Liquid Surge & Braking Technique Practice Test, Test 1 of 2
Question 1 of 12
You are driving a tanker with a partially filled cargo tank and you come to a stop. What happens inside the tank, and how can it affect your truck?
✓
Correct!
Correct. The AAMVA CDL Manual states that liquid surge results from movement of liquid in partially filled tanks, and when coming to a stop the liquid surges back and forth; when the wave hits the end of the tank it tends to push the truck in the direction the wave is moving.
49 CFR 383.119(a) (knowledge of causes, prevention, and effects of cargo surge on motor vehicle handling)
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Not quite.
Wrong. Surge is defined specifically as liquid movement that continues after the vehicle begins to stop, not something that settles instantly, that is the whole reason it affects handling.
The correct answer is A: The liquid surges back and forth, and when the wave hits the end of the tank it tends to push the truck in the direction the wave is moving.
49 CFR 383.119(a) (knowledge of causes, prevention, and effects of cargo surge on motor vehicle handling)
✗
Not quite.
Wrong. The manual specifically describes surge affecting the truck's direction during stops (pushing it the way the wave moves), not just steering feel.
The correct answer is A: The liquid surges back and forth, and when the wave hits the end of the tank it tends to push the truck in the direction the wave is moving.
49 CFR 383.119(a) (knowledge of causes, prevention, and effects of cargo surge on motor vehicle handling)
✗
Not quite.
Wrong. Surge results from liquid movement in any partially filled tank; the manual does not limit the hazard to hazardous materials tanks, and a tank endorsement itself does not require the cargo to be hazardous.
The correct answer is A: The liquid surges back and forth, and when the wave hits the end of the tank it tends to push the truck in the direction the wave is moving.
49 CFR 383.119(a) (knowledge of causes, prevention, and effects of cargo surge on motor vehicle handling)