Compared with a baffled tank, a smooth-bore tank usually has stronger forward-and-back liquid surge.
Correct answer: A – TRUE
Smooth-bore tanks have no internal baffles to slow liquid movement, so forward-and-back surge can be very strong. Baffles have openings that allow liquid to flow while helping control this surge. Side-to-side surge can still occur in baffled tanks, so baffles do not eliminate every liquid-movement hazard.
Source: Commercial Driver’s License Manual – 2005 CDL Testing System — § 8.2.4, “Baffled Tanks”, Commercial Driver’s License Manual – 2005 CDL Testing System — § 8.2.5, “Un-baffled Tanks”

