NV C-37 Solar Practice Questions - Nevada C-37 Solar Contractor Examination Exam

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A glazed DHW array is designed for 1.2 gpm. Which Type L copper size is the usual FSEC choice for that collector-loop flow while staying near 4 fps?

3/8 inch Type L (about 0.9 gpm at 4 fps) as the only run 4 inch Schedule 40 PVC 2 inch Type L so velocity stays under 0.5 fps 1/2 inch Type L (about 2.9 gpm at 4 fps) or 3/4 inch if the run is long

Correct Answer:

1/2 inch Type L (about 2.9 gpm at 4 fps) or 3/4 inch if the run is long

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