New Mexico Mechanical (MM-98) Contractor License

The Mechanical (MM-98) Contractor License allows you to do the following work:

  • Covers all works described in (MS-3) Septic Tanks & Sewer, (MS-6) Lawn Sprinklers, (MS-12) Fire Protection Systems, (MS-14) Dry Chemical Fire Protection, and MM-1 through MM-4:
    • (MS-3) Septic Tanks & Sewer:
      • Excavate
      • Trench
      • Backfill and grade as necessary
      • Controls and control wiring not to exceed 24 volts
      • Install or repair incidental plug-in-type electrical control panels
      • Install, repair, alter, service, or maintain:
        • Septic tanks
        • Private sewage disposal systems
        • Manholes and sewer lines (beginning at a connection to a public or private utility and ending at a point five feet beyond the outside wall of a building or structure)
    • (MS-6) Lawn Sprinklers:
      • Install, alter, service, repair, or maintain potable water sprinkler systems
      • Excavate
      • Trench
      • Backfill and grade
      • Backflow prevention devices incidental plug-in type electrical control panels
      • Controls and control wiring not to exceed 24 volts
    • (MS-12) Fire Protection Systems:
      • Tanks, controls, and control wiring up to 24 volts
      • Bid or contract for structural alterations, electrical wiring, etc.
      • Excavate and backfill and install piping from structure to off-site water supply adjacent to fire protection system property
      • Install, repair, alter, service, or maintain:
        • Water-based fire protection systems required pressure or storage tanks
    • (MS-14) Dry Chemical Fire Protection:
      • Contract or bid or for structural alterations, electrical wiring, etc.
      • Install
      • Service
      • Repair
      • Maintain
      • Alter
      • The previous activities can be done on:
        • Fire protection systems
        • Temperature sensing devices
        • Carbon dioxide (CO)
        • Clean agents
        • Solenoid or safety shut-off devices and other incidental controls
        • Pressurized storage tanks
        • Valves
        • Control wiring up to 24 volts
    • (MM-1) Plumbing:
      • Plumbing
      • Excavating
      • Trenching
      • Backfilling
      • Install, repair, alter, service, and maintain:
        • Plumbing and piping fixtures
        • Incidental concrete supports
        • Hot water heating systems not exceeding 30 p.s.i. or 400,000 b.t.u./hour input
        • Piping for fuel, oil, and gasoline
        • Piping and appurtenances for solar thermal energy systems
        • Potable water irrigation sprinkler systems
        • Swimming pools and spas
        • Includes pneumatic or electric controls and control wiring not greater than 24 volts
        • Septic tanks, manholes, and sewer lines
    • (MM-2) Natural Gas Fitting:
      • Install, alter, repair, service, and maintain natural gas piping and fittings
      • Install hot water heating systems not exceeding 30 p.s.i. or 400,000 b.t.u./hour input
      • Steam and hot water boilers
      • May connect water to existing valved outlets
      • Warm air heating systems, including chimney connections
      • Flues
      • Refractories
      • Fittings valves
      • Thermal insulation
      • Burners
      • Accessories and incidental piping
      • Warm air appliances and other listed gas appliances
      • Incidental controls and control wiring, pneumatic control systems
      • Includes all required excavating
      • Trenching and backfilling
      • May not install LP Gas systems
    • (MM-3) Heat, Vent, and Air Conditioning:
      • Install, alter, repair, service, and maintain natural gas piping and fittings
      • Install hot water heating systems not exceeding 30 p.s.i.
      • May connect water to existing valved outlets
      • Install controls
      • Bid and contract for structural alterations, electrical wiring, and other work incidental to this scope of work
      • Control wiring not to exceed 24 volts
      • Install, alter, repair, service, and maintain:
        • HVAC air handling and refrigeration equipment and piping
        • Coils
        • Fans
        • Condensing units
        • Self-contained packaged air conditioning or heating units
        • Evaporative cooling units
        • Solar air heating and cooled mechanical air handling
        • Ductwork and accessories
        • NMAC 9 ventilation applications
    • (MM-4) Heat, Cooling, and Process Pipe:
      • Install high pressure and process piping solar thermal energy systems of any temperature or pressure range conveying gas or fluids other than potable water
      • Install, alter, repair, service, and maintain:
        • Cooling and process piping
        • Hydronic heating
        • Piping and appurtenances for steam and hot water systems of any temperature or pressure range
        • Chilled water systems
        • Condensing water systems and other process piping systems
        • Air handling equipment
        • Pressure vessels
        • Boilers
        • Refrigeration water chillers
        • Cooling towers
        • Heat exchangers
        • Fuel oil tanks and fuel oil piping
        • Electric controls and control wiring not to exceed 24 volts
        • Water based fire protection sprinkler systems
        • Dry chemical fire protection systems

How to Get the Mechanical (MM-98) Contractor License in New Mexico?

  1. Satisfy the experience requirement:
    • At least four years of documented Mechanical (MM-98) experience
  2. Take and pass the following exams:
    • New Mexico Plumbing (MM-1) Contractor Trade Exam.
    • New Mexico Natural Gas Fitting (MM-2) Contractor Trade Exam.
    • New Mexico Heat, Vent and Air Conditioning (MM-3) Contractor Trade Exam.
    • New Mexico Heat, Cooling, and Process Pipe (MM-4) Contractor Trade Exam.
    • New Mexico Business and Law (PSI©)
  3. Submit a complete notarized package with the following documents and send it to PSI©:
    PSI©
    877-663-9267
    2820 Broadbent Pkwy NE, Suite E & F
    Albuquerque, NM 87106
  4. Once the application packet has been approved and eligibility cleared, the license will be issued via USPS to the home address provided. (Licenses are effective only for three years, and a Contractor License Renewal Form must be submitted prior to expiration during each cycle).

New Mexico Mechanical (MM-98) Contractor License Exam Prep Courses

  • Login credentials emailed upon enrollment

    Unlimited access (no time limits)

    Lecture videos

    Practice questions

    Key concepts

    Step-by-step solutions to math problems

    $525.00
    $525.00
  • Login credentials emailed upon enrollment

    Unlimited access (no time limits)

    Lecture videos

    Practice questions

    Key concepts

    Step-by-step solutions to math problems

    $340.00
    $340.00

New Mexico Mechanical (MM-98) Contractor License Exams

Below is all the information related to the trade and Business and Law exams, including the official reference lists.

New Mexico Plumbing (MM-1) Contractor Trade Exam

  • Testing Method: Computer-based testing
  • Testing Company: PSI©
  • Number of Questions: 100
  • Types of Questions: Multiple choice
  • Time Allowed: 250 Minutes
  • Minimum Passing Score: 75% (75 points)
  • Subjects Involved (No. of Questions):
    • Drainage Waste and Vents (25)
    • Water Supply Systems (10)
    • Backflow Prevention (9)
    • Storm Drainage Systems (6)
    • Plumbing Fixtures incl Water Heaters/Accessibility (10)
    • General Knowledge and General Regulations (15)
    • Interceptors and Traps (9)
    • Isometric Analysis (10)
    • Septic and Sewer (6)
  • PSI© Mechanical (MM-98) Official Content Outline

New Mexico Natural Gas Fitting (MM-2) Contractor Trade Exam

  • Testing Method: Computer-based testing
  • Testing Company: PSI©
  • Number of Questions: 100
  • Types of Questions: Multiple choice
  • Time Allowed: 255 Minutes
  • Minimum Passing Score: 75% (75 points)
  • Subjects Involved (No. of Questions):
    • General Knowledge and Principles (16)
    • Piping (19)
    • Gas Sizing (13)
    • Safety and Testing (8)
    • Appliances (15)
    • Combustion Air (9)
    • Chimneys, Flues, and Vents (10)
    • Heating Systems (10)
  • PSI© Natural Gas Fitting (MM-2) Official Content Outline

New Mexico Heat, Vent and Air Conditioning (MM-3) Contractor Trade Exam

  • Testing Method: Computer-based testing
  • Testing Company: PSI©
  • Number of Questions: 100
  • Types of Questions: Multiple choice
  • Time Allowed: 245 Minutes
  • Minimum Passing Score: 75% (75 points)
  • Subjects Involved (No. of Questions):
    • Motors, Controls, and Low Voltage Wiring (20)
    • Piping (10)
    • Heating and Cooling General Knowledge (20)
    • Heating and Cooling Equipment and Components (15)
    • Refrigerants and Refrigeration (15)
    • Duct Work, Ventilation, and Exhaust (20)
  • PSI© Heat, Vent and Air Conditioning (MM-3) Official Content Outline

New Mexico Heat, Cooling, and Process Pipe (MM-4) Contractor Trade Exam

  • Testing Method: Computer-based testing
  • Testing Company: PSI©
  • Number of Questions: 90
  • Types of Questions: Multiple choice
  • Time Allowed: 235 Minutes
  • Minimum Passing Score: 75% (68 points)
  • Subjects Involved (No. of Questions):
    • General Knowledge (29)
    • Steam and Hot Water Boiler Systems (7)
    • Process Piping and Systems (28)
    • Fire Suppression Systems (6)
    • Controls and Components (15)
    • Combustion Air and Venting (5)
  • PSI© Heat, Cooling, and Process Pipe (MM-4) Official Content Outline

New Mexico Mechanical (MM-98) Contractor Business and Law Examination

  • Testing Method: Computer-based testing
  • Testing Company: PSI©
  • Number of Questions: 50
  • Types of Questions: Multiple choice
  • Time Allowed: 130 Minutes
  • Minimum Passing Score: 75% (38 points)
  • Subjects Involved (No. of Questions):
    • Licensing Requirements (8)
    • Estimating and Bidding (5)
    • Business Organization and Financial Management (8)
    • Tax Laws (5)
    • Labor Laws (4)
    • Project Management and Lien Law (5)
    • Contracts (8)
    • Risk Management (4)
    • Environmental and Safety (3)
  • PSI© Business & Law Official Content Outline

New Mexico Mechanical (MM-98) Contractor Book Set

This set of books includes all required references for the Mechanical (MM-98) and Business and Law exams. Orders placed before 2 PM are shipped the same day via UPS and a tracking number is emailed before 3 PM.

  • NEW MEXICO MECHANICAL (MM-98) - BOOK SET WITHOUT TABS INCLUDES ALL BOOKS FOR TRADE AND BUSINESS EXAMS

    Sales price: $1,536.07
  • NEW MEXICO MECHANICAL (MM-98) - BOOK SET WITH TABS INCLUDES ALL BOOKS FOR TRADE AND BUSINESS EXAMS

    Sales price: $1,636.07

New Mexico Plumbing (MM-1) Contractor Exam Books

Books Allowed in Testing

Books Not Allowed in Testing

New Mexico Natural Gas Fitting (MM-2) Contractor Exam Books

Books Allowed in Testing

New Mexico Heat, Vent and Air Conditioning (MM-3) Contractor Exam Books

Books Allowed in Testing

New Mexico Heat, Cooling, and Process Pipe (MM-4) Contractor Exam Books

Books Allowed in Testing

Books Not Allowed in Testing

New Mexico Mechanical (MM-98) Business and Law Examination Books

Books Allowed in Testing