MAINE GAS EXAM PRACTICE ADVANCED
2026|2027 QUESTIONS AND ANSWERS
WITH COMPLETE A+ SOLUTIONS 100%
CORRECT!!!
NFPA 54 7.1.6.1
What is the minimum melting point for materials used for brazing joints on a gas pipe? - Correct
Answer -1000 degrees F
NFPA 54 3.3.6.8
Which of the following materials is approved for use as combustion air ducts? - Correct Answer -
Galvanized Steel
NFPA 54 9.3.8.1
What is the MINIMUM burial depth underground for gas lines that are installed in an area
where external forces could damage the pipe? - Correct Answer -18"
NFPA 54 7.1.2.1(a)
,What is the required distance between the upper edge of a cleanout and the lower edge of the
lowest inlet to a masonry chimney? - Correct Answer -6"
NFPA 54 12.6.7
A residential-type or low-heat appliance chimney shall terminate what MINIMUM distance
above the highest point of the roof where they pass through? - Correct Answer -3 Feet
NFPA 54 12.6.2.1
What is the MINIMUM length of the unthreaded portion of a gas piping outlet that extends
beyond the surface of a patio? - Correct Answer -2"
NFPA 54 7.7.1.5
A large house is being built with one boiler 34 feet away from the meter that uses natural gas;
all other appliances are electric. What size CSST stainless steel tubing should be installed to
supply 220 cubic feet of natural gas per hour with an inlet pressure less than 2psi, pressure drop
of 0.5 in w.c. and a specific gravity of 0.60? - Correct Answer -37
What is the MINIMUM clearance that shall be required for the exhaust duct of a Type 2 clothes
dryer from combustible materials? - Correct Answer -6"
, NFPA 54 10.4.5.4
Given: There is a bakery with with two large ovens back to back installed using a combined total
of 1225 cubic feet of gas per hour and located 61 feet from the natural gas supply meter. The
bakery is supplied with natural gas with a specific gravity of 0.60 and a pressure drop of 0.3 in.
w.c. and an inlet pressure of less than 2 psi.
What size steel pipe is needed to supply the ovens with gas? - Correct Answer -2-1/2 "
What is the MINIMUM clearance for a listed duct furnace from adjacent walls, ceilings and
floors made of combustible materials? - Correct Answer -6"
NFPA 54 10.10.1
What is the MAXIMUM length of a 10" horizontal vent connector? - Correct Answer -15 Feet -
10" x 18"/12"
NFPA 54 13.2.2.2
What is the atmospheric pressure (psia) of air on the surface of earth at sea level? - Correct
Answer -14.7lbs
2026|2027 QUESTIONS AND ANSWERS
WITH COMPLETE A+ SOLUTIONS 100%
CORRECT!!!
NFPA 54 7.1.6.1
What is the minimum melting point for materials used for brazing joints on a gas pipe? - Correct
Answer -1000 degrees F
NFPA 54 3.3.6.8
Which of the following materials is approved for use as combustion air ducts? - Correct Answer -
Galvanized Steel
NFPA 54 9.3.8.1
What is the MINIMUM burial depth underground for gas lines that are installed in an area
where external forces could damage the pipe? - Correct Answer -18"
NFPA 54 7.1.2.1(a)
,What is the required distance between the upper edge of a cleanout and the lower edge of the
lowest inlet to a masonry chimney? - Correct Answer -6"
NFPA 54 12.6.7
A residential-type or low-heat appliance chimney shall terminate what MINIMUM distance
above the highest point of the roof where they pass through? - Correct Answer -3 Feet
NFPA 54 12.6.2.1
What is the MINIMUM length of the unthreaded portion of a gas piping outlet that extends
beyond the surface of a patio? - Correct Answer -2"
NFPA 54 7.7.1.5
A large house is being built with one boiler 34 feet away from the meter that uses natural gas;
all other appliances are electric. What size CSST stainless steel tubing should be installed to
supply 220 cubic feet of natural gas per hour with an inlet pressure less than 2psi, pressure drop
of 0.5 in w.c. and a specific gravity of 0.60? - Correct Answer -37
What is the MINIMUM clearance that shall be required for the exhaust duct of a Type 2 clothes
dryer from combustible materials? - Correct Answer -6"
, NFPA 54 10.4.5.4
Given: There is a bakery with with two large ovens back to back installed using a combined total
of 1225 cubic feet of gas per hour and located 61 feet from the natural gas supply meter. The
bakery is supplied with natural gas with a specific gravity of 0.60 and a pressure drop of 0.3 in.
w.c. and an inlet pressure of less than 2 psi.
What size steel pipe is needed to supply the ovens with gas? - Correct Answer -2-1/2 "
What is the MINIMUM clearance for a listed duct furnace from adjacent walls, ceilings and
floors made of combustible materials? - Correct Answer -6"
NFPA 54 10.10.1
What is the MAXIMUM length of a 10" horizontal vent connector? - Correct Answer -15 Feet -
10" x 18"/12"
NFPA 54 13.2.2.2
What is the atmospheric pressure (psia) of air on the surface of earth at sea level? - Correct
Answer -14.7lbs
