CVCLD Practice Questions - NGWA Certified Vertical Closed Loop Driller Exam

What does the designation 'SDR-11' mean when applied to HDPE pipe used in closed-loop geothermal systems?

The standard dimension ratio, meaning the outside diameter divided by the wall thickness equals 11 The pipe has an 11-inch inside diameter The pipe is rated for 11 bar operating pressure The pipe was manufactured to Schedule 11 specifications

Correct Answer:

The standard dimension ratio, meaning the outside diameter divided by the wall thickness equals 11

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