At concentrations above 150 ppmv, hydrogen sulfide can interfere with which sense?

Study for the Texas Wastewater D Test. Use flashcards and multiple choice questions, each with hints and explanations. Prepare thoroughly for your exam!

Multiple Choice

At concentrations above 150 ppmv, hydrogen sulfide can interfere with which sense?

Explanation:
Hydrogen sulfide at higher concentrations can blunt the sense of smell. It temporarily paralyzes the olfactory nerves, causing anosmia so you can’t smell the gas even though you’re still exposed. This makes odor-based detection unreliable at these levels, which is why the correct sense is smell. In practice, rely on instruments and detectors rather than odor to assess exposure risk, since other senses aren’t the primary ones affected by this gas at elevated concentrations.

Hydrogen sulfide at higher concentrations can blunt the sense of smell. It temporarily paralyzes the olfactory nerves, causing anosmia so you can’t smell the gas even though you’re still exposed. This makes odor-based detection unreliable at these levels, which is why the correct sense is smell. In practice, rely on instruments and detectors rather than odor to assess exposure risk, since other senses aren’t the primary ones affected by this gas at elevated concentrations.

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