Inhalation hazards may be immediate or delayed. Which option is true?

• A. Always immediate
• B. Always years later
• C. Immediately or years later
• D. Never

Answer: (C)

Inhalation hazards from welding can affect you right away or show up long after exposure. Some fumes or gases cause immediate, acute effects such as irritation of the eyes, nose, and throat, coughing, or dizziness, and you might even get metal fume fever a few hours after exposure. Other hazards lead to delayed health problems that develop over years with continued exposure, like silicosis from silica dust or increased cancer risk from certain metals. Because both immediate and long-latency effects can occur, the true statement is that inhalation hazards may be immediate or years later. The other options are too absolute or incorrect because hazards are not exclusively immediate, exclusively years-later, or never harmful. To reduce risk, use proper ventilation, local exhaust, and appropriate respiratory protection.