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Maine (ME) Large Equipment Installation & Service
Technician Exam ACTUAL QUESTIONS AND
ANSWERS LATEST UPDATE THIS YEAR
Maine (ME) Large Equipment Installation & Service Technician Exam
Point-Form Exam Coverage (Based on Official 2024 CIB)
Based on the Maine Fuel Board's 2024 Content Outline, the exam covers :
• NFPA 54 - National Fuel Gas Code (20% - 10 questions): Piping systems, appliance connections,
gas pressure regulation, venting, clearances, and installation requirements for gas piping
systems over 500,000 BTUs.
• Use of Venting Tables (18% - 9 questions): Proper sizing of vents, category I, II, III, and IV
appliance venting, draft hoods, and chimney connections.
• Use of Piping Tables (14% - 7 questions): Sizing gas piping systems, pressure drop calculations,
equivalent lengths, and capacity tables for schedule 40 and CSST.
• Maine Fuel Board Laws & Rules (16% - 8 questions): Licensing requirements, scope of large
equipment authority, direct supervision, permit requirements, and board jurisdiction.
• Properties of Fuel Gases (6% - 3 questions): Specific gravity, BTU content, combustion air
requirements, and gas characteristics (natural gas vs. propane).
• NFPA 70 - National Electrical Code (6% - 3 questions): Electrical disconnects, bonding and
grounding of gas piping, appliance electrical requirements.
• Uniform Plumbing Code (4% - 2 questions): Cross-connection control, backflow prevention, and
fuel gas piping intersections with plumbing.
• NFPA 30A - Motor Fuel Dispensing Facilities (4% - 2 questions): Gas appliance installations in
repair garages and dispensing areas.
• ASME CSD-1 - Controls & Safety Devices (2% - 1 question): Boiler safety controls, limit switches,
and operating controls for automatically fired boilers.
• NFPA 90B - Warm Air Heating (2% - 1 question): Ductwork connections to gas appliances and air
distribution systems.
• NFPA 88A - Parking Structures (2% - 1 question): Appliance installation in enclosed parking
facilities.
• NFPA 211 - Chimneys & Vents (2% - 1 question): Solid fuel-burning appliance connections and
chimney liners.
• Maine Plumbing Law (2% - 1 question): Legal boundaries between fuel gas and plumbing scope.
• General Knowledge (2% - 1 question): Trade safety, tools, and best practices.
Question 1
A large commercial boiler rated at 750,000 BTU/h requires gas pipe sizing. According to NFPA 54, which
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code section governs the allowable pressure drop from the meter to the appliance?
A) NFPA 30A
B) NFPA 54 Chapter 6 (Pipe Sizing)
C) NFPA 70 Article 422
D) ASME CSD-1 Section CG-510
Answer: B
NFPA 54 Chapter 6 provides gas pipe sizing methods with allowable pressure drop of 0.3 inches w.c. for
systems under 2 psi.
Question 2
During a large equipment installation in Portland, ME, the municipality has a population of 68,000.
Which building code enforcement requirement applies?
A) MUBEC is voluntary for this municipality
B) MUBEC must be enforced because population exceeds 4,000
C) Only the stretch code applies regardless of population
D) No state code applies; local ordinance only
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Answer: B
Maine law requires MUBEC enforcement in any municipality with population of 4,000 or greater .
Question 3
A technician installs a propane-fired unit heater rated 600,000 BTU/h in a motor fuel dispensing facility.
Which NFPA code provides specific additional requirements for this location?
A) NFPA 54
B) NFPA 58
C) NFPA 30A
D) NFPA 70
Answer: C
NFPA 30A addresses gas appliance installations in motor fuel dispensing facilities and repair garages,
with requirements for ignition source height and ventilation .
Question 4
A Maine-licensed technician with a Large Equipment endorsement is asked to install indoor gas piping
for a 1,200,000 BTU/h boiler. What is the scope limitation under Maine Fuel Board rules?
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A) Cannot install any piping, only connect appliances
B) May install piping within NFPA 54 to appliances over 500,000 BTUs
C) Must hold a separate master plumber license for all gas piping
D) Limited to piping under 2 psi only
Answer: B
Large equipment technicians may install piping within NFPA 54 to appliances exceeding 500,000 BTUs
per appliance .
Question 5
During combustion analysis of a 1,500,000 BTU/h natural gas boiler, the technician measures 9.5% O2
and 120 ppm CO in the flue. Which action is most appropriate?
A) Increase primary air to reduce CO
B) Reduce excess air to lower O2 and improve efficiency
C) Check for flue gas recirculation
D) Immediately shut down the boiler
Answer: B
Maine (ME) Large Equipment Installation & Service
Technician Exam ACTUAL QUESTIONS AND
ANSWERS LATEST UPDATE THIS YEAR
Maine (ME) Large Equipment Installation & Service Technician Exam
Point-Form Exam Coverage (Based on Official 2024 CIB)
Based on the Maine Fuel Board's 2024 Content Outline, the exam covers :
• NFPA 54 - National Fuel Gas Code (20% - 10 questions): Piping systems, appliance connections,
gas pressure regulation, venting, clearances, and installation requirements for gas piping
systems over 500,000 BTUs.
• Use of Venting Tables (18% - 9 questions): Proper sizing of vents, category I, II, III, and IV
appliance venting, draft hoods, and chimney connections.
• Use of Piping Tables (14% - 7 questions): Sizing gas piping systems, pressure drop calculations,
equivalent lengths, and capacity tables for schedule 40 and CSST.
• Maine Fuel Board Laws & Rules (16% - 8 questions): Licensing requirements, scope of large
equipment authority, direct supervision, permit requirements, and board jurisdiction.
• Properties of Fuel Gases (6% - 3 questions): Specific gravity, BTU content, combustion air
requirements, and gas characteristics (natural gas vs. propane).
• NFPA 70 - National Electrical Code (6% - 3 questions): Electrical disconnects, bonding and
grounding of gas piping, appliance electrical requirements.
• Uniform Plumbing Code (4% - 2 questions): Cross-connection control, backflow prevention, and
fuel gas piping intersections with plumbing.
• NFPA 30A - Motor Fuel Dispensing Facilities (4% - 2 questions): Gas appliance installations in
repair garages and dispensing areas.
• ASME CSD-1 - Controls & Safety Devices (2% - 1 question): Boiler safety controls, limit switches,
and operating controls for automatically fired boilers.
• NFPA 90B - Warm Air Heating (2% - 1 question): Ductwork connections to gas appliances and air
distribution systems.
• NFPA 88A - Parking Structures (2% - 1 question): Appliance installation in enclosed parking
facilities.
• NFPA 211 - Chimneys & Vents (2% - 1 question): Solid fuel-burning appliance connections and
chimney liners.
• Maine Plumbing Law (2% - 1 question): Legal boundaries between fuel gas and plumbing scope.
• General Knowledge (2% - 1 question): Trade safety, tools, and best practices.
Question 1
A large commercial boiler rated at 750,000 BTU/h requires gas pipe sizing. According to NFPA 54, which
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code section governs the allowable pressure drop from the meter to the appliance?
A) NFPA 30A
B) NFPA 54 Chapter 6 (Pipe Sizing)
C) NFPA 70 Article 422
D) ASME CSD-1 Section CG-510
Answer: B
NFPA 54 Chapter 6 provides gas pipe sizing methods with allowable pressure drop of 0.3 inches w.c. for
systems under 2 psi.
Question 2
During a large equipment installation in Portland, ME, the municipality has a population of 68,000.
Which building code enforcement requirement applies?
A) MUBEC is voluntary for this municipality
B) MUBEC must be enforced because population exceeds 4,000
C) Only the stretch code applies regardless of population
D) No state code applies; local ordinance only
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Answer: B
Maine law requires MUBEC enforcement in any municipality with population of 4,000 or greater .
Question 3
A technician installs a propane-fired unit heater rated 600,000 BTU/h in a motor fuel dispensing facility.
Which NFPA code provides specific additional requirements for this location?
A) NFPA 54
B) NFPA 58
C) NFPA 30A
D) NFPA 70
Answer: C
NFPA 30A addresses gas appliance installations in motor fuel dispensing facilities and repair garages,
with requirements for ignition source height and ventilation .
Question 4
A Maine-licensed technician with a Large Equipment endorsement is asked to install indoor gas piping
for a 1,200,000 BTU/h boiler. What is the scope limitation under Maine Fuel Board rules?
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A) Cannot install any piping, only connect appliances
B) May install piping within NFPA 54 to appliances over 500,000 BTUs
C) Must hold a separate master plumber license for all gas piping
D) Limited to piping under 2 psi only
Answer: B
Large equipment technicians may install piping within NFPA 54 to appliances exceeding 500,000 BTUs
per appliance .
Question 5
During combustion analysis of a 1,500,000 BTU/h natural gas boiler, the technician measures 9.5% O2
and 120 ppm CO in the flue. Which action is most appropriate?
A) Increase primary air to reduce CO
B) Reduce excess air to lower O2 and improve efficiency
C) Check for flue gas recirculation
D) Immediately shut down the boiler
Answer: B
