Practice question

A relief valve on a pressurized tank that is operating (venting) during a fire is a warning sign because it may indicate:

  1. The container is safely cooling
  2. Rising internal pressure that, if it outpaces the valve, can lead to catastrophic failure or BLEVE
  3. The product has been removed
  4. The valve is simply defective and harmless

Answer: B — Rising internal pressure that, if it outpaces the valve, can lead to catastrophic failure or BLEVE

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