Gas Fitter Practice Test

When a baffle is required to prevent rain from entering an air supply opening, by how much can the baffle reduce the required free area of the opening?

1. 0%

2. 1%

3. 3%

4. 5%

The correct answer is: 0%

The baffle is a critical component designed to protect air supply openings from adverse weather conditions, such as rain. When a baffle is effectively installed, it serves to redirect the flow of air and prevent rainwater from entering the opening while still allowing airflow. In this case, if the question pertains to the impact of the baffle on the required free area of the opening, the answer indicates that the presence of the baffle does not necessitate a reduction in the free area requirement. This means that the original free area specified for the opening remains unchanged, with the baffle's design being adequate enough to maintain airflow without compromising the area needed for effective operation. The other options imply a reduction in the required free area based on the installation of the baffle, suggesting that a percentage of the area could be lessened. However, the design considerations for baffles typically ensure that they do not require any reduction in the free area; hence, maintaining the original area is validated through proper engineering practices. This is pivotal in ensuring that both airflow and protection from inclement weather are accomplished effectively.