MASSACHUSETTS JOURNEYMAN PIPEFITTER LICENSE EXAM– QUESTIONS AND ANSWERS | VERIFIED AND WELL
DETAILED ANSWERS | PLUS RATIONALES | DOWNLOAD AND PASS | LATEST EXAM UPDATE 2026/2027
Core Domains
Massachusetts Pipefitting Regulations (528 CMR)
ASME Boiler and Pressure Vessel Code
ASME B31 Piping Codes
Fuel Gas Code (NFPA CMR)
Combustion, Venting, and Ventilation
Pipe Joining, Materials, and Supports
Safety and Fire Protection (OSHA)
Licensing Laws and Ethics (M.G.L. c. 142)
Introduction
The Massachusetts Journeyman Pipefitter License Examination is designed to assess the competency of candidates
seeking licensure to perform pipefitting work within the Commonwealth. This examination evaluates a candidate's
mastery of foundational theory, applied professional knowledge, and strict adherence to regulatory standards. It
encompasses critical domains such as the Massachusetts Fuel Gas Code, ASME piping codes, and boiler safety
,regulations. The test utilizes multiple-choice and scenario-based questions to simulate real-world decision-making.
Emphasis is placed on code compliance, safe work practices, and the ethical responsibilities of a licensed
tradesperson, ensuring that only qualified individuals are granted the privilege to work in the field.
SECTION ONE: QUESTIONS 1–50
1. According to Massachusetts regulations, what is the minimum number of classroom instruction hours required
for an applicant to qualify for the Journeyman Pipefitter examination if applying on or after November 9, 2026?
A. 350 hours
B. 450 hours
C. 500 hours
D. 6,000 hours
🟢 Correct Answer: B. 450 hours
🔴 Explanation: Recent updates to the licensing requirements (528 CMR 11.00) mandate that applicants applying on
or after November 9, 2026, must complete 450 hours of approved classroom instruction, an increase from the prior
350-hour requirement .
,2. When installing a residential natural gas service line in Massachusetts, the minimum size from the street to the
building is typically:
A. 1/2 inch
B. 3/4 inch
C. 1 inch
D. 1-1/4 inch
🟢 Correct Answer: B. 3/4 inch
🔴 Explanation: Massachusetts Code (248 CMR 4.00) specifies that the minimum size for a single-family residential
gas service line is 3/4 inch to ensure adequate volume for typical appliances like furnaces and water heaters .
3. Which ASME code provides rules for piping typically found in industrial, institutional, commercial buildings,
and multi-unit residences?
A. ASME B31.1
B. ASME B31.3
C. ASME B31.9
D. ASME Section IV
🟢 Correct Answer: C. ASME B31.9
, 🔴 Explanation: ASME B31.9, Building Services Piping, specifically covers piping systems in industrial, institutional,
commercial, and public buildings as well as multi-unit residences .
4. What is the maximum allowable length for an unshielded flexible gas appliance connector used on a
residential gas range in Massachusetts?
A. 3 feet
B. 4 feet
C. 6 feet
D. 8 feet
🟢 Correct Answer: C. 6 feet
🔴 Explanation: The Massachusetts Fuel Gas Code limits the length of unshielded flexible gas connectors to a
maximum of 6 feet. Longer connections require an approved flexible gas piping system with proper bonding .
5. A pipefitter is installing gas piping in a crawlspace. What is the minimum required support interval for 1/2-inch
black iron pipe?
A. Every 4 feet
B. Every 6 feet
C. Every 8 feet
D. Every 10 feet
DETAILED ANSWERS | PLUS RATIONALES | DOWNLOAD AND PASS | LATEST EXAM UPDATE 2026/2027
Core Domains
Massachusetts Pipefitting Regulations (528 CMR)
ASME Boiler and Pressure Vessel Code
ASME B31 Piping Codes
Fuel Gas Code (NFPA CMR)
Combustion, Venting, and Ventilation
Pipe Joining, Materials, and Supports
Safety and Fire Protection (OSHA)
Licensing Laws and Ethics (M.G.L. c. 142)
Introduction
The Massachusetts Journeyman Pipefitter License Examination is designed to assess the competency of candidates
seeking licensure to perform pipefitting work within the Commonwealth. This examination evaluates a candidate's
mastery of foundational theory, applied professional knowledge, and strict adherence to regulatory standards. It
encompasses critical domains such as the Massachusetts Fuel Gas Code, ASME piping codes, and boiler safety
,regulations. The test utilizes multiple-choice and scenario-based questions to simulate real-world decision-making.
Emphasis is placed on code compliance, safe work practices, and the ethical responsibilities of a licensed
tradesperson, ensuring that only qualified individuals are granted the privilege to work in the field.
SECTION ONE: QUESTIONS 1–50
1. According to Massachusetts regulations, what is the minimum number of classroom instruction hours required
for an applicant to qualify for the Journeyman Pipefitter examination if applying on or after November 9, 2026?
A. 350 hours
B. 450 hours
C. 500 hours
D. 6,000 hours
🟢 Correct Answer: B. 450 hours
🔴 Explanation: Recent updates to the licensing requirements (528 CMR 11.00) mandate that applicants applying on
or after November 9, 2026, must complete 450 hours of approved classroom instruction, an increase from the prior
350-hour requirement .
,2. When installing a residential natural gas service line in Massachusetts, the minimum size from the street to the
building is typically:
A. 1/2 inch
B. 3/4 inch
C. 1 inch
D. 1-1/4 inch
🟢 Correct Answer: B. 3/4 inch
🔴 Explanation: Massachusetts Code (248 CMR 4.00) specifies that the minimum size for a single-family residential
gas service line is 3/4 inch to ensure adequate volume for typical appliances like furnaces and water heaters .
3. Which ASME code provides rules for piping typically found in industrial, institutional, commercial buildings,
and multi-unit residences?
A. ASME B31.1
B. ASME B31.3
C. ASME B31.9
D. ASME Section IV
🟢 Correct Answer: C. ASME B31.9
, 🔴 Explanation: ASME B31.9, Building Services Piping, specifically covers piping systems in industrial, institutional,
commercial, and public buildings as well as multi-unit residences .
4. What is the maximum allowable length for an unshielded flexible gas appliance connector used on a
residential gas range in Massachusetts?
A. 3 feet
B. 4 feet
C. 6 feet
D. 8 feet
🟢 Correct Answer: C. 6 feet
🔴 Explanation: The Massachusetts Fuel Gas Code limits the length of unshielded flexible gas connectors to a
maximum of 6 feet. Longer connections require an approved flexible gas piping system with proper bonding .
5. A pipefitter is installing gas piping in a crawlspace. What is the minimum required support interval for 1/2-inch
black iron pipe?
A. Every 4 feet
B. Every 6 feet
C. Every 8 feet
D. Every 10 feet
