Question: ion 28 (1 point) Listen The minimum ventilation time prior to entering a manhole is: O A) 120 seconds B) 1 minute C) 30 minutes

 ion 28 (1 point) Listen The minimum ventilation time prior to

ion 28 (1 point) Listen The minimum ventilation time prior to entering a manhole is: O A) 120 seconds B) 1 minute C) 30 minutes D) 5 minutes unction 2014 point)

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