Red Seal Sheet Metal Worker Practice Exam

What is the primary purpose of duct tape in HVAC systems?

1. To enhance aesthetic appeal

2. To waterproof electrical connections

3. To seal joints and connections

4. To create flexible ductwork

The correct answer is: To seal joints and connections

The primary purpose of duct tape in HVAC systems is to seal joints and connections. This sealing is critical for maintaining the efficiency of the system. When ducts have leaks or improper seals, conditioned air can escape, leading to significant energy loss and increased operational costs. By using duct tape, HVAC technicians can ensure that the connections between ducts, as well as any fittings, are tightly sealed to prevent air leakage. While other options may suggest uses for duct tape, they don’t encompass its main function in HVAC. Enhancing aesthetic appeal is not a function of duct tape, as its typical use prioritizes performance over looks. Waterproofing electrical connections is not the primary role of duct tape; specialized waterproofing materials tend to be more effective and suitable for those specific applications. The creation of flexible ductwork involves different materials and designs rather than relying solely on duct tape, which is more about sealing than structuring. Therefore, sealing joints and connections is indeed the essential use of duct tape within HVAC systems, emphasizing the importance of efficiency and air quality control.