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MAINE GAS EXAM - WITH CODES
2026 QUESTIONS AND ANSWERS|
ACE YOUR GRADES.
1. A 127 foot long gas line is being installed in metallic pipe. The
system is undiluted LP gas with an inlet pressure of 11.0 in
w.c., with a 0.5 in. w.c. pressure drop and a specific gravity of
1.50. The appliance requires 1,670 cubic BTU of LP gas. What
size metallic pipe should be installed? - correct answer -2"
2. What is the MINIMUM amount of time required to perform a
pressure test on a gas line in a single family home? - correct
answer -10 minutes
3. When cutting threads on a 2" steel pipe that is being used for a
gas line, what is the approximate length of the threaded portion
for each joint? - correct answer -1-0"
4. A commercial building has a 45 foot tall chimney with a total of
341,000 Btu input from one Category 1 natural draft vented
appliance that has a Type B metal connector with a 10 foot
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lateral. What size masonry chimney is needed? - correct
answer -8"
5. What type of venting system shall be used for a listed vented
wall furnace? - correct answer -Type B-W
6. A fuel-fired appliance is installed in a garage . What MINIMUM
distance above the floor shall the source of burner ignition be
located? - correct answer -18"
7. When all combustion air is supplied by a mechanical system,
the amount of combustion air shall be... - correct answer -0.35
cubic feet per minute per 1000Btu/hr of appliance input
8. What is the standard method for calculating the MINIMUM
required volume of combustion air? - correct answer -50 cubic
feet 3 per 1000 Btu/hr of appliance input
9. What is the MINIMUM horizontal clearance required for a listed
countertop food service appliance such as coffee brewers and
food warmers? - correct answer -6"
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10. What are the MINIMUM size screen openings for exterior
combustion air intakes that have louvres or grills covering the
openings? - correct answer -1/4"
11. What is the MINIMUM thickness of an 8" galvanized steel
low-heat appliance vent connector? - correct answer -0.023"
12. What is the MINIMUM size clear access opening for a
trapdoor or scuttle used to access appliances installed on a
roof? - correct answer -22" x 24"
13. An appliance installed in an attic shall have a platform to
service in front of the appliance. What is the MINIMUM size of
the structure? - correct answer -30" X 30"
14. What is the MAXIMUM horizontal length of a Type B double-
wall vent connector? - correct answer -100% of the chimney
height
MAINE GAS EXAM - WITH CODES
2026 QUESTIONS AND ANSWERS|
ACE YOUR GRADES.
1. A 127 foot long gas line is being installed in metallic pipe. The
system is undiluted LP gas with an inlet pressure of 11.0 in
w.c., with a 0.5 in. w.c. pressure drop and a specific gravity of
1.50. The appliance requires 1,670 cubic BTU of LP gas. What
size metallic pipe should be installed? - correct answer -2"
2. What is the MINIMUM amount of time required to perform a
pressure test on a gas line in a single family home? - correct
answer -10 minutes
3. When cutting threads on a 2" steel pipe that is being used for a
gas line, what is the approximate length of the threaded portion
for each joint? - correct answer -1-0"
4. A commercial building has a 45 foot tall chimney with a total of
341,000 Btu input from one Category 1 natural draft vented
appliance that has a Type B metal connector with a 10 foot
, Page | 2
lateral. What size masonry chimney is needed? - correct
answer -8"
5. What type of venting system shall be used for a listed vented
wall furnace? - correct answer -Type B-W
6. A fuel-fired appliance is installed in a garage . What MINIMUM
distance above the floor shall the source of burner ignition be
located? - correct answer -18"
7. When all combustion air is supplied by a mechanical system,
the amount of combustion air shall be... - correct answer -0.35
cubic feet per minute per 1000Btu/hr of appliance input
8. What is the standard method for calculating the MINIMUM
required volume of combustion air? - correct answer -50 cubic
feet 3 per 1000 Btu/hr of appliance input
9. What is the MINIMUM horizontal clearance required for a listed
countertop food service appliance such as coffee brewers and
food warmers? - correct answer -6"
, Page | 3
10. What are the MINIMUM size screen openings for exterior
combustion air intakes that have louvres or grills covering the
openings? - correct answer -1/4"
11. What is the MINIMUM thickness of an 8" galvanized steel
low-heat appliance vent connector? - correct answer -0.023"
12. What is the MINIMUM size clear access opening for a
trapdoor or scuttle used to access appliances installed on a
roof? - correct answer -22" x 24"
13. An appliance installed in an attic shall have a platform to
service in front of the appliance. What is the MINIMUM size of
the structure? - correct answer -30" X 30"
14. What is the MAXIMUM horizontal length of a Type B double-
wall vent connector? - correct answer -100% of the chimney
height
