Practice question

What protection must be fitted to bottom discharge valves on tank vehicles carrying liquids under ADR 6.8.2.2.2?

  1. At least two or three mutually independent closures arranged in series
  2. A simple rubber stopper held with twine
  3. A plastic cable tie
  4. A single manual screw cap without internal stop-valve

Answer: A — At least two or three mutually independent closures arranged in series

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