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100+ Free NV C-13 Sheet Metal Practice Questions

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2026 Statistics

Key Facts: NV C-13 Sheet Metal Exam

60 Q

Official Exam Questions

PSI Nevada Contractor CIB updated 3/25/2026

70%

Passing Score

PSI Nevada Contractor CIB updated 3/25/2026

2.5 hours

Time Allowed

PSI Nevada Contractor CIB updated 3/25/2026

USD 95

PSI Exam Fee (one portion)

PSI Nevada Contractor CIB updated 3/25/2026

Open Book

Book Policy

PSI Nevada Contractor CIB updated 3/25/2026

Nevada C-13 Sheet Metal Contractor Examination is the official NSCB/PSI open book exam: 60 questions, 70% (42 of 60 points), 2.5 hours, USD 95 (bulletin 270, updated 3/25/2026). Official delivery: English.

Sample NV C-13 Sheet Metal Practice Questions

Try these sample questions to test your NV C-13 Sheet Metal exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Under NAC 624.300, which task is outside the Nevada C-13 sheet-metal classification?
A.Fabricating and installing a galvanized rain leader and downspout
B.Installing a packaged rooftop unit that uses refrigeration as an integral part of the system
C.Forming and installing a standing-seam metal roof panel system
D.Fabricating a stainless-steel steam-table pan for food-service equipment
Explanation: NAC 624.300 authorizes C-13 work on cornices, flashings, gutters, leaders, downspouts, pans, food-service equipment, ducts, louvres, patented chimneys, flues, and metal roof systems. The same section expressly does not authorize fabricating or installing equipment that uses refrigeration as an integral part of the system. That refrigeration work belongs to another classification.
2How are airflow (CFM), average velocity (FPM), and internal cross-sectional area (square feet) related in a sheet-metal duct?
A.CFM equals velocity plus area
B.CFM equals velocity divided by area
C.CFM equals area times velocity (Q = A × V)
D.CFM equals area minus velocity
Explanation: Continuity requires Q = A × V. Airflow in cubic feet per minute equals internal area in square feet times average velocity in feet per minute. Rectangular area is (width in inches × height in inches) / 144. This identity is the basis of every duct-area and CFM item on the open-book C-13 exam.
3A rectangular galvanized duct measures 20 inches wide by 16 inches high and carries 2,000 CFM. What is the average air velocity?
A.720 feet per minute
B.900 feet per minute
C.1,150 feet per minute
D.1,440 feet per minute
Explanation: Internal area is (20 × 16) / 144 = 2.222 square feet. Velocity is 2,000 CFM ÷ 2.222 sq ft = 900 FPM. That is a typical low-velocity commercial supply-main speed and is the identity used to check a sized duct under 2018 UMC Section 601.2.
4A 14-inch inside-diameter round spiral duct carries 1,200 CFM. What is the approximate average velocity?
A.780 feet per minute
B.980 feet per minute
C.1,120 feet per minute
D.1,470 feet per minute
Explanation: Round area is π × (D/12)² / 4. For a 14-inch duct, D/12 = 1.167 ft, so area ≈ 1.069 square feet. Velocity is 1,200 ÷ 1.069 ≈ 1,123 FPM, which rounds to about 1,120 FPM. Do not apply the rectangular (W × H)/144 formula to a round duct.
5An 18-inch by 12-inch rectangular branch is designed to run at 800 FPM. What airflow does that duct carry?
A.800 CFM
B.1,000 CFM
C.1,200 CFM
D.1,600 CFM
Explanation: Area is (18 × 12) / 144 = 1.50 square feet. Airflow is velocity times area: 800 FPM × 1.50 sq ft = 1,200 CFM. Q = A × V is the same identity used to check Manual D or other approved duct sizes under 2018 UMC Section 601.2.
6Per 2018 UMC Section 601.2, blower-type heating, cooling, and ventilation duct systems shall be sized in accordance with which method?
A.ACCA Manual D, or other approved methods
B.Any shop rule of thumb posted at the brake
C.Only equal-friction charts printed on the fan carton
D.Only the International Residential Code Appendix M
Explanation: 2018 UMC Section 601.2 requires duct systems that are portions of blower-type heating, cooling, absorption, evaporative-cooling, or outdoor-air ventilation systems to be sized in accordance with ACCA Manual D as listed in Table 1701.1, or by other approved methods. Guessing a size from a fan label or an unlisted rule of thumb is not an approved method.
7Under 2018 UMC Section 603.4.1, what is the maximum length of a factory-made flexible air duct or connector used as an elbow at a terminal device in a commercial building?
A.3 feet
B.5 feet
C.14 feet
D.25 feet
Explanation: 2018 UMC Section 603.4.1 limits factory-made flexible air ducts and connectors used as an elbow at a terminal device to 5 feet and does not allow flex to replace rigid elbows or fittings in commercial buildings. The 14-foot figure is a common flexible-connector limit in other codes, not this UMC commercial elbow rule. Residential occupancies retain a longer-flex exception.
8Per the 2018 UMC, plastic air ducts and fittings are limited to which installation and maximum design temperature?
A.Underground installations only, 150°F
B.Exposed rooftop mains, 180°F
C.Grease ducts serving Type I hoods, 250°F
D.Above-grade supply only, 200°F
Explanation: 2018 UMC plastic-duct provisions require PVC duct with a minimum pipe stiffness of 8 psi at 5 percent deflection (ASTM D2412). Fittings may be PVC or high-density polyethylene. Plastic duct and fittings are for underground installations only, and the maximum design temperature is 150°F (66°C). Plastic is not a grease-duct material.
9Which shop-formed longitudinal seam is the usual lock on rectangular galvanized HVAC duct?
A.Standing-seam roof clip
B.Grooved lock used only on copper roofing
C.Pittsburgh lock
D.Dovetail lock used only on round spiral
Explanation: The Pittsburgh lock is the standard rectangular-duct longitudinal seam: one edge is roll-formed into a pocket and the other is inserted and hammered or buttoned closed. It is produced on a lockformer and is distinct from roof standing seams or copper grooved locks.
10In SMACNA-style rectangular low-pressure duct, which transverse joint uses a flat S-slip on the long sides and drive cleats on the short sides?
A.S-and-drive (flat S-cleat) joint
B.TDC/TDF 4-bolt flange only
C.Companion-angle bolted flange
D.Welded standing seam
Explanation: The S-and-drive joint is the standard low-pressure rectangular transverse connection: a flat S-cleat slips over the turned-out flanges on the wide sides, and drive cleats lock the short sides. Companion-angle and TDC/TDF flanges are heavier, gasketed systems used on higher pressure classes or where sections must be removed.

About the NV C-13 Sheet Metal Exam

The Nevada C-13 Sheet Metal Contractor Examination is the official Nevada State Contractors Board trade examination administered by PSI Services LLC. The official exam has 60 scored questions. Passing is 70% (42 of 60 points) in 2.5 hours. The examination is open book. Uniform Mechanical Code, 2018 and International Building Code, 2018 (allowed in center). PSI lists USD 95 for one examination portion and USD 140 if taken with CMS; otherwise USD 95 per trade exam (Candidate Information Bulletin 270, updated 3/25/2026). NSCB requires a separate CMS examination for most new applicants, plus a USD 300 application fee and a USD 600 biennial license fee. This English-language MCQ bank is a study aid, not an official PSI form. It does not replace required trade experience, board approval, fingerprints, bonding, or the official examination.

Assessment

Open Book computer-based multiple-choice. Uniform Mechanical Code, 2018 and International Building Code, 2018 (allowed in center)

Time Limit

2.5 hours

Passing Score

70% (42 of 60 points)

Exam Fee

USD 95 (PSI Services LLC (for the Nevada State Contractors Board))

NV C-13 Sheet Metal Exam Content Outline

33%

Ducts

Ducts (20 items)

13%

Chimneys, Flues, and Vents

Chimneys, Flues, and Vents (8 items)

17%

Hoods, Ventilation, Equipment, and Food Service Equipment

Hoods, Ventilation, Equipment, and Food Service Equipment (10 items)

17%

Metal Roofing Systems, Flashing, and Architectural Metals

Metal Roofing Systems, Flashing, and Architectural Metals (10 items)

8%

Gutters and Downspouts

Gutters and Downspouts (5 items)

7%

Tools and Equipment

Tools and Equipment (4 items)

5%

Safety

Safety (3 items)

How to Pass the NV C-13 Sheet Metal Exam

What You Need to Know

  • Passing score: 70% (42 of 60 points)
  • Assessment: Open Book computer-based multiple-choice. Uniform Mechanical Code, 2018 and International Building Code, 2018 (allowed in center)
  • Time limit: 2.5 hours
  • Exam fee: USD 95

Keys to Passing

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

NV C-13 Sheet Metal Study Tips from Top Performers

1Distribute study time to the official bulletin 270 content outline (updated 3/25/2026)
2Use only the PSI-listed references; temporary tabs such as Post-it notes are prohibited
3Confirm NSCB experience documentation before scheduling with PSI
4This bank is an English-language MCQ study aid, not an official PSI form

Frequently Asked Questions

How many questions are on the Nevada C-13 Sheet Metal Contractor Examination?

The official PSI examination has 60 scored questions. Passing is 70% (42 of 60 points) within 2.5 hours (Candidate Information Bulletin 270, updated 3/25/2026).

How much does the NV C-13 exam cost?

PSI lists USD 95 for one examination portion. Two portions cost USD 140 only if the second portion is CMS. NSCB charges a separate USD 300 application fee and USD 600 biennial license fee.

Is the NV C-13 exam open book?

Yes. PSI lists this examination as open book. Uniform Mechanical Code, 2018 and International Building Code, 2018 (allowed in center)

Do I still need the CMS examination?

CMS is the required Nevada business-and-law examination. Most new applicants must pass CMS and a trade examination for the requested classification. In most cases you will not retake an exam if you have actively served as a qualified employee in the same classification within the last four years.