Liquid surge, weight distribution, and tanker vehicle handling concepts tested on the CDL tanker endorsement exam.
30 cards · basic cards · AI-written, checked twice. Edit anything.
- What is liquid surge?
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The movement of liquid within a tanker tank, caused by acceleration, deceleration, or turns- When does maximum surge occur in a tanker?
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When the liquid shifts suddenly during abrupt braking or acceleration- How does liquid surge affect a tanker during emergency braking?
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The liquid surges forward inside the tank, changing weight distribution and potentially causing a rollover- How does liquid surge affect vehicle stability during acceleration?
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The liquid surges backward, shifting the center of gravity and making the front lighter- What is the purpose of baffle plates in a tanker?
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To slow down the movement of liquid and reduce surge forces- What is the difference between a baffled tanker and a compartmented tanker?
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A baffled tanker has partial dividers that slow surge; a compartmented tanker has separate sealed sections- What is the main disadvantage of an unbaffled tanker?
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Liquid can surge freely from end to end, creating extreme weight shifts and handling instability- How does front-to-rear weight distribution affect tanker handling?
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Improper distribution causes steering problems, poor braking, or increased rollover risk- What is the safe loading practice for tanker weight distribution?
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Load should be distributed as evenly as possible across the tanker to maintain balanced weight- What is the center of gravity in a tanker vehicle?
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The point where the weight of the load is concentrated; in tankers it can shift with liquid movement- Why is a low center of gravity safer in a tanker?
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A lower center of gravity reduces the chance of rollover during turns and sudden maneuvers- What creates a high center of gravity in a tanker?
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Placing load too high in the tank, causing the weight to be concentrated above the axles- How should you navigate a curve with a tanker?
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Reduce speed before entering the curve, maintain steady speed through the curve, and avoid sudden maneuvers- Why does liquid surge create rollover risk when turning?
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Liquid shifts toward the outside of the turn, raising the center of gravity on that side and tipping the vehicle- What is a jackknife in a tanker?
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When the tractor and trailer fold together at an angle, usually caused by loss of traction during braking
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