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100+ Free NV C-37D Solar Pool Heating Practice Questions

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2026 Statistics

Key Facts: NV C-37D Solar Pool 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-37D Solar Pool 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-37D Solar Pool Heating Practice Questions

Try these sample questions to test your NV C-37D Solar Pool 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(2)(d), which piping is within the Nevada C-37D Solar Pool Heating scope?
A.Piping that connects solar collectors and heat exchangers used to heat a pool or spa with solar energy
B.The pool's main-drain, skimmer, and return-jet circulation plumbing
C.Potable fixture branches to lavatories and showers
D.Photovoltaic DC homeruns from modules to an inverter
Explanation: NAC 624.540(2)(d) authorizes C-37D to install the collectors, piping, and heat exchangers used to heat swimming pools and spas with solar energy. The same subsection expressly excludes the plumbing of swimming pools and the installation of their equipment. Fixture plumbing is C-1D work, and PV is not a C-37 thermal system.
2What piping material is the usual choice for an unglazed solar-pool collector loop that circulates filtered pool water at about 80°F?
A.Schedule 40 PVC listed for the temperature and pressure of the pool-solar loop
B.Type M DWV copper used for waste stacks
C.Unlisted thin-wall automotive heater hose as the entire roof run
D.Type K copper with 50/50 lead-tin waste solder
Explanation: FSEC pool-heating practice and manufacturer listings use Schedule 40 PVC for unglazed pool-solar feed and return because the water is only a few degrees above pool temperature, well below PVC's ordinary 140°F service. UPC Chapter 6 still requires the pipe to be approved for the system's temperature and pressure. DWV copper and 50/50 solder are waste-system products, not solar-loop materials.
3Why is Schedule 40 PVC acceptable on a typical unglazed solar-pool loop but not on a glazed potable-DHW collector loop?
A.Pool-solar water stays near 80°F, while a glazed DHW collector can stagnate well above PVC's temperature rating
B.PVC is listed only for natural-gas service
C.The UPC bans all plastic pipe outdoors
D.PVC cannot be solvent-cemented
Explanation: FSEC-EN-6-97 notes that unglazed pool collectors heat thousands of gallons to about 80°F, while glazed DHW collectors raise a small tank to about 130°F and can stagnate much hotter. Listed PVC is typically limited near 140°F. That is why FSEC and UPC practice keep PVC on the cool pool loop and copper (or other high-temperature tube) on glazed DHW collectors.
4Where should the solar-collector feed tee be taken on an existing pool circulation system?
A.After the existing filter, so only filtered water enters the collectors
B.On the suction line before the pump, so the pump never sees solar head
C.Out of an unfiltered main-drain branch that C-37D newly installs
D.Out of the automatic chlorinator so chemicals precondition the panels
Explanation: FSEC-EN-6-97 and FSEC-IN-23-83 show the solar feed after the filter: pool to pump to filter to collectors. Debris that bypasses the filter clogs the small passages in unglazed panels. C-37D connects to the existing filtered line; it does not install the pool filter, pump, or main drain.
5If the pool already has an automatic chlorinator, where does the solar-collector return rejoin the existing piping?
A.Upstream of the chlorinator so treated water is not pumped through the collectors
B.Downstream of the chlorinator so chlorine sterilizes the roof array
C.Into the pump suction so the chlorinator never sees solar flow
D.Into a new skimmer that the C-37D contractor installs
Explanation: FSEC-EN-6-97 sequences the loop as filter to collectors to any backup heater to the chlorinator, then back to the pool. Concentrated chlorine sitting in polypropylene panels attacks the plastic and the UV inhibitors. C-37D ties into the existing treated-water piping; it does not install the chlorinator or a new skimmer.
6Outdoor Schedule 40 PVC solar-pool piping that is exposed to Nevada sun must be protected how?
A.Painted or jacketed with a UV-resistant coating listed for outdoor PVC, or installed as UV-stabilized pipe
B.Left bare because PVC is immune to ultraviolet light
C.Wrapped only with ordinary fiberglass duct wrap and no jacket
D.Covered with interior latex wall paint
Explanation: Unprotected PVC becomes brittle under ultraviolet light. FSEC installation practice and UPC material listings require outdoor plastic pipe to be UV-stabilized or painted/jacketed for outdoor exposure. Nevada's high desert UV makes that detailing mandatory on roof and rack runs.
7How must unglazed solar-pool feed and return piping be pitched on a drain-back system?
A.Continuously sloped so every collector and pipe segment drains by gravity when the pump stops
B.Installed dead-level so water remains in the panels overnight
C.Pitched toward the roof peak so air is trapped at the low points
D.Run uphill from the collectors to a sealed high point with no air inlet
Explanation: FSEC-IN-23-83 states that drain-back freeze protection requires the collectors and piping to be sloped so they empty when the pump shuts off. Belly sags hold water that freezes and splits headers. A vacuum breaker then admits air so the siphon can break and the array can finish draining.
8Per 2018 UPC Table 313.3, horizontal PVC or ABS piping used on a solar-pool loop shall be supported at intervals not exceeding:
A.4 feet
B.32 inches
C.6 feet
D.12 feet
Explanation: Table 313.3 lists 4 feet as the maximum horizontal spacing for PVC/ABS (and for PEX 1-1/4 inch and larger). Wider spacing lets sun-warmed plastic sag, which creates freeze traps on a drain-back run. Do not apply the copper 6-foot row or the steel 12-foot row to PVC.
9Per 2018 UPC Table 313.3, horizontal copper water tube 1-1/2 inches and smaller used on a solar-pool heat-exchanger loop shall be supported at intervals not exceeding:
A.6 feet
B.32 inches
C.4 feet
D.12 feet
Explanation: Table 313.3 limits horizontal copper and copper-alloy tubing 1-1/2 inches and smaller to 6 feet. Copper 2 inches and larger may go 10 feet. Vertical copper is supported at each floor, not more than 10 feet. A C-37D closed heat-exchanger loop that uses copper takes the same hanger row as any other UPC water tube.
10Per 2018 UPC Section 609.4, a completed solar-pool water-piping section shall be tested how?
A.With water at not less than working pressure, or (except plastic) 50 psi air, held not less than 15 minutes without leaking
B.With 10 psi air for 5 minutes on every material including PVC
C.With a 10-foot head of water for 15 minutes, the DWV test in UPC 712.2
D.By visual inspection only; pressure tests are not required on solar piping
Explanation: UPC 609.4 requires the water-supply system to be proved tight under a water pressure not less than the working pressure, or a 50 psi air test except on plastic pipe, for not less than 15 minutes. Solar-pool PVC is water piping for this purpose and takes the water test, not an air test. The 10-foot head test is a drainage rule, not a water-pipe rule.

About the NV C-37D Solar Pool Heating Exam

The Nevada C-37D Solar Pool 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-37D Solar Pool 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-37D Solar Pool 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-37D Solar Pool 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-37D Solar Pool 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-37D 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-37D 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.