TCFP Plans Examiner Practice Test

What is the minimum required residual pressure when computing available fire flow in a specific area?

1. 10 psi

2. 20 psi

3. 30 psi

4. 40 psi

The correct answer is: 20 psi

The minimum required residual pressure when computing available fire flow is important because it ensures that there is sufficient water pressure to effectively fight fires. A residual pressure of 20 psi is commonly accepted as the minimum standard, as it allows fire suppression systems, such as hoses and nozzles, to operate effectively while still providing enough flow for the firefighting efforts. If the residual pressure is below this threshold, it indicates that the system cannot maintain adequate flow rates for firefighting, which may severely compromise the effectiveness of the firefighting response. This pressure is critical for ensuring that the firefighting apparatus can deliver the necessary amount of water to suppress a fire safely and efficiently. In many regulatory standards and guidelines, 20 psi serves as a benchmark that balances operational functionality with strategic water availability, making this the correct answer.