NEW MEXICO MM-2 NATURAL GAS FITTING CONTRACTOR
EXAM COMPLETE EXAM QUESTIONS AND VERIFIED
ANSWERS | 2026–2027 LATEST UPDATE | GUARANTEED
PASS | DETAILED RATIONALES | FULL STUDY GUIDE | EXAM
PREP | PRACTICE TEST | CERTIFICATION PREPARATION
1) According to New Mexico regulations, which license classification is specifically required for
installing, altering, and repairing natural gas piping and fittings?
A) MM-1 Plumbing License
B) MM-2 Natural Gas Fitting License
C) MM-3 HVAC License
D) MM-98 Combined Mechanical License
Correct Answer: B) MM-2 Natural Gas Fitting License
Rationale: The MM-2 Natural Gas Fitting Contractor license specifically authorizes the installation,
alteration, repair, and servicing of natural gas piping, fittings, and incidental controls . While an MM-
98 Combined Mechanical license includes MM-2 work, the MM-2 classification is the specific license
for natural gas fitting .
2) What is the total number of questions on the New Mexico MM-2 Natural Gas Fitting Contractor
exam?
A) 75 questions
B) 90 questions
C) 100 questions
D) 125 questions
Correct Answer: C) 100 questions
Rationale: The MM-2 Natural Gas Fitting Exam consists of 100 questions . Candidates must answer at
least 75% correctly to pass the exam, which is administered by PSI .
3) How much time is allocated to complete the New Mexico MM-2 Natural Gas Fitting Contractor
exam?
A) 200 minutes
B) 235 minutes
C) 245 minutes
D) 255 minutes
Correct Answer: D) 255 minutes
Rationale: Candidates have 255 minutes (approximately 4 hours and 15 minutes) to complete the
100-question MM-2 exam . The exam is open-book, allowing candidates to bring approved, tabbed,
and highlighted references .
,4) What is the minimum number of documented work experience hours required to qualify for a
New Mexico MM-2 Natural Gas Fitting Contractor license?
A) 4,000 hours
B) 6,000 hours
C) 8,000 hours
D) 10,000 hours
Correct Answer: C) 8,000 hours
Rationale: New Mexico requires 8,000 hours (approximately four years) of documented experience in
the trade to qualify for an MM-2 contractor license . Applicants must also pass the Business and Law
exam and become an approved Qualifying Party .
5) What is the required surety bond amount for New Mexico MM-2 Natural Gas Fitting
Contractors?
A) $5,000
B) $10,000
C) $15,000
D) $25,000
Correct Answer: B) $10,000
Rationale: New Mexico requires MM-2 contractors to obtain a $10,000 surety bond to protect
consumers and the state against financial losses from failure to comply with licensing laws or
contractual obligations .
6) Which of the following topics is NOT listed as a primary content area for the New Mexico MM-2
Natural Gas Fitting exam?
A) Piping and Gas Sizing
B) Combustion Air and Venting
C) Electrical Wiring and Controls
D) Chimneys, Flues, and Vents
Correct Answer: C) Electrical Wiring and Controls
Rationale: The MM-2 exam covers General Knowledge, Piping, Gas Sizing, Safety and Testing,
Appliances, Combustion Air, and Chimneys, Flues, and Vents . While incidental controls are within
scope, extensive electrical wiring is not a primary exam topic .
7) An MM-2 licensed contractor is performing work that includes excavating and backfilling for a
natural gas line. Is this activity within the scope of their license?
A) No, excavation requires a separate license
B) Yes, excavating and backfilling are included
C) Only if a plumber is also on-site
D) Only if the work is residential
, Correct Answer: B) Yes, excavating and backfilling are included
Rationale: The MM-2 license scope explicitly includes excavating, trenching, and backfilling necessary
for natural gas piping installation . This is part of the trade work required to complete gas line
installations.
8) What is the minimum burial depth required for polyethylene gas pipe installed under a
residential driveway in New Mexico?
A) 6 inches
B) 12 inches
C) 18 inches
D) 24 inches
Correct Answer: C) 18 inches
Rationale: Code requires a minimum of 18 inches burial depth for polyethylene gas pipe under
driveways to protect against mechanical damage from vehicle loads . This depth provides adequate
cover for the pipe to prevent crushing or puncturing.
9) What is the maximum allowable length for a flexible gas connector between a gas appliance and
a rigid gas pipe?
A) 12 inches
B) 24 inches
C) 36 inches
D) 48 inches
Correct Answer: B) 24 inches
Rationale: Codes limit flexible gas connectors to 24 inches to minimize pressure loss and reduce the
risk of physical damage or kinking . Longer flexible connectors are prohibited because they are more
vulnerable to damage and can create excessive pressure drop.
10) According to New Mexico code, what is the required clearance between a gas-fired water
heater and a combustible wall?
A) 3 inches
B) 6 inches
C) 12 inches
D) 18 inches
Correct Answer: B) 6 inches
Rationale: New Mexico Mechanical Code requires a minimum 6-inch clearance between gas-fired
water heaters and combustible walls to prevent heat transfer that could ignite nearby materials . This
clearance is essential for fire safety in residential installations.
EXAM COMPLETE EXAM QUESTIONS AND VERIFIED
ANSWERS | 2026–2027 LATEST UPDATE | GUARANTEED
PASS | DETAILED RATIONALES | FULL STUDY GUIDE | EXAM
PREP | PRACTICE TEST | CERTIFICATION PREPARATION
1) According to New Mexico regulations, which license classification is specifically required for
installing, altering, and repairing natural gas piping and fittings?
A) MM-1 Plumbing License
B) MM-2 Natural Gas Fitting License
C) MM-3 HVAC License
D) MM-98 Combined Mechanical License
Correct Answer: B) MM-2 Natural Gas Fitting License
Rationale: The MM-2 Natural Gas Fitting Contractor license specifically authorizes the installation,
alteration, repair, and servicing of natural gas piping, fittings, and incidental controls . While an MM-
98 Combined Mechanical license includes MM-2 work, the MM-2 classification is the specific license
for natural gas fitting .
2) What is the total number of questions on the New Mexico MM-2 Natural Gas Fitting Contractor
exam?
A) 75 questions
B) 90 questions
C) 100 questions
D) 125 questions
Correct Answer: C) 100 questions
Rationale: The MM-2 Natural Gas Fitting Exam consists of 100 questions . Candidates must answer at
least 75% correctly to pass the exam, which is administered by PSI .
3) How much time is allocated to complete the New Mexico MM-2 Natural Gas Fitting Contractor
exam?
A) 200 minutes
B) 235 minutes
C) 245 minutes
D) 255 minutes
Correct Answer: D) 255 minutes
Rationale: Candidates have 255 minutes (approximately 4 hours and 15 minutes) to complete the
100-question MM-2 exam . The exam is open-book, allowing candidates to bring approved, tabbed,
and highlighted references .
,4) What is the minimum number of documented work experience hours required to qualify for a
New Mexico MM-2 Natural Gas Fitting Contractor license?
A) 4,000 hours
B) 6,000 hours
C) 8,000 hours
D) 10,000 hours
Correct Answer: C) 8,000 hours
Rationale: New Mexico requires 8,000 hours (approximately four years) of documented experience in
the trade to qualify for an MM-2 contractor license . Applicants must also pass the Business and Law
exam and become an approved Qualifying Party .
5) What is the required surety bond amount for New Mexico MM-2 Natural Gas Fitting
Contractors?
A) $5,000
B) $10,000
C) $15,000
D) $25,000
Correct Answer: B) $10,000
Rationale: New Mexico requires MM-2 contractors to obtain a $10,000 surety bond to protect
consumers and the state against financial losses from failure to comply with licensing laws or
contractual obligations .
6) Which of the following topics is NOT listed as a primary content area for the New Mexico MM-2
Natural Gas Fitting exam?
A) Piping and Gas Sizing
B) Combustion Air and Venting
C) Electrical Wiring and Controls
D) Chimneys, Flues, and Vents
Correct Answer: C) Electrical Wiring and Controls
Rationale: The MM-2 exam covers General Knowledge, Piping, Gas Sizing, Safety and Testing,
Appliances, Combustion Air, and Chimneys, Flues, and Vents . While incidental controls are within
scope, extensive electrical wiring is not a primary exam topic .
7) An MM-2 licensed contractor is performing work that includes excavating and backfilling for a
natural gas line. Is this activity within the scope of their license?
A) No, excavation requires a separate license
B) Yes, excavating and backfilling are included
C) Only if a plumber is also on-site
D) Only if the work is residential
, Correct Answer: B) Yes, excavating and backfilling are included
Rationale: The MM-2 license scope explicitly includes excavating, trenching, and backfilling necessary
for natural gas piping installation . This is part of the trade work required to complete gas line
installations.
8) What is the minimum burial depth required for polyethylene gas pipe installed under a
residential driveway in New Mexico?
A) 6 inches
B) 12 inches
C) 18 inches
D) 24 inches
Correct Answer: C) 18 inches
Rationale: Code requires a minimum of 18 inches burial depth for polyethylene gas pipe under
driveways to protect against mechanical damage from vehicle loads . This depth provides adequate
cover for the pipe to prevent crushing or puncturing.
9) What is the maximum allowable length for a flexible gas connector between a gas appliance and
a rigid gas pipe?
A) 12 inches
B) 24 inches
C) 36 inches
D) 48 inches
Correct Answer: B) 24 inches
Rationale: Codes limit flexible gas connectors to 24 inches to minimize pressure loss and reduce the
risk of physical damage or kinking . Longer flexible connectors are prohibited because they are more
vulnerable to damage and can create excessive pressure drop.
10) According to New Mexico code, what is the required clearance between a gas-fired water
heater and a combustible wall?
A) 3 inches
B) 6 inches
C) 12 inches
D) 18 inches
Correct Answer: B) 6 inches
Rationale: New Mexico Mechanical Code requires a minimum 6-inch clearance between gas-fired
water heaters and combustible walls to prevent heat transfer that could ignite nearby materials . This
clearance is essential for fire safety in residential installations.
