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Key Facts: NV C-1I Chilled-Water Piping Exam

30 Q

Official Exam Questions

PSI Nevada Contractor CIB updated 3/25/2026

70%

Passing Score

PSI Nevada Contractor CIB updated 3/25/2026

75 minutes

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-1I Chilled-Water Piping Contractor Examination is the official NSCB/PSI open book exam: 30 questions, 70% (21 of 30 points), 75 minutes, USD 95 (bulletin 270, updated 3/25/2026). Official delivery: English.

Sample NV C-1I Chilled-Water Piping Practice Questions

Try these sample questions to review concepts for the NV C-1I Chilled-Water Piping exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Per NAC 624.190(2)(i), a Nevada C-1I chilled-water piping contractor is authorized to fabricate, install, repair, and remove which of the following?
A.The chiller evaporator barrel, compressor, and condenser
B.Pipes, pumps, valves, and other equipment used to transfer chilled water for temperature control
C.Direct-expansion refrigerant piping that is an integral part of a packaged rooftop unit
D.Cooling-tower fill, fans, and basin heaters
Explanation: NAC 624.190(2)(i) defines C-1I work as the fabrication, installation, repair, and removal of pipes, pumps, valves, and other equipment used in the transfer of chilled water for the control of temperature. The same paragraph expressly does not authorize fabricating, installing, repairing, removing, or connecting to a chiller. Chillers and cooling-tower equipment fall under other classifications such as C-21 refrigeration and air-conditioning.
2ASTM B88 copper water tube used on a chilled-water loop is identified in the field by which standard color marking?
A.Type K green, Type L blue, Type M red
B.Type K red, Type L green, Type M yellow
C.Type K yellow, Type L orange, Type M black
D.Type K blue, Type L red, Type M green
Explanation: ASTM B88 hard-drawn and annealed copper water tube is marked Type K (thickest wall, green), Type L (medium wall, blue), and Type M (thinnest water-tube wall, red). Those colors are how a C-1I crew confirms wall thickness on the open-book job and on the PSI exam. Type DWV copper is a different, thinner drainage product and is not a B88 water-tube type.
3Which copper product is appropriate for a pressurized closed chilled-water main, and which product is not?
A.Type DWV copper is preferred; Type L is drainage only
B.Type M copper is required underground; Type K is indoor only
C.ASTM B88 Type K, L, or M copper water tube is used for hydronic pressure piping; Type DWV copper is not a pressure water-tube product
D.Soft-temper medical-gas tube is the only listed chilled-water material
Explanation: UMC 2018 Table 1210.1 lists copper and copper-alloy pipe and tubing that comply with the hydronic material standards, which for water tube means ASTM B88 Types K, L, and M rated for the system temperature and pressure. Type DWV copper is a drainage, waste, and vent product with a thinner wall and is not a hydronic pressure tube. Type L is the everyday above-ground chilled-water spec; Type K is commonly used underground because of its extra wall.
4Black steel chilled-water pipe installed above ground on a commercial Nevada job is most commonly specified as which product?
A.ASTM A53 Grade B Schedule 40, welded, grooved, or threaded as listed
B.ASTM A106 Schedule 160 only, because chilled water is a high-pressure steam service
C.Galvanized thin-wall EMT conduit
D.Unlisted fence-post tubing with no ASTM mark
Explanation: UMC 2018 Table 1210.1 accepts steel pipe that complies with the listed ASTM standards, and ASTM A53 Grade B Schedule 40 is the ordinary commercial chilled-water product. Joints are welded, grooved, flanged, or threaded within the listing and the pipe schedule. Chilled water is a low-temperature hydronic service, not high-pressure steam, so Schedule 160 A106 is not the default.
5Why is black steel generally preferred over galvanized steel on a closed chilled-water loop?
A.Zinc on galvanized pipe can flake into the closed loop and does not add useful corrosion protection once the system is treated and sealed
B.Galvanized coatings are required by UMC Chapter 12 on every closed loop
C.Black steel is listed only for steam, so galvanized must be used for chilled water
D.Galvanized pipe cannot be insulated
Explanation: A closed, chemically treated chilled-water loop does not need a zinc coating, and loose zinc can foul strainers, control valves, and pump seals. Black steel complying with Table 1210.1 is the standard ferrous product. Galvanized pipe is more often seen on open condenser-water or domestic lines, not on a sealed CHW circuit.
6PEX tubing used on a chilled-water loop that also contains steel pumps, tanks, or valves should be which product?
A.Oxygen-barrier PEX (or PEX-AL-PEX) listed for hydronic service in UMC Table 1210.1
B.Non-barrier plumbing PEX, because oxygen helps the inhibitors
C.PEX-AL-PEX only if the aluminum layer is perforated
D.Any orange electrical HDPE conduit
Explanation: UMC 2018 hydronic material rules and Table 1210.1 accept listed PEX, PE-RT, and PEX-AL-PEX for hydronic service. When the loop has ferrous components, oxygen-barrier tubing (or the aluminum core in PEX-AL-PEX) is required so atmospheric oxygen cannot diffuse through the plastic wall and corrode iron. Ordinary plumbing PEX without a barrier is the wrong product on a steel-containing chilled-water circuit.
7A 2-inch Type L hard-drawn copper chilled-water riser is joined with 95/5 tin-antimony solder. Which statement is correct for UMC 2018 hydronic service?
A.95/5 solder is a listed joining method for copper hydronic tube when the joint is made per the listing and the tube is rated for the system pressure and temperature
B.Only lead-tin 50/50 solder is permitted on chilled-water copper
C.Soldered joints are forbidden; every copper CHW joint must be a welded steel transition
D.Solder is allowed only on Type DWV copper
Explanation: UMC 2018 Chapter 12 and Table 1210.1 accept copper tube joined by soldered, brazed, press-connect, or other listed methods when the filler and fittings match the tube listing. 95/5 tin-antimony is the common lead-free solder for hydronic copper. 50/50 lead-tin is obsolete and is not used on modern water systems. The joint must still be rated for the chilled-water pressure, which is well within Type L copper capacity at 40–60°F.
8Where copper chilled-water tube is joined to a steel pump flange or steel main, UPC 2018 Sections 605.15 and 605.16 require which fitting?
A.A sanitary tee laid on its back
B.A no-hub shielded coupling listed only for cast-iron DWV
C.A dielectric union or other listed dielectric fitting
D.A brass cleanout plug
Explanation: UPC 605.15 and 605.16 require a dielectric union or other listed dielectric fitting when copper or copper-alloy tube is joined to galvanized or carbon steel. Without isolation, galvanic current consumes the steel at the joint. The same rule is used on chilled-water transitions at pumps, tanks, and steel mains.
9Grooved mechanical couplings on Schedule 40 steel chilled-water pipe are acceptable when which conditions are met?
A.The couplings are listed for hydronic service, the groove is cut or rolled to the listing, and the gasket is compatible with chilled water or glycol
B.Any irrigation clamp may be used if it is painted blue
C.Grooved joints are allowed only on steam mains above 250°F
D.The groove may be cut with a torch as long as the coupling snaps on
Explanation: UMC 2018 Table 1210.1 and the joining rules accept listed mechanical grooved joints on steel hydronic pipe. The groove dimensions, gasket compound (typically EPDM for chilled water), and bolt torque must follow the coupling listing. A torch-cut groove or a non-listed irrigation clamp is not a pressure joint.
10Which gasket compound is the ordinary choice for grooved couplings on a 45°F chilled-water or inhibited-glycol loop?
A.EPDM (or the coupling manufacturer's equivalent hydronic compound)
B.Compressed asbestos sheet leftover from an old steam job
C.Unlisted paper fiber cut from a carton
D.Lead wool
Explanation: EPDM is the standard grooved-coupling gasket for cold water and most inhibited glycol loops. It stays flexible at chilled-water temperature and is the compound the coupling listings name for HVAC water. Steam or petroleum services use different compounds; leftover asbestos and paper fiber are not acceptable.

About the NV C-1I Chilled-Water Piping Exam

The Nevada C-1I Chilled-Water Piping Contractor Examination is the official Nevada State Contractors Board trade or management examination administered by PSI Services LLC. The official exam has 30 scored questions. Passing is 70% (21 of 30 points) in 75 minutes. The examination is open book. Approved center references include UPC 2018 and UMC 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 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.

Exam sponsor: PSI Services LLC (for the Nevada State Contractors Board). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

Open Book computer-based multiple-choice. UPC 2018 and UMC 2018 (allowed in center)

Time Limit

75 minutes

Passing Score

70% (21 of 30 points)

Exam / Certification Fees

USD 95

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

33%

Piping Materials

Chilled-water piping materials (10 items)

33%

Piping Installation

Installation methods (10 items)

23%

Valves, Controls, Pumps, and Equipment

Valves, controls, pumps (7 items)

10%

Safety

Piping safety (3 items)

Preparing for the NV C-1I Chilled-Water Piping Exam

What You Need to Know

  • Passing score: 70% (21 of 30 points)
  • Assessment: Open Book computer-based multiple-choice. UPC 2018 and UMC 2018 (allowed in center)
  • Time limit: 75 minutes
  • Exam / certification fees: USD 95 Official sources

Using Our Practice Resources

  • 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-1I Chilled-Water Piping: Suggested Study Strategy

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-1I Chilled-Water Piping Contractor Examination?

The official PSI examination has 30 scored questions. Passing is 70% (21 of 30 points) within 75 minutes (Candidate Information Bulletin 270, updated 3/25/2026).

How much does the NV C-1I Chilled-Water Piping 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-1I Chilled-Water Piping exam open book?

Yes. PSI lists this examination as open book. UPC 2018 and UMC 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.