Your Amazon purchases made using this link will benefit the United States Mine Rescue Association

Team Trainer Test I
Used at the North Central Regional, Wilmington, IL


Progress Indicator:
Question 1 of 30

1.  Hydrogen sulfide is:

Choices:
  1. Lighter than air.
  2. Heavier than oxygen.
  3. Less dense than air.
  4. Equal in density to oxygen.