NHIE Mechanical Practice Exam

A temporary solution for sealing single wall vent connectors is clamping. This method involves using clamps to secure the connections tightly, which helps prevent any leaks of combustion gases. Clamping is particularly effective as it allows for easy adjustments and re-sealing if necessary, making it a convenient option when time and resources are limited.

Welding, while providing a more permanent seal, is not suitable for temporary solutions due to the time and skill required to perform the task properly, as well as the risks associated with welding near combustible materials. Venting does not address the sealing issue directly, while using insulation is mainly for thermal protection rather than sealing purpose. Thus, clamping stands out as the most effective and practical temporary solution for ensuring the safety and efficiency of vent connectors.