California Wastewater Treatment Operator Practice Exam 2026 - Free Wastewater Treatment Operator Practice Questions and Study Guide

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What is the health effect of carbon dioxide?

could lead to asphyxiation

Carbon dioxide, when present in elevated concentrations, can displace oxygen in the air and lead to asphyxiation. This is particularly critical in enclosed or poorly ventilated spaces where oxygen levels may become dangerously low due to the accumulation of carbon dioxide. While carbon dioxide is a naturally occurring gas in the atmosphere, its increased levels can create hazardous conditions that affect breathing and overall respiratory function.

The other choices—skin irritation, allergic reactions, and coughing—are not typically associated with carbon dioxide exposure. Skin irritation and allergic reactions are more relevant to other substances, often involving chemical irritants or allergens. Coughing may occur as a result of respiratory irritation, but it is not a primary health effect linked to carbon dioxide unless in extreme high concentrations that affect breathing mechanics.

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causes skin irritation

triggers allergic reactions

induces coughing

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