A welder is using a portable fume extractor for a task. After a few weeks, they notice that the extractor's suction seems weaker, and there's more visible smoke in their breathing zone. What is the most likely reason for the reduced effectiveness of the fume extractor?

Question: A welder is using a portable fume extractor for a task. After a few weeks, they notice that the extractor's suction seems weaker, and there's more visible smoke in their breathing zone. What is the most likely reason for the reduced effectiveness of the fume extractor?

Answer options:

• The power cord is too long, causing voltage drop. ✅ The filter in the extractor is clogged with particulate matter.
• The fan motor is running in reverse direction.
• The ambient air temperature has increased significantly.

Correct answer: The filter in the extractor is clogged with particulate matter.

Explanation: Portable fume extractors rely on filters to remove particulate matter from welding fumes. Over time, these filters become clogged, which reduces airflow and suction, leading to decreased effectiveness and more fumes in the breathing zone. While a reversed motor would eliminate suction entirely, and power cord length or ambient temperature are less directly related to diminished suction, a clogged filter is the most common cause of reduced performance.