New Mexico MM-2 Refrigeration Contractor EXAM
QUESTIONS AND CORRECT VERIFIED SOLUTIONS LATEST
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New Mexico MM-2 Refrigeration Contractor Exam – 250 MCQ Questions with Answers and
Rationales
Exam Coverage Overview (10 Key Points)
1. Exam Structure & Licensing – 100 questions, 75% passing score, open-book format
administered by PSI with 255 minutes time limit .
2. General Knowledge & Principles – Basic concepts, heat transfer, thermodynamics,
refrigeration cycle fundamentals .
3. Refrigeration Systems & Components – Compressors, condensers, evaporators,
metering devices, accumulators, receivers .
4. Refrigerants & Environmental Regulations – EPA Section 608 requirements, ASHRAE
Standard 34 classifications, recovery/recycling procedures .
5. Piping & Tubing – Refrigerant piping sizing, installation requirements, brazing/soldering
techniques, pressure testing .
6. Gas Sizing & Fuel Piping – Natural gas pipe sizing, BTU calculations, IFGC requirements,
appliance connections .
7. Safety & Testing – Pressure testing, leak detection, combustion air, venting
requirements, carbon monoxide safety .
8. Controls & Electrical – Thermostat wiring, low-voltage controls, motor controls,
contactors, relays, capacitors .
9. Heating Systems & Appliances – Furnaces, boilers, heat pumps, combustion analysis,
AFUE, heat exchangers .
10. Ductwork & Ventilation – Duct design, airflow measurement, static pressure, ventilation
requirements, exhaust systems .
1. What is the total number of questions on the New Mexico MM-2 Refrigeration Contractor
examination administered by PSI?
A) 75 questions
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B) 90 questions
C) 100 questions
D) 125 questions
Correct Answer: C
Rationale: The MM-2 Natural Gas Fitting and Refrigeration exam consists of 100 questions
covering general knowledge and principles, piping, gas sizing, safety and testing, appliances,
combustion air, chimneys, flues, vents, and heating systems .
2. What is the time limit allowed to complete the New Mexico MM-2 Refrigeration contractor
examination?
A) 200 minutes
B) 235 minutes
C) 245 minutes
D) 255 minutes
Correct Answer: D
Rationale: Candidates have 255 minutes (approximately 4 hours and 15 minutes) to complete
the MM-2 exam, which contains 100 questions. This allows sufficient time to reference the
open-book permitted materials .
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3. What is the minimum passing score required for the New Mexico MM-2 contractor
examination?
A) 65%
B) 70%
C) 75%
D) 80%
Correct Answer: C
Rationale: A score of 75% is required to pass the MM-2 exam. Candidates must correctly
answer at least 75 of the 100 questions to achieve a passing score. This 75% passing threshold
applies to all trade exams in New Mexico .
4. Which state agency is responsible for issuing the New Mexico MM-2 Refrigeration
contractor license?
A) New Mexico Department of Labor
B) New Mexico Construction Industries Division (CID)
C) New Mexico Environmental Protection Agency
D) New Mexico Board of Examiners for Contractors
Correct Answer: B
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Rationale: The New Mexico Construction Industries Division (CID), part of the Regulation and
Licensing Department, administers licensing under Title 14, including the MM-2 contractor
license. This is the governing body that issues all contractor licenses in New Mexico .
5. The New Mexico MM-2 Refrigeration contractor exam is which of the following?
A) Closed book
B) Open book with approved references
C) Computer adaptive
D) Oral examination
Correct Answer: B
Rationale: The New Mexico MM-2 contractor trade exam is open book, allowing candidates to
bring approved references that may be tabbed and highlighted. PSI administers the exam and
provides a list of approved reference materials .
6. What is the primary purpose of a condenser in a refrigeration system?
A) Absorb heat from indoor air
B) Increase refrigerant pressure
C) Reject heat to the outdoors
D) Meter refrigerant flow
Correct Answer: C