NM CID MM-2 Practice Questions - New Mexico CID MM-2 Natural Gas Fitting Examination Exam

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An existing natural-gas system operates at 7 inches water column (about 0.25 psi). Using the 14.9.2.21 NMAC existing-system exception, what is the minimum test pressure?

0.38 psi (1.5 × 0.25 psi) 60 psi 10 psi, because the existing-system exception never applies 3 psi, because 1.5 times operating pressure is below the 3 psi floor

Correct Answer:

3 psi, because 1.5 times operating pressure is below the 3 psi floor

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