2016 Mine Rescue Field Test No. 7
Taken from the 2016 National Mine Rescue Contest held in Reno, NV

Progress Indicator:
Question 1 of 30

1.  Direct ventilation is the common method of recovery in multi-level mines.  However, before using direct ventilation, there should be __________.

  1. A means to assure that gases can be carefully controlled.
  2. Sufficient time allotted to complete the process.
  3. Conclusive evidence that the fire has been extinguished.
  4. None of the above

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