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100+ Free NV A-19 Pipelines and Conduits Practice Questions

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2026 Statistics

Key Facts: NV A-19 Pipelines and Conduits 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 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 A-19 Pipeline and Conduits Contractor Examination is the official NSCB/PSI open book exam: 60 questions, 70% (42 of 60 points), 2 hours, USD 95 (bulletin 291, updated 3/25/2026). Official delivery: English.

Sample NV A-19 Pipelines and Conduits Practice Questions

Try these sample questions to test your NV A-19 Pipelines and Conduits exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Under NFPA 30 (2018), a liquid is classified as a Class I flammable liquid when its closed-cup flash point is:
A.Below 100°F
B.At or above 100°F and below 140°F
C.At or above 140°F and below 200°F
D.At or above 200°F
Explanation: NFPA 30 classifies liquids by closed-cup flash point. Class I flammable liquids have a flash point below 100°F (37.8°C). Combustible liquids begin at 100°F and are split into Class II and Class III.
2Unless tested to ASME B31, NFPA 30 (2018) requires flammable- and combustible-liquid piping to be hydrostatically tested, before being covered or placed in use, to what percentage of the maximum anticipated system pressure?
A.100 percent
B.110 percent
C.125 percent
D.150 percent
Explanation: NFPA 30 Chapter 27 requires an initial hydrostatic test to 150 percent of the maximum anticipated pressure, or a pneumatic test to 110 percent, and never less than 5 psig at the highest point. The test must last long enough for a complete visual inspection of joints and connections, and not less than 10 minutes.
3Underground metallic piping that handles flammable or combustible liquids must be protected from external corrosion by which of the following methods?
A.Coating or wrapping the pipe and providing cathodic protection or using a listed corrosion-resistant material
B.Leaving bare steel in native soil so a patina can form
C.Painting the pipe with ordinary latex house paint after backfill
D.Relying only on the liquid inside the pipe to prevent exterior rust
Explanation: NFPA 30 requires underground metallic piping to be protected against external corrosion. Accepted methods include a bonded coating or wrap plus cathodic protection, or use of a listed corrosion-resistant material such as fiberglass or other listed nonmetallic piping. Bare steel in soil is not an acceptable corrosion-control method.
4When nonmetallic (plastic) gas pipe is installed underground, what locating aid is typically installed with the pipe so it can be found later?
A.A continuous electrically conductive tracer wire or other approved locating device
B.A single steel stake at each property line only
C.A paper as-built sketch left in the valve box
D.A magnetic collar placed only at the meter
Explanation: Plastic gas pipe is not electrically conductive, so a tracer wire or other approved locating device is installed along the pipe. The tracer lets later 811 locates and maintenance crews find the line without guesswork. Ends of the tracer must remain accessible at valves, risers, or test stations.
5Under the APWA Uniform Color Code used with Nevada 811 marks, which color identifies gas, oil, steam, or other gaseous materials?
A.Red
B.Blue
C.Orange
D.Yellow
Explanation: Yellow marks gas, oil, steam, petroleum, and other gaseous materials. Pipeline crews must treat yellow marks as a high-hazard locate and expose the facility by hand or vacuum excavation inside the tolerance zone.
6Per NFPA 30, joints in piping systems that handle Class I liquids and are located in concealed spaces within buildings shall be:
A.Welded
B.Threaded only, with any thread sealant
C.Solvent-cemented plastic couplings
D.Slip-fit friction joints
Explanation: NFPA 30 requires joints in Class I liquid piping located in concealed building spaces to be welded. A concealed leak of a flammable liquid cannot be readily found or controlled, so a permanent welded joint is required. Threaded, solvent-cemented, and friction joints are not acceptable in that location.
7When must NFPA 30 piping that will be buried be tightness-tested?
A.Only after the first year of service
B.Only if the authority having jurisdiction happens to stop by
C.After the paving crew has finished the wearing course
D.Before the piping is covered, enclosed, or placed in use
Explanation: NFPA 30 requires piping to be tested before it is covered, enclosed, or placed in use so every joint can be inspected. Covering the line first hides leaks and makes repair excavation necessary. Tanks are tested separately so vented tanks are not over-pressured by the piping test.
8ASME B31.8 location class for a gas pipeline is assigned primarily on the basis of:
A.Population density and building occupancy along the pipeline
B.The brand of pipe coating specified
C.The color of the warning tape
D.Whether the pipe is installed on Monday or Friday
Explanation: B31.8 location class (Class 1 through Class 4) is based on the number and type of buildings intended for human occupancy, and on similar occupancy features, in a defined zone along the pipeline. Higher occupancy produces a more conservative design factor, cover, and test requirement.
9A contractor elects to pneumatically test an NFPA 30 product line whose maximum anticipated pressure is 40 psi. What is the correct pneumatic test pressure and minimum hold time?
A.40 psi for 2 minutes
B.44 psi for 5 minutes
C.44 psi for at least 10 minutes, and not less than 5 psig at the highest point
D.60 psi for 24 hours
Explanation: NFPA 30 pneumatic testing is 110 percent of maximum anticipated pressure: 1.10 × 40 psi = 44 psi. The pressure may not be less than 5 psig at the highest point and must be held long enough for a complete visual inspection, and not less than 10 minutes. Pneumatic testing stores more energy than a hydrotest, so the code uses a lower multiplier than the 150 percent hydrostatic test.
10Under NFPA 30 (2018), a combustible liquid with a closed-cup flash point of 125°F is classified as:
A.Class IA
B.Class IB
C.Class II
D.Class IIIB
Explanation: Class II combustible liquids have a flash point at or above 100°F and below 140°F. Diesel fuel is a common field example. Class I liquids flash below 100°F; Class IIIB liquids flash at or above 200°F.

About the NV A-19 Pipelines and Conduits Exam

The Nevada A-19 Pipeline and Conduits Contractor Examination is the official Nevada State Contractors Board trade or management examination administered by PSI Services LLC. The official exam has 60 scored questions. Passing is 70% (42 of 60 points) in 2 hours. The examination is open book. Approved center references include NFPA 30 Flammable and Combustible Liquids 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 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. NFPA 30 Flammable and Combustible Liquids Code, 2018 (allowed in center)

Time Limit

2 hours

Passing Score

70% (42 of 60 points)

Exam Fee

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

NV A-19 Pipelines and Conduits Exam Content Outline

25%

Gas Piping

Gas pipeline installation (15 items)

25%

Water Piping

Water pipeline installation (15 items)

10%

Welding

Pipeline welding (6 items)

13%

Safety

Trenching and pipeline safety (8 items)

8%

Paving

Restoration paving (5 items)

13%

Excavation, Compaction and Grading

Trenching and backfill (8 items)

5%

Nevada One-Call

Nevada One-Call / 811 (3 items)

How to Pass the NV A-19 Pipelines and Conduits Exam

What You Need to Know

  • Passing score: 70% (42 of 60 points)
  • Assessment: Open Book computer-based multiple-choice. NFPA 30 Flammable and Combustible Liquids Code, 2018 (allowed in center)
  • Time limit: 2 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 A-19 Pipelines and Conduits Study Tips from Top Performers

1Distribute study time to the official bulletin 291 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 A-19 Pipeline and Conduits Contractor Examination?

The official PSI examination has 60 scored questions. Passing is 70% (42 of 60 points) within 2 hours (Candidate Information Bulletin 291, updated 3/25/2026).

How much does the NV A-19 Pipelines and Conduits 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 A-19 Pipelines and Conduits exam open book?

Yes. PSI lists this examination as open book. NFPA 30 Flammable and Combustible Liquids 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.