Practice question

Why should a Pennsylvania tanker driver take highway curves and ramps well below posted speeds?

  1. Posted curve speeds are designed for tankers only
  2. Tankers can roll over at posted curve speeds because of high center of gravity and liquid movement
  3. Going below posted speeds is illegal for commercial vehicles
  4. A full tank eliminates all rollover risk

Answer: B — Tankers can roll over at posted curve speeds because of high center of gravity and liquid movement

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