California ICC UST Inspector Practice Exam

What is NOT correct regarding the testing of newly installed primary pressurized piping?

1. Hydrostatically at 150% of designed operating pressure

2. Pneumatically at 110% of designed operating pressure

3. Automatic tank gauge 0.1 gph test

4. The minimum test pressure is 40 psi

The correct answer is: Automatic tank gauge 0.1 gph test

The testing of newly installed primary pressurized piping typically requires specific protocols to ensure the integrity and safety of the system. When evaluating the choice that does not align with these protocols, it is important to understand the context of the testing methods. The hydrostatic test, conducted at 150% of the designed operating pressure, is a standard practice. This test helps identify any leaks or weaknesses in the piping system by applying high pressure with a liquid. Pneumatic testing at 110% of the designed operating pressure is also accepted under certain conditions, but it involves risks due to the compressibility of gases, thus strict guidelines must be followed. The minimum test pressure of 40 psi ensures a baseline level of pressure is maintained during testing to verify the system's performance under operational conditions. In contrast, automatic tank gauge testing of 0.1 gallons per hour (gph) is not typically a method used for testing newly installed primary pressurized piping. This testing method is more relevant for monitoring fuel tank integrity rather than evaluating newly installed piping, making it the least applicable option in this context. Understanding these testing distinctions is crucial for ensuring the safety and regulatory compliance of underground storage tank systems.