PracticeVideosBlogFlashcardsEspañol
All Practice Exams

100+ Free NV C-37A Solar Water Heating Practice Questions

Prepare for the Nevada C-37A Solar Water Heating Contractor Examination exam with instant access — no signup required.

✓ No registration✓ No credit card✓ No hidden fees✓ Start practicing immediately
100+ Questions
100% Free

Loading practice questions...

Same family resources

Explore More Nevada NSCB Contractor Examinations

Continue into nearby exams from the same family. Each card keeps practice questions, study guides, flashcards, videos, and articles in one place.

Nevada A General Engineering Contractor Examination

Practice Questions

Nevada A-10 Commercial and Residential Pools Contractor Examination

Practice Questions

Nevada A-10A Residential Pools Contractor Examination

Practice Questions

Nevada A-10B Residential Spas Contractor Examination

Practice Questions

Nevada A-10C Repair of Pools and Spas Contractor Examination

Practice Questions

Nevada A-10E Pool Alteration and Repair Contractor Examination

Practice Questions
2026 Statistics

Key Facts: NV C-37A Solar Water Heating Exam

45 Q

Official Exam Questions

PSI Nevada Contractor CIB updated 3/25/2026

32 of 45 points

Passing Score

PSI Nevada Contractor CIB updated 3/25/2026

1.5 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-37A Solar Water Heating Contractor Examination is the official NSCB/PSI open book exam: 45 questions, 32 of 45 points, 1.5 hours, USD 95 (bulletin 270, updated 3/25/2026). Official delivery: English.

Sample NV C-37A Solar Water Heating Practice Questions

Try these sample questions to test your NV C-37A Solar Water Heating exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Under NAC 624.540, which piping may a C-37A solar water-heating contractor install?
A.The water heater, storage tank, and piping that belong to the potable solar water-heating system
B.The entire building potable-water distribution system to every fixture
C.Swimming-pool circulation piping and spa equipment
D.Hydronic space-heating supply and return mains
Explanation: NAC 624.540(2)(a) authorizes C-37A work as installation of systems that collect solar energy to heat water for potable uses, but not pipes or fixtures other than water heaters and storage tanks designed for that heated water. House fixture piping is C-1D plumbing; pool work is C-37D; space heating is C-37B.
2Which copper tube type is the usual choice for a pressurized solar collector loop serving potable domestic hot water?
A.Type DWV copper, because collector loops are not under pressure
B.Type M only, because solar loops never exceed 100°F
C.Type L copper tube, listed for hot-water service and the temperatures a glazed collector can reach
D.Soft Type K refrigeration coil without joints
Explanation: Type L copper is the standard pressure tube for hot-water and solar collector loops. Glazed collectors can stagnate well above ordinary DHW temperatures, so the tube must be listed for that service. UPC Chapter 6 requires water-distribution materials to be approved for the temperature and pressure of the system.
3What is the primary reason solar collector-loop and solar-tank piping is insulated?
A.To raise the pipe's pressure rating
B.To replace the need for a temperature-and-pressure relief valve
C.To make Type M copper acceptable for buried service
D.To cut heat loss so collected energy reaches the storage tank and stays there
Explanation: Insulation keeps the heat the collectors gained from bleeding into the attic or outdoors. FSEC solar-DHW practice treats insulated supply and return as part of system performance, not decoration. Relief valves and pressure ratings are separate UPC requirements.
4When copper collector-loop tubing is joined to a steel tank fitting, what fitting is required to limit galvanic corrosion?
A.A dielectric union or other listed dielectric fitting
B.A PVC coupling
C.A rubber hose barb
D.No special fitting; solder the copper directly to the steel
Explanation: UPC water-distribution rules require a listed dielectric union or insulating fitting where dissimilar metals such as copper and steel are joined in a wet system. Without it, galvanic current eats the steel fitting. Solar tanks see hot, oxygenated water, which speeds that attack.
5Outdoor solar collector piping insulation must be protected from ultraviolet light by which method?
A.Leaving the foam bare so it can dry after rain
B.Painting closed-cell foam with leftover latex wall paint only
C.A UV-resistant jacket, cladding, or insulation listed for outdoor exposure
D.Wrapping the pipe in polyethylene vapor-barrier film only
Explanation: Sunlight destroys ordinary foam insulation in a season on a Nevada roof. FSEC installation practice and manufacturer listings require a UV-stable jacket or an insulation product listed for outdoor use. A jacket also sheds rain so the insulation stays dry and keeps its R-value.
6In a drainback solar water-heating system, outdoor collector piping is pitched so that it will do which of the following when the pump stops?
A.Hold a full water charge so the next start is instant
B.Vent steam to the roof so the loop can boil dry
C.Trap a glycol slug at each collector header
D.Drain completely by gravity into the indoor drainback reservoir
Explanation: Drainback freeze and overheat protection works only if every outdoor tube and collector header empties when the pump shuts off. FSEC and manufacturer manuals require a continuous downward pitch — commonly 1/4 inch per foot — with no sags or traps back to the indoor reservoir.
7Why is ordinary PEX generally not used for the roof collector loop of a glazed solar water heater?
A.PEX cannot be used on any hot-water line in the 2018 UPC
B.PEX cannot be insulated
C.PEX is electrically conductive and will short the differential controller
D.Collector stagnation temperatures can exceed PEX temperature ratings
Explanation: A glazed flat-plate or evacuated-tube collector can stagnate well above 200°F, which is beyond ordinary PEX listings (commonly 180°F at 100 psi). Copper or other high-temperature tube is used on the collector loop. PEX remains acceptable on the tempered potable distribution after the mixing valve.
8Per 2018 UPC Table 313.3, what is the maximum horizontal hanger spacing for 3/4-inch copper water tube?
A.32 inches
B.4 feet
C.6 feet
D.12 feet
Explanation: UPC Table 313.3 lists copper and copper-alloy tube 1-1/2 inches and smaller at 6 feet on the horizontal. A 3/4-inch collector or tank line falls in that row. Wider spacing lets the hot tube sag, which is especially dangerous on a drainback run that must empty.
9Per 2018 UPC Section 609.4, a completed potable hot-and-cold water piping section shall be tested how?
A.With 10 psi air for 5 minutes
B.A visual inspection only; pressure tests are not required on solar piping
C.With 100 psi nitrogen for 1 hour on every material including plastic
D.With potable water at not less than working pressure, or (except plastic) 50 psi air, held not less than 15 minutes without leaking
Explanation: UPC 609.4 requires the water-supply system to be proved tight under a water pressure not less than the working pressure, using potable test water, or a 50 psi air test except on plastic pipe, for not less than 15 minutes. Solar potable piping is water-distribution piping and takes the same test.
10Long copper collector-loop runs on a hot roof need expansion accommodation. Which detail is correct?
A.Anchor the tube rigidly at both ends so it cannot move
B.Use expansion loops, offsets, or flexible connectors so thermal growth does not break joints or roof flashings
C.Rely on solder joints to stretch with the tube
D.Omit hangers so the tube can slide freely on the roofing
Explanation: Copper grows several tenths of an inch per 100 feet when a collector loop swings from a cold morning to stagnation. UPC piping installation practice and FSEC manuals call for loops, offsets, or listed flex so that growth does not tear solder joints or flashings. Hangers still support the tube and should allow axial movement where designed.

About the NV C-37A Solar Water Heating Exam

The Nevada C-37A Solar Water Heating Contractor Examination is the official Nevada State Contractors Board trade examination administered by PSI Services LLC. The official exam has 45 scored questions. Passing is 32 of 45 points in 1.5 hours. The examination is open book. Uniform Plumbing 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 Plumbing Code, 2018 (allowed in center)

Time Limit

1.5 hours

Passing Score

32 of 45 points

Exam Fee

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

NV C-37A Solar Water Heating Exam Content Outline

22%

Piping

Piping (10 items)

33%

System Design

System Design (15 items)

11%

Pumps and Storage Systems

Pumps and Storage Systems (5 items)

16%

Collectors

Collectors (7 items)

7%

System Valves and Controls

System Valves and Controls (3 items)

11%

Safety

Safety (5 items)

How to Pass the NV C-37A Solar Water Heating Exam

What You Need to Know

  • Passing score: 32 of 45 points
  • Assessment: Open Book computer-based multiple-choice. Uniform Plumbing Code, 2018 (allowed in center)
  • Time limit: 1.5 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-37A Solar Water Heating 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-37A Solar Water Heating Contractor Examination?

The official PSI examination has 45 scored questions. Passing is 32 of 45 points within 1.5 hours (Candidate Information Bulletin 270, updated 3/25/2026).

How much does the NV C-37A 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-37A exam open book?

Yes. PSI lists this examination as open book. Uniform Plumbing 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.