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The percentage of time that a welder can operate without overheating is referred to as the

  1. Duty Cycle

  2. Heat Limit

  3. Performance Rate

  4. Welding Span

The correct answer is: Duty Cycle

The correct answer is A. Duty Cycle. Duty Cycle refers to the percentage of time during a specific period that a welder can operate without overheating. It is an important factor to consider when using welding equipment to ensure the welder's safety and prevent overheating of the machinery. The other options, such as Heat Limit, Performance Rate, and Welding Span, do not specifically refer to the percentage of time a welder can operate without overheating, making them incorrect choices in this context.