Question 1
Which pipe material is specified by NGWA guidelines and IGSHPA standards as the primary piping for vertical closed-loop ground heat exchangers?
Correct Answer:
High-density polyethylene (HDPE) SDR-11
Question 2
What does the designation 'SDR-11' mean when applied to HDPE pipe used in closed-loop geothermal systems?
Correct Answer:
The standard dimension ratio, meaning the outside diameter divided by the wall thickness equals 11
Question 3
Which ASTM standard governs the requirements for HDPE pipe (PE3408/PE4710) used in vertical closed-loop geothermal installations?
Correct Answer:
ASTM F714
Question 4
What type of heat-fusion joint is formed when two HDPE pipe ends are heated against a flat, heated plate and then pressed together?
Correct Answer:
Butt fusion
Question 5
During a butt fusion joint, what is the purpose of the 'heater removal and pipe joining' step being completed as quickly as possible?
Correct Answer:
To prevent the melt bead from cooling and solidifying before fusion pressure is applied
Question 1
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About this Exam

Prepare with the CVCLD Practice Questions - NGWA Certified Vertical Closed Loop Driller Exam practice quiz. This question bank includes 100 questions covering geothermal, closed-loop, vertical, borehole, and loop. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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CVCLD Practice Questions - NGWA Certified Vertical Closed Loop Driller Exam

This practice set contains 100 questions from the matching question bank and focuses on geothermal, closed-loop, vertical, borehole, and loop. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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