Michigan Permit Test 23 Question Of the following, surge is strongest in: Answers Bulkhead tanks. Tanks with an open manhole. Unbaffled tanks. Explanation Smooth bore tanks, which lack internal bulkheads to limit the flow of liquid, are the most vulnerable to surge. Answer Statistics 15.99 % of our users get this question wrong. This questions is relatively Easy. Michigan Permit Test This questions appears in the following tests: Rhode Island Tank ,