NATE Air Conditioning and Heat Pumps Practice Exam

Which factor affects the decision to use a running trap on a condensate line at the evaporator coil?

1. Running traps are better at draining condensate water than P-traps

2. Running traps are easier to clean than other types of condensate traps

3. Running traps do not allow for the proper drainage of condensate water

4. Running traps prevent air from being drawn into the air handler in a draw-through application

The correct answer is: Running traps do not allow for the proper drainage of condensate water

The decision to use a running trap on a condensate line at the evaporator coil is influenced by the function of running traps in maintaining proper condensate drainage and air circulation. Running traps are specifically designed to effectively manage condensate accumulation while preventing air from entering the system during operation. Running traps allow for continuous drainage of condensate, which is essential in maintaining efficient system performance. They prevent the buildup of water that could lead to operational issues, such as reduced heat exchange efficiency or even equipment damage due to water pooling. In draw-through applications where air is pulled through the evaporator coil, maintaining an airtight system is crucial. By preventing air from being drawn into the air handler, running traps help maintain the system's efficiency and reliability. In contrast, using P-traps may not effectively prevent air intrusion, which can disrupt the airflow necessary for optimal refrigeration or heating performance. Therefore, the critical relationship between running traps and air management at the evaporator coil supports their use and emphasizes their role in ensuring effective system operation.