A tank endorsement is: Question A tank endorsement is: Answers Only required when transporting gases. Only required when transporting liquids. Required when transporting both liquids and gases. Optional when transporting hazardous materials. Explanation With some exceptions, you must have a tank endorsement to transport liquids or gases. This applies to both hazardous and non-hazardous substances. This questions appears in the following tests: Illinois Class B Knowledge Test North Dakota Air Brakes North Dakota Air Brakes Tennessee Air Brakes West Virginia Air Brakes Wyoming Class B Knowledge Test
