge Test Class A , Ohio Knowledge Test Class A , Louisiana Passenger ,