Which of the following is a requirement for a Qualified Electrical Worker?

A Qualified Electrical Worker is characterized by a specific skill set and knowledge base that ensures their competency in electrical work. Among these qualifications, understanding and being able to determine the work environment voltage are crucial. This requirement ensures that the worker can recognize the voltage levels present in a given task, which is vital for both safety and operational effectiveness. The ability to assess voltage helps in accurately identifying the risks associated with electrical work and allowing for the implementation of appropriate safety measures, such as using proper personal protective equipment, ensuring that tools are rated for the voltage, and applying safe work practices.

The other choices, while relevant to a Qualified Electrical Worker, do not specifically capture the critical knowledge related to voltage assessment. For instance, successfully completing an apprenticeship and being part of a safety training program contribute to a worker's qualifications but do not alone guarantee the vital skill of voltage determination, which is key to ensuring safety in potentially hazardous environments. Working under pressure is a valuable trait but does not directly correlate with the core competencies required to assess electrical hazards effectively. Therefore, proficiency in determining work environment voltage emerges as an essential requirement for a Qualified Electrical Worker.