Wastewater Treatment Operator Certification Practice Test

What could happen if you are exposed to very high concentration of hydrogen sulfide?

1. Swelling of the hand

2. Numbness of the legs

3. It could quickly lead to death

4. Develop skin rash

The correct answer is: It could quickly lead to death

Exposure to very high concentrations of hydrogen sulfide can lead to severe health risks, including rapid respiratory paralysis and potentially life-threatening situations. Hydrogen sulfide acts as a potent neurotoxin, and inhaling it at elevated levels can interfere with the body's ability to utilize oxygen, leading to immediate and serious health consequences. Concentrations above 100 parts per million (ppm) can result in loss of consciousness, and exposure above 700 ppm can lead to death within minutes due to respiratory failure. The rapidity of these effects highlights the critical danger associated with high levels of hydrogen sulfide, making it essential for wastewater treatment operators to recognize the risks and take appropriate safety precautions.