Safety Trained Supervisor (STS) Practice Exam

How should the shade of a filter lens be determined for welding operations?

1. Use a standard shade for all operations

2. Match the shade to the type of welding and cutting operation

3. Always use the darkest filter available

4. Choose based on personal preference

The correct answer is: Match the shade to the type of welding and cutting operation

In welding operations, the appropriate shade of a filter lens is crucial for providing adequate eye protection against harmful radiation and intense visible light emitted during the welding process. The correct approach is to match the shade to the specific type of welding and cutting operation being performed. Different welding processes, such as gas welding, arc welding, and high-intensity cutting, emit varying levels of brightness and types of radiation. For instance, the intensity of light and heat produced in electric arc welding is significantly higher than that in gas welding, necessitating a darker lens shade to protect the welder’s eyes. By tailoring the shade to the specific operation, the welder can ensure sufficient protection without impairing visibility, which is essential for maintaining precision and safety throughout the task. Using a standard shade for all operations would not address the specific hazards presented by different techniques. Similarly, opting for the darkest available filter may lead to excessive darkness, reducing visibility and potentially making the welding process more dangerous. Lastly, choosing based on personal preference disregards the actual safety requirements dictated by the type of welding being done, which can vary widely. This makes matching the lens shade to the operation the most effective and safest method.