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Question 1
Threaded steel joints on C-21G industrial water, steam, and fuel-gas piping under the 2018 UPC/UMC shall be made with:
Correct Answer:
Standard taper pipe threads (NPT) and an approved thread compound or tape on the male threads
Question 2
A C-21G crew finds a pair of 4-inch raised-face flanges 3/8 inch out of parallel. The correct way to close the joint is to:
Correct Answer:
Correct the pipe fit-up (cut, reweld, or add a spool) so the flanges meet square, then tighten the bolts evenly
Question 3
A roll-grooved or cut-grooved mechanical coupling on C-21G industrial water or process pipe is acceptable only when:
Correct Answer:
The groove dimensions, coupling, and gasket are listed for that pipe, pressure, temperature, and fluid
Question 4
A 45-degree offset on a C-21G industrial chilled-water line must rise 18 inches center-to-center. The travel (center-to-center length of the offset piece) is closest to:
Correct Answer:
25-1/2 inches
Question 5
A 4-inch Schedule 40 C-21G process-water spool uses two long-radius 90-degree elbows. The required center-to-center distance between elbow centers is 60 inches. Using a long-radius takeout of 6 inches per 4-inch 90 (1.5 × NPS), the cut length of the straight pipe between the two welds is:
Correct Answer:
48 inches
Question 1
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About this Exam

Prepare with the NV C-21G Industrial Piping Practice Questions - Nevada C-21G Industrial Piping Contractor Examination Exam practice quiz. This question bank includes 100 questions covering c-21g, industrial, line, inch, and water. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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NV C-21G Industrial Piping Practice Questions - Nevada C-21G Industrial Piping Contractor Examination Exam

This practice set contains 100 questions from the matching question bank and focuses on c-21g, industrial, line, inch, and water. 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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