Master Plumber Practice Exam

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Study for the Master Plumber Exam. Practice with detailed questions and explanations. Ensure your readiness for the certification!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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What is the requirement for testing hot and cold water piping systems, aside from plastic piping?

100 psi air for at least 10 minutes
35 psi air for at least 15 minutes
50 psi air or the working pressure for at least 15 minutes
40 psi air or 150 psi water for 10 minutes

The correct answer is: 50 psi air or the working pressure for at least 15 minutes

The requirement for testing hot and cold water piping systems, aside from plastic piping, specifies using a pressure that either meets or exceeds the working pressure of the system for a duration of at least 15 minutes. This ensures that the system is capable of holding pressure under normal operating conditions and can help identify any potential leaks or weaknesses in the piping. Utilizing 50 psi air or the working pressure for a minimum of 15 minutes is a standard testing procedure in plumbing, as it provides a consistent method to check the integrity of the system while avoiding damage that could occur with higher pressures or different mediums. This method is essential not only for compliance with plumbing codes but also for ensuring the long-term reliability and safety of the system. In contrast, the other options either suggest pressures that do not meet typical requirements for safety or testing effectiveness, or suggest testing protocols that may not account adequately for the variations between different materials or system specifications. Therefore, the correct choice aligns with established plumbing safety practices and standards.