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100+ Free NM CID MM-4 Practice Questions

Prepare for the New Mexico CID MM-4 Heat, Cooling and Process Pipe Examination exam with instant access — no signup required.

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2026 Statistics

Key Facts: NM CID MM-4 Exam

75%

Passing Score

PSI NM Contractor Bulletin 4/3/2026

90 Q

Official Exam Questions

PSI NM Contractor Bulletin 4/3/2026

235 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 MM-4 is a 90-question PSI heat, cooling, and process pipe exam, 75% pass, 235 minutes, USD 68.88 (bulletin 4/3/2026).

Sample NM CID MM-4 Practice Questions

Try these sample questions to test your NM CID MM-4 exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1How many years of experience does 14.6.6.11 NMAC require for the MM-4 heating, cooling, and process piping classification?
A.Two years
B.Three years
C.Four years
D.Six years
Explanation: 14.6.6.11 NMAC states that MM-4 heating, cooling, and process piping requires four years’ experience. That is the same experience floor as MM-1, MM-2, MM-3, and MM-98. Two-year specialty licenses such as MS-3 and MS-6 are a different classification series.
2Which work is inside the MM-4 scope in 14.6.6.11 NMAC?
A.Potable-water plumbing fixtures and building drains
B.Steam and hot-water piping of any temperature or pressure, chilled water, condensing water, and process piping
C.Natural-gas fitting as a stand-alone trade, including LP-gas systems
D.Line-voltage motor wiring above 24 volts
Explanation: 14.6.6.11 NMAC authorizes MM-4 to install, alter, repair, service, and maintain hydronic heating, cooling, and process piping, including steam and hot water of any temperature or pressure, chilled water, condensing water, and other process piping. Potable plumbing is MM-1, natural-gas fitting is MM-2, and control wiring is limited to 24 volts.
3Which official PSI MM-4 examination description matches bulletin 865 updated 4/3/2026?
A.90 scored questions, 75 percent (68 points), 235 minutes, USD 68.88, open-book CBT, English
B.50 scored questions, 70 percent, 120 minutes, USD 50, closed-book paper
C.100 scored questions, 80 percent, 4 hours, USD 100, Spanish only
D.75 scored questions, 65 percent, 180 minutes, no fee, oral exam
Explanation: PSI contractor bulletin 865, updated 4/3/2026, lists the MM-4 Heat, Cooling and Process Pipe examination as 90 scored questions, a 75 percent passing standard (68 points), 235 minutes, and USD 68.88. It is a computer-based open-book examination administered in English.
4Which reference is listed as not allowed in the PSI MM-4 exam center?
A.UMC 2021
B.NMAC 14.9.4 (2005) New Mexico Boiler Rules
C.NFPA 13 (2007)
D.NFPA 31 and Low Pressure Boilers
Explanation: The PSI MM-4 allowed-reference list includes NMAC 14.9.2 (2015), Modern Refrigeration and Air Conditioning 19th or 20th edition, UMC 2021, NMAC 14.9.4 (2005), NFPA 13 (2007), NFPA 17 (2009), IPT’s Pipe Trades Handbook 2016, and preprinted pressure-enthalpy charts. NMAC 14.8.2, UPC 2021, Low Pressure Boilers, and NFPA 31 are not allowed in the center.
5Which model code does 14.9.2 NMAC adopt, as amended, as the technical base of the New Mexico Mechanical Code?
A.2021 International Mechanical Code
B.2021 Uniform Mechanical Code
C.2021 Uniform Plumbing Code
D.2018 International Fuel Gas Code
Explanation: 14.9.2.8 NMAC adopts the 2021 Uniform Mechanical Code by reference, as amended by 14.9.2 NMAC, and numbers its provisions to correspond with the 2021 UMC. New Mexico is not an IMC mechanical-code state. The UPC is the plumbing model under 14.8.2 NMAC, which is not an MM-4 exam-center book.
6Under 14.9.2.10 NMAC, who is the authority having jurisdiction for the New Mexico Mechanical Code as the statewide minimum?
A.The serving gas utility
B.IAPMO
C.The CID and the mechanical-plumbing trade bureau chief
D.The local fire marshal only
Explanation: 14.9.2.10 NMAC replaces the UMC definition of authority having jurisdiction. The AHJ is the Construction Industries Division and the mechanical-plumbing trade bureau chief for adoption, interpretation, and enforcement of the state-adopted mechanical code as the statewide minimum.
7Which UMC chapter, adopted without a New Mexico text change in 14.9.2.22 NMAC, governs process piping?
A.Chapter 4, Ventilation Air
B.Chapter 6, Duct Systems
C.Chapter 13, Fuel Gas Piping
D.Chapter 14, Process Piping
Explanation: 14.9.2.22 NMAC tells the contractor to see UMC Chapter 14, Process Piping, with no state amendment. Process piping that conveys manufacturing or process fluids, as opposed to potable water or comfort hydronics, is that chapter. MM-4’s process-piping scope tracks Chapter 14 plus Chapter 12 hydronics.
8Which UMC chapter, adopted with only the 1205.2 test amendment in 14.9.2.20 NMAC, governs hydronic piping?
A.Chapter 11, Refrigeration
B.Chapter 12, Hydronics
C.Chapter 15, Solar Energy Systems
D.Chapter 8, Chimneys and Vents
Explanation: 14.9.2.20 NMAC adopts UMC Chapter 12, Hydronics, except it replaces the first sentence of 1205.2 with a hydrostatic or air test of not less than 1.5 times operating pressure. Materials, isolation, expansion control, and makeup water for closed hydronic loops live in Chapter 12.
9How does 14.9.2.11 NMAC change UMC 305.5 drainage-pan coverage?
A.It deletes drainage pans entirely
B.It applies the pan rule only to electric water heaters
C.It adds hot-water-heating boilers after each use of the term water heater
D.It requires a pan only when the boiler is outdoors
Explanation: 14.9.2.11 NMAC keeps UMC 305.5 except that after each term “water heater” it adds “or hot-water-heating boiler.” An MM-4 installer must provide the same overflow pan protection for a leaking hot-water heating boiler that a plumber provides for a water heater in a location that can damage the building. The pan still needs a drain to an approved point of disposal.
10A closed hydronic loop will operate at 40 psi. What minimum pressure test does 14.9.2.20 NMAC require in place of the first sentence of UMC 1205.2?
A.A hydrostatic or air test of not less than 60 psi
B.A 10 psi air test for 15 minutes
C.Operating pressure only, with no multiplier
D.A 200 psi hydrostatic test on every residential loop
Explanation: 14.9.2.20 NMAC substitutes that system piping shall be tested with a hydrostatic pressure or an air test of not less than 1.5 times operating pressure. 1.5 × 40 psi = 60 psi. New Mexico expressly allows air or water for that hydronic test.

About the NM CID MM-4 Exam

The New Mexico CID MM-4 examination covers heat, cooling, and process piping. The official open-book PSI exam has 90 scored questions, a 75% passing standard (68 points), and 235 minutes allowed. Allowed references include NMAC 14.9.2 (2015), Modern Refrigeration and Air Conditioning (19th or 20th edition), UMC 2021, NMAC 14.9.4 (2005), NFPA 13 (2007), NFPA 17 (2009), IPT's Pipe Trades Handbook (2016), and preprinted pressure-enthalpy charts. NMAC 14.8.2, UPC 2021, Low Pressure Boilers, and NFPA 31 are listed as not allowed in the exam center. NMAC 14.6.6 MM-4 requires four years of experience and covers hydronic heating and cooling, steam and hot-water systems of any temperature or pressure, process piping, boilers, chillers, cooling towers, fuel-oil tanks and piping, 24-volt controls, solar thermal process systems, water-based sprinklers, and dry-chemical fire protection. 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

90 scored questions

Time Limit

235 minutes

Passing Score

75% (68 of 90 points)

Exam Fee

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

NM CID MM-4 Exam Content Outline

32%

General Knowledge

General knowledge (29 items)

8%

Steam and Hot Water Boiler Systems

Steam and hot water boiler systems (7 items)

31%

Process Piping and Systems

Process piping and systems (28 items)

7%

Fire Suppression Systems

Fire suppression systems (6 items)

17%

Controls and Components

Controls and components (15 items)

6%

Combustion Air and Venting

Combustion air and venting (5 items)

How to Pass the NM CID MM-4 Exam

What You Need to Know

  • Passing score: 75% (68 of 90 points)
  • Exam length: 90 questions
  • Time limit: 235 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 MM-4 Study Tips from Top Performers

1General knowledge and process piping are 57 of 90 official items. Study UMC 2021 with NMAC 14.9.2 and 14.9.4.
2This bank is an English-language MCQ study aid, not an official PSI form

Frequently Asked Questions

How many questions are on the NM MM-4 exam?

The official PSI examination has 90 scored questions. Passing is 75% (68 points) within 235 minutes (bulletin updated 4/3/2026).