Question 1
Under NAC 624.380, which work is authorized for a Nevada C-21C sheet metal contractor but expressly excluded from the classification?
Correct Answer:
Fabrication and installation of HVAC ducts, flashings, and metal roof systems, but not equipment that uses refrigeration as an integral part of the system
Question 2
Why is lock-forming-quality galvanized steel the usual material for low-pressure HVAC supply and return ducts under UMC 2018 Chapter 6?
Correct Answer:
It forms Pittsburgh and snap-lock seams, resists ordinary indoor corrosion, and meets SMACNA HVAC Duct Construction Standards
Question 3
What is the relationship used to size HVAC duct airflow from a known cross-section and velocity?
Correct Answer:
CFM equals cross-sectional area in square feet times velocity in feet per minute
Question 4
Which longitudinal seam is the standard shop-formed lock on rectangular galvanized HVAC duct?
Correct Answer:
Pittsburgh lock
Question 5
On a low-pressure rectangular HVAC duct, which pair of fittings makes the ordinary transverse joint?
Correct Answer:
An S-slip on the long sides and drive cleats on the short ends
Question 1
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Prepare with the NV C-21C Sheet Metal Practice Questions - Nevada C-21C Sheet Metal Contractor Examination Exam practice quiz. This question bank includes 100 questions covering duct, c-21c, hvac, inch, and rectangular. 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-21C Sheet Metal Practice Questions - Nevada C-21C Sheet Metal Contractor Examination Exam

This practice set contains 100 questions from the matching question bank and focuses on duct, c-21c, hvac, inch, and rectangular. 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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