Gas Heat ESCO Practice Exam

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Which connectors are used to secure sections of a rectangular sheet metal duct to the main supply line?

S connectors and drive clips
Flex connectors
Slip joints and cleats
Dampers and collars

The correct answer is: S connectors and drive clips

The correct answer involves understanding the role of connectors in securing sections of rectangular sheet metal duct systems. S connectors and drive clips are specifically designed to create a secure and stable connection between the duct sections and the main supply line. These connectors allow for a tight fit that minimizes air leakage, which is crucial for maintaining system efficiency. S connectors help align and interlock the duct sections, while drive clips offer additional support and stability, ensuring that the connections remain intact even under varying pressures and temperatures during operation. This combination is essential in installation practices to ensure the integrity and performance of the ductwork. In contrast, other options do not serve the same purpose. Flex connectors are used to accommodate movement or vibration but don't secure sections together. Slip joints and cleats play a role in joining sections but are not as commonly used in rectangular ducts. Dampers and collars are primarily used for airflow regulation and connection to other systems rather than securing ducts.