Red Seal Sheet Metal Worker Practice Exam

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Which of the following is NOT a common use of duct tape in HVAC systems?

  1. Sealing joints in ductwork

  2. Reinforcing structural components

  3. Insulating electrical cables

  4. Repairing small leaks

The correct answer is: Insulating electrical cables

In the context of HVAC systems, duct tape is primarily used for sealing joints in ductwork, reinforcing certain components, and repairing small leaks. However, it is not commonly used for insulating electrical cables. While duct tape may have some insulating properties, it is not designed nor rated for electrical insulation purposes. In HVAC applications, specialized electrical tape that meets safety standards is preferred for insulating electric cables to ensure proper safety and functionality. This is crucial as improper insulation can lead to safety hazards, such as shorts or electrical fires. Therefore, the role of duct tape does not extend to electrical insulation, making this the correct choice for the question asked.

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