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100+ Free NV A General Engineering Practice Questions

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2026 Statistics

Key Facts: NV A General Engineering Exam

100 Q

Official Exam Questions

PSI Nevada Contractor CIB updated 3/25/2026

70%

Passing Score

PSI Nevada Contractor CIB updated 3/25/2026

3 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 General Engineering Contractor Examination is the official NSCB/PSI open book exam: 100 questions, 70% (70 of 100 points), 3 hours, USD 95 (bulletin 291, updated 3/25/2026). Official delivery: English and Spanish.

Sample NV A General Engineering Practice Questions

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

1Per NDEP WTS-22, what is the minimum septic-tank capacity for an individual sewage disposal system?

A.500 gallons

B.750 gallons

C.1,000 gallons

D.1,500 gallons

Explanation: WTS-22 requires the tank to be 1,000 gallons minimum, then sized from design flow. Flows up to 1,500 gallons per day use tank volume equal to flow times 1.5. Roof, footing, garage, and process water must stay out of the tank.

2Per NDEP WTS-22, what is the minimum horizontal separation from a septic tank to a water-supply well?

A.50 feet

B.100 feet

C.150 feet

D.200 feet

Explanation: WTS-22 sets septic-tank setbacks of 8 feet to buildings, 10 feet to property lines and water-supply lines, 100 feet to lakes or streams, and 200 feet to water-supply wells. Absorption-trench well setbacks are shorter (100 feet, or 150 feet if the well is unsealed in the first 50 feet), so do not mix the two tables.

3Using the commonly applied Ten States / Recommended Standards self-cleansing criterion, what is the minimum design slope of an 8-inch gravity sanitary sewer?

A.0.20 percent

B.0.28 percent

C.0.40 percent

D.1.00 percent

Explanation: Recommended Standards for Wastewater Facilities (Ten States) size public gravity sewers for about 2 feet per second when flowing full. For 8-inch pipe that slope is 0.40 feet per 100 feet (0.40 percent). Local agencies may require a steeper grade; never flatten an 8-inch main below the approved profile.

4A commercial occupancy is assigned 1,200 gallons per day of domestic sewage. Using the NDEP WTS-22 formula for flows up to 1,500 gallons per day, what septic-tank capacity is required?

A.1,200 gallons

B.1,500 gallons

C.1,800 gallons

D.2,025 gallons

Explanation: WTS-22 sizes tanks at Flow × 1.5 when waste flow is 1,500 gallons per day or less, and not less than 1,000 gallons. 1,200 × 1.5 = 1,800 gallons. The over-1,500 formula (Flow × 0.75 + 1,125) is not used at this flow.

5Unless an approved special crossing is detailed, what is the standard minimum horizontal separation between a potable water main and a sanitary sewer?

A.5 feet

B.10 feet

C.18 feet

D.25 feet

Explanation: Ten States Standards and most water-utility specifications keep potable mains at least 10 feet horizontally from sewers, measured edge to edge. Where that offset cannot be met, the water main is usually placed above the sewer with at least 18 inches of vertical clearance and extra joint protection. Confirm the approved drawings before narrowing the corridor.

6Where a potable water main must cross a sanitary sewer, the water main is typically required to have at least how much vertical clearance above the sewer?

A.6 inches

B.12 inches

C.18 inches

D.36 inches

Explanation: The common crossing rule is 18 inches of clear vertical separation, with the water main above the sewer and joints located as far as possible from the crossing. Some agencies also require a full stick of water pipe centered on the sewer or a casing. 18 inches is the figure to tab; local details may be stricter.

7Thrust blocks or other approved restraint are required on a pressure water main at which locations?

A.Only at fire hydrants

B.Only on pipe larger than 12 inches

C.At bends, tees, reducers, dead ends, and other points where flow changes direction or stops

D.Only where the main is installed above grade

Explanation: Unbalanced hydrostatic force acts wherever the pipeline changes direction, changes diameter, or ends. DIPRA and AWWA installation practice therefore require concrete thrust blocks, restrained joints, or tie-rods at bends, tees, reducers, valves used as dead ends, and hydrant branches. Straight runs with fully restrained joints still need design review at fittings.

8Under AWWA C600 practice commonly specified on Nevada water mains, a new ductile-iron pressure line is hydrostatically tested at about 1.5 times working pressure, and not less than which pressure and duration?

A.100 psi for 30 minutes

B.125 psi for 1 hour

C.150 psi for 2 hours

D.250 psi for 4 hours

Explanation: AWWA C600 hydrostatic tests are run at 1.5 times the working pressure at the test point, and most municipal specifications also set a 150 psi floor held for 2 hours. Makeup water is measured against the allowable leakage formula. Do not begin the test until thrust restraint and backfill over the pipe are in place.

9Unless the drawings or frost depth require more cover, DIPRA installation practice for buried ductile-iron water mains commonly uses a minimum cover of about how much?

A.12 inches

B.18 inches

C.24 inches

D.36 inches

Explanation: The DIPRA Installation Guide and most utility standards bury potable mains about 36 inches to the top of pipe for traffic and frost protection. Shallower cover needs an engineered detail (insulation, casing, or concrete cap). Always follow the approved profile in rock or under pavement.

10After a new potable water main passes its pressure test, which AWWA standard governs disinfection before the line is placed in service?

A.AWWA C105 polyethylene encasement

B.AWWA C600 installation of ductile-iron mains

C.AWWA C651 disinfection of water mains

D.AWWA C900 PVC pressure pipe

Explanation: AWWA C651 covers flushing, chlorination (tablet, continuous-feed, or slug), contact time, residual sampling, and bacteriological clearance. A common continuous-feed method doses about 25 mg/L chlorine for 24 hours with a residual of at least 10 mg/L before final flush. C600 is the install/test standard, not the disinfection standard.

About the NV A General Engineering Exam

The Nevada A General Engineering Contractor Examination is the official Nevada State Contractors Board trade or management examination administered by PSI Services LLC. The official exam has 100 scored questions. Passing is 70% (70 of 100 points) in 3 hours. The examination is open book. 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. PSI also offers this examination in Spanish; this bank is an English-language MCQ study adaptation, not an official translation. It does not replace required trade experience, board approval, fingerprints, bonding, or the official examination.

Assessment

Open Book computer-based multiple-choice. See the current PSI Nevada contractor bulletin for allowed and closed-book references.

Time Limit

3 hours

Passing Score

70% (70 of 100 points)

Exam Fee

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

NV A General Engineering Exam Content Outline

4%

Sewers

Sewer and wastewater piping (4 items)

11%

Water and Piping

Water supply and piping (11 items)

12%

Gas and Liquid Fuel Piping

Gas and liquid-fuel transmission piping (12 items)

12%

Paving

Asphalt and paving procedures (12 items)

12%

Excavation, Compaction and Grading

Earthwork, compaction, and grading (12 items)

7%

Safety

OSHA 29 CFR 1926 safety (7 items)

6%

Steel

Structural steel and erection (6 items)

4%

Piles

Piles and deep foundations (4 items)

14%

Concrete

Concrete materials, placement, and reinforcement (14 items)

3%

Traffic Control

Work-zone traffic control (3 items)

6%

Welding

Welding procedures and inspection (6 items)

3%

Nevada One-Call

Nevada One-Call / 811 (3 items)

6%

Electrical Transmission Lines

Overhead electrical transmission (6 items)

How to Pass the NV A General Engineering Exam

What You Need to Know

Passing score: 70% (70 of 100 points)
Assessment: Open Book computer-based multiple-choice. See the current PSI Nevada contractor bulletin for allowed and closed-book references.
Time limit: 3 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 General Engineering 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 General Engineering Contractor Examination?

The official PSI examination has 100 scored questions. Passing is 70% (70 of 100 points) within 3 hours (Candidate Information Bulletin 291, updated 3/25/2026).

How much does the NV A General Engineering 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 General Engineering exam open book?

Yes. PSI lists this examination as open book. Bring only the bulletin-listed references with permanent tabs; temporary tabs are prohibited.

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.