Engine 2014: Engineering Safety

1. A Because carbon dioxide dilutes the oxygen concentration in  the atmosphere and may cause asphyxiation.
2. B Because carbon dioxide breaks down in a fire into carbon monoxide which may cause blood poisoning in the person breathing this gas.
3. C Because carbon dioxide is a colorless and odorless gas that becomes highly toxic in the presence of high temperatures and will quickly incapacitate a person exposed to this gas.
4. D This action is unnecessary as carbon dioxide is not poisonous nor toxic but is a relatively harmless gas.

Tip: press A-D to answer