What is one of the requirements for safe welding operations?

One of the key requirements for safe welding operations is testing for flammability. Welders work with materials that can produce sparks, heat, and molten slag, which can ignite nearby flammable materials and lead to fires or explosions. Conducting flammability tests helps to ensure that the surrounding environment is safe and that there are no combustible materials within the welding area. This proactive approach minimizes risks associated with welding operations.

The other options do not align with the essential safety measures required during welding. Using high temperatures at all times does not reflect a safety requirement; indeed, the goal is to use the appropriate heat needed for the specific task. Working only during daylight hours might not be practical for all operations, as many industrial environments operate 24/7, and adequate lighting should be ensured regardless of the time of day. Limiting the number of workers present is not a standard requirement for safe welding practices; instead, it is crucial to maintain proper ventilation and ensure that safety protocols are followed to protect all workers present.