NFPA-99 Practice Exam

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Prepare for your NFPA-99 exam with our comprehensive quiz. Test your knowledge with multiple choice questions that cover essential topics. Get ready to conquer the NFPA-99 certification!

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When should the initial pressure test be conducted by the installer?

After blowdown of the distribution piping.
After installation of alarm sensors.
Before blowdown of distribution piping.
Before installation of station rough-in assembly.

The correct answer is: After blowdown of the distribution piping.

The initial pressure test should be conducted by the installer after the blowdown of the distribution piping. This timing is crucial because the blowdown process is intended to remove any debris or contaminants from the piping system that could interfere with the testing and operation of the system. Performing the pressure test only after ensuring that the pipes are clean allows for a more accurate assessment of the system's integrity. Conducting the pressure test after blowdown ensures that any weak points, leaks, or issues in the piping system can be identified and addressed before the system is put into operation. Testing in a contaminated environment could lead to undetected issues, which might compromise system reliability or safety. Thus, timing the pressure test after blowing down the distribution piping is essential for maintaining the system's performance and compliance with safety standards.