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A ground source heat pump loop system should be pressure tested for how many minutes at what pressure?

  1. 15 minutes at 75 psig

  2. 30 minutes at 100 psig

  3. 60 minutes at 150 psig

  4. 45 minutes at 200 psig

The correct answer is: 30 minutes at 100 psig

A ground source heat pump loop system is typically pressure tested to ensure that the system is sealing properly, preventing any potential leaks that could compromise its efficiency. The correct answer specifies a testing duration of 30 minutes at a pressure of 100 psig. This duration and pressure level strike a balance between being thorough enough to identify any leaks and manageable in terms of the potential stress on the system's components. Testing for 30 minutes provides a significant amount of time to allow any minor leaks to develop, which might not be visible initially but could become apparent during a longer testing period. The pressure of 100 psig is usually within a safe range for many components used in these systems, ensuring that the test does not introduce undue stress that could cause failure while still being high enough to effectively detect leaks. Overall, the parameters of this pressure test are designed to maintain system integrity while ensuring operational safety and efficiency in ground source heat pump loop systems.