Question 53Safety & Environmental - Assistant Engineer

The correct answer is B) smaller than normal concentrations of H2S. Individuals who have consumed alcohol within 24 hours of exposure to H2S have a decreased tolerance to the toxic gas. Alcohol consumption can impair the body's ability to metabolize and eliminate H2S, making even smaller concentrations more dangerous. This is because alcohol disrupts the normal physiological processes that help the body cope with H2S exposure. The other options are incorrect because: A) individuals with recent alcohol consumption cannot tolerate unusually large H2S concentrations; C) they cannot withstand moderate H2S concentrations without the usual reactions; and D) they cannot be exposed to H2S for longer durations, as their tolerance is diminished.