NM CID MS-6 Practice Questions - New Mexico CID MS-6 Lawn Sprinklers Examination Exam

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Spray nozzles on a zone are rated at 30 psi. After elevation, pipe, backflow, and valve losses, the last head has 22 psi. The most correct design response is to:

Accept the zone; any pressure above 15 psi is adequate for sprays Reduce pipe size to raise velocity and restore pressure Lower friction or zone GPM, or both, until the last head is near 30 psi Install unmatched larger nozzles at the far heads only

Correct Answer:

Lower friction or zone GPM, or both, until the last head is near 30 psi

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