100+ Free NM CID GS-25 Practice Questions

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2026 Statistics

Key Facts: NM CID GS-25 Exam

75%

Passing Score

PSI NM Contractor Bulletin 4/3/2026

50 Q

Official Exam Questions

PSI NM Contractor Bulletin 4/3/2026

155 min

Time Allowed

PSI NM Contractor Bulletin 4/3/2026

USD 68.88

PSI Exam Fee

PSI NM Contractor Bulletin 4/3/2026

NM CID GS-25 is a 50-question PSI swimming pools exam, 75% pass, 155 minutes, USD 68.88 (bulletin 4/3/2026).

Sample NM CID GS-25 Practice Questions

Try these sample questions to test your NM CID GS-25 exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1A pool site plan is drawn at 1/4 inch = 1 foot 0 inches. The water-surface length measures 8-1/4 inches on the drawing. What is the actual length?

A.66 feet 0 inches

B.16 feet 6 inches

C.24 feet 9 inches

D.33 feet 0 inches

Explanation: At 1/4 inch = 1 foot, each inch on the sheet equals 4 feet. 8.25 × 4 = 33.0 feet. Equivalently, 8.25 ÷ 0.25 = 33. Confirm the graphic scale on the sheet before measuring; many pool sheets mix architectural and engineering scales.

2A rectangular pool floor is 16 feet by 32 feet and 6 inches thick. How many cubic yards of concrete are required for the floor only, with no waste?

A.12.6 cubic yards

B.6.3 cubic yards

C.7.1 cubic yards

D.9.5 cubic yards

Explanation: Convert thickness to feet and divide by 27: 16 × 32 × (6/12) ÷ 27 = 256 ÷ 27 = 9.48 cubic yards, which rounds to 9.5 cubic yards. Waste, walls, and benches are separate adders. Always convert inches to feet before dividing by 27.

3A grading plan is drawn at 1/8 inch = 1 foot 0 inches. The pool excavation outline measures 4 inches by 2-1/2 inches and the cut is 6 feet deep. What is the bank excavation volume of that rectangle, with no slope allowance?

A.190 cubic yards

B.71 cubic yards

C.107 cubic yards

D.142 cubic yards

Explanation: At 1/8 inch = 1 foot, each inch equals 8 feet. The outline is 32 feet by 20 feet. Volume is 32 × 20 × 6 ÷ 27 = 3,840 ÷ 27 = 142.2 cubic yards, reported as 142 cubic yards. Sloped sides and working room are extra and must be added only after the net box is correct.

4A shotcrete takeoff shows 144 linear feet of 6-foot-high wall at 6 inches thick plus an 18-foot by 36-foot floor at 6 inches thick. Add 10 percent for waste and rebound. How many cubic yards should be ordered?

A.33.6 cubic yards

B.24.9 cubic yards

C.28.0 cubic yards

D.30.8 cubic yards

Explanation: Wall volume is 144 × 6 × (6/12) = 432 cubic feet, and floor volume is 18 × 36 × (6/12) = 324 cubic feet. Net is 756 ÷ 27 = 28.0 cubic yards. Adding 10 percent: 28.0 × 1.10 = 30.8 cubic yards. Compute net volume first; waste is a separate multiplier.

5Per NMAC 14.6.6, which work is inside the GS-25 Swimming Pools classification?

A.Installing the pool circulation pump, heater, and gas piping

B.Excavating the pool, placing reinforcing steel or mesh, and applying concrete and special coatings

C.Bonding the pool steel and installing underwater lighting circuits

D.Setting the skimmer piping, returns, and main-drain lines as plumbing work

Explanation: NMAC 14.6.6.9 lists GS-25 as swimming pools (non-plumbing, mechanical or electrical) and covers excavation, reinforcing steel or mesh, and concrete and special coatings. The classification shall not perform any scope authorized by a plumbing, mechanical, electrical, or LP-gas license. Pumps, heaters, gas, bonding, lighting, and circulation piping are outside GS-25.

6A 16-foot by 32-foot pool floor is reinforced with #4 bars at 12 inches on center each way, including the end bars. Using 0.668 pounds per foot for #4, what is the steel weight, with no lap or waste?

A.358 pounds

B.684 pounds

C.716 pounds

D.1,072 pounds

Explanation: Bars running the 32-foot direction: 16 ÷ 1 + 1 = 17 bars × 32 feet = 544 feet. Bars running the 16-foot direction: 32 ÷ 1 + 1 = 33 bars × 16 feet = 528 feet. Total length is 1,072 feet × 0.668 = 716 pounds, using the CRSI nominal #4 weight of 0.668 pounds per foot. Laps and chairs are extra.

7Before a pool excavation begins, what must the contractor do regarding underground utilities?

A.Have underground installations located and marked, and notify utility owners as required

B.Assume residential lots have no utilities inside the backyard fence

C.Rely on the homeowner's memory of where the gas and water lines run

D.Start the cut and stop only if a line is hit

Explanation: OSHA 29 CFR 1926.651(b) requires the estimated location of utility installations to be determined before opening an excavation, and utility owners to be contacted and advised of the proposed work. New Mexico one-call locating is the field method that satisfies that duty. Homeowner memory and backyard assumptions do not locate lines.

8For a simple-slope excavation 20 feet deep or less in Type C soil, what is the OSHA maximum allowable slope?

A.Vertical (90 degrees)

B.3/4 horizontal to 1 vertical (53 degrees)

C.1 horizontal to 1 vertical (45 degrees)

D.1-1/2 horizontal to 1 vertical (34 degrees)

Explanation: OSHA 1926 Subpart P Appendix B, Table B-1, sets Type C soil at 1-1/2:1 (34 degrees from horizontal) for excavations less than 20 feet deep. Type C is the least stable classified soil and includes many granular and submerged materials common around pool sites. Steeper tabulated slopes belong to Type B, Type A, or stable rock.

9A pool hole is 8 feet deep in Type C soil and will be sloped at the OSHA maximum simple slope. How far must the top of each sloped face set back from the bottom edge?

A.4 feet

B.6 feet

C.8 feet

D.12 feet

Explanation: Type C maximum slope is 1-1/2 horizontal to 1 vertical. Horizontal setback equals 1.5 × 8 feet = 12 feet on each side. That setback is measured from the toe of the slope at the bottom of the cut. Using a 1:1 or 3/4:1 factor under-cuts Type C and is not permitted by Appendix B.

10A 6-foot-deep pool excavation in Type B soil will be a simple slope at the OSHA maximum. What is the horizontal setback from the bottom edge to the top of the cut on each side?

A.3 feet

B.4 feet 6 inches

C.6 feet

D.9 feet

Explanation: Appendix B allows Type B simple slopes of 1:1 (45 degrees) for cuts 20 feet deep or less. Horizontal setback equals the vertical depth: 1 × 6 feet = 6 feet. Type B is more stable than Type C but is not permitted to use the steeper Type A 3/4:1 slope.

About the NM CID GS-25 Exam

The New Mexico CID GS-25 examination covers swimming pool construction excluding plumbing, mechanical, and electrical work. The official open-book PSI exam has 50 scored questions, a 75% passing standard (38 points), and 155 minutes allowed. Allowed references include NMAC 14.7.2 and 14.7.3 (2021), IBC 2021, IRC 2021, OSHA 29 CFR 1926, the Certified Pool-Spa Operators Handbook (2006), PCA Design and Control of Concrete Mixtures (17th, 2021), CRSI Placing Reinforcing Bars (9th), ACI Guide to Shotcrete (2016 or 2022), Pipe and Excavation Contracting (2011), and ISPSC 2021. NMAC 14.6.6 GS-25 authorizes excavation, reinforcing steel or mesh, concrete, and special coatings and does not authorize plumbing, mechanical, electrical, or LP-gas work. Two years of experience is required. PSI lists the fee at USD 68.88 (bulletin updated 4/3/2026). This English-language MCQ bank is a study aid, not an official PSI form.

Questions

50 scored questions

Time Limit

155 minutes

Passing Score

75% (38 of 50 points)

Exam Fee

USD 68.88 (PSI Services LLC (for New Mexico Construction Industries Division))

NM CID GS-25 Exam Content Outline

Plan Reading and Estimating

Plan reading and estimating (3 items)

18%

Sitework and Excavating

Sitework and excavating (9 items)

18%

Forming and Reinforcing

Forming and reinforcing (9 items)

16%

Concrete

Concrete (8 items)

16%

Shotcrete

Shotcrete (8 items)

16%

Pool Equipment, Including ADA

Pool equipment, including ADA (no plumbing or electric) (8 items)

10%

Safety

Safety, including CFR, pool and security fencing (5 items)

How to Pass the NM CID GS-25 Exam

What You Need to Know

Passing score: 75% (38 of 50 points)
Exam length: 50 questions
Time limit: 155 minutes
Exam fee: USD 68.88

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

NM CID GS-25 Study Tips from Top Performers

1Sitework, forming, concrete, and shotcrete are 34 of 50 official items. Study ISPSC 2021 with ACI shotcrete and PCA mixtures.

2This bank is an English-language MCQ study aid, not an official PSI form

Frequently Asked Questions

How many questions are on the NM GS-25 exam?

The official PSI examination has 50 scored questions. Passing is 75% (38 points) within 155 minutes (bulletin updated 4/3/2026).

100+ Free NM CID GS-25 Practice Questions

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Key Facts: NM CID GS-25 Exam

Sample NM CID GS-25 Practice Questions

About the NM CID GS-25 Exam

NM CID GS-25 Exam Content Outline

How to Pass the NM CID GS-25 Exam

What You Need to Know

Keys to Passing

NM CID GS-25 Study Tips from Top Performers

Frequently Asked Questions