NV A-10E Pool Alteration Practice Questions - Nevada A-10E Pool Alteration And Repair Contractor Examination Exam

A sand filter on a hotel pool reads 10 psi when clean. When should the A-10E technician backwash?

When the gauge returns to 0 psi On a fixed 24-hour clock regardless of pressure When operating pressure rises about 8 to 10 psi above the clean starting pressure Only when the water is visibly green

Correct Answer:

When operating pressure rises about 8 to 10 psi above the clean starting pressure

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