Southwest Regional Drager BG4 Exam
Taken from the 2019 Southwest Regional Mine Rescue Contest held in Ruidoso, New Mexico


Progress Indicator:
Question 5 of 30

5.  Shaking of the ground, by elastic waves emanating from a blast, usually measured in inches per second of particle velocity.

Choices:
  1. Explosive Strength
  2. Ground Vibration
  3. Signs-Explosive (Placards)
  4. Hangfire


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