Maine Gas Exam Question & Answers
(Latest 2025 )
Minimum vertical height for a Type B-W gas vent above the bottom of a
wall furnace? - CORRECT ANSWERS ✔✔12 Feet
Minimum thickness of a steel striker barrier for gas tubing protection? -
CORRECT ANSWERS ✔✔0.0508"
What is the maximum temp that a clay flue liner must be able to
withstand without cracking? - CORRECT ANSWERS ✔✔1,800
degrees F
Combustion air obtained from indoors on the same story shall have a
minimum of... - CORRECT ANSWERS ✔✔Two openings
When gas is being supplied by a manifold located in a remote area,
what is the maximum distance the shutoff valve at the manifold can be
located from the appliance? - CORRECT ANSWERS ✔✔50 feet
What reference standard covers the storage of liquid propane gas? -
CORRECT ANSWERS ✔✔NFPA 58
A service station is being built with one boiler 28 feet away from the
meter that uses natural gas; all other equipment is electric. What size K
or L semi-rigid copper tubing should be installed to supply 205 cu. ft. of
,Maine Gas Exam Question & Answers
(Latest 2025 )
gas per hour with an inlet pressure less than 2 psi, pressure drop of 0.3
in. W.C. and a specific gravity of 0.60? - CORRECT ANSWERS ✔✔1 "
Maximum distance a gas shut-off valve can be installed from the
equipment it serves? - CORRECT ANSWERS ✔✔6 feet
Maximum distance off the ceiling of the room shall an indoor
combustion air opening be installed? - CORRECT ANSWERS ✔✔12"
What is the minimum required clearance for an unlisted pool heater on
all sides and rear? - CORRECT ANSWERS ✔✔12"
Flanges used for gas piping shall have gaskets made of an approved
material designed to withstand temperatures, pressure and chemical
constituents of the gas. Which of the following gasket materials is not
acceptable? - CORRECT ANSWERS ✔✔Rubber
When corrosive or flammable fumes or gases are present near
appliances, a safe disposal method shall be provided. All of the
following are considered flammable or corrosive EXCEPT?! - CORRECT
ANSWERS ✔✔Anhydrous Citric Acid
, Maine Gas Exam Question & Answers
(Latest 2025 )
When a mechanical appliance is installed in an excavation deeper than
12", what shall the excavation be lined with? - CORRECT ANSWERS
✔✔Copper pan
Which type of regulator is used in series with an another pressure
regulator for the purpose of automatically taking over in an emergency
the control of the pressure down stream in case the pressure tends to
exceed a set maximum? - CORRECT ANSWERS ✔✔Monitoring
When more than 2 90° elbow's are required in a vent connector, the
maximum capacity of the connector shall be reduced for each
additional 90° elbow by? - CORRECT ANSWERS ✔✔10%
What is the minimum test pressure that can be used for testing newly
installed gas piping? - CORRECT ANSWERS ✔✔3 psig
What is the minimum vertical distance to the bottom of a combustion
air intake located on the exterior of a building above adjacent finish
ground level? - CORRECT ANSWERS ✔✔12"
A residential boiler or furnace with a listed gas conversion burner and
draft hood with a type B gas vent shall have a minimum clearance from
combustible materials of? - CORRECT ANSWERS ✔✔6"
(Latest 2025 )
Minimum vertical height for a Type B-W gas vent above the bottom of a
wall furnace? - CORRECT ANSWERS ✔✔12 Feet
Minimum thickness of a steel striker barrier for gas tubing protection? -
CORRECT ANSWERS ✔✔0.0508"
What is the maximum temp that a clay flue liner must be able to
withstand without cracking? - CORRECT ANSWERS ✔✔1,800
degrees F
Combustion air obtained from indoors on the same story shall have a
minimum of... - CORRECT ANSWERS ✔✔Two openings
When gas is being supplied by a manifold located in a remote area,
what is the maximum distance the shutoff valve at the manifold can be
located from the appliance? - CORRECT ANSWERS ✔✔50 feet
What reference standard covers the storage of liquid propane gas? -
CORRECT ANSWERS ✔✔NFPA 58
A service station is being built with one boiler 28 feet away from the
meter that uses natural gas; all other equipment is electric. What size K
or L semi-rigid copper tubing should be installed to supply 205 cu. ft. of
,Maine Gas Exam Question & Answers
(Latest 2025 )
gas per hour with an inlet pressure less than 2 psi, pressure drop of 0.3
in. W.C. and a specific gravity of 0.60? - CORRECT ANSWERS ✔✔1 "
Maximum distance a gas shut-off valve can be installed from the
equipment it serves? - CORRECT ANSWERS ✔✔6 feet
Maximum distance off the ceiling of the room shall an indoor
combustion air opening be installed? - CORRECT ANSWERS ✔✔12"
What is the minimum required clearance for an unlisted pool heater on
all sides and rear? - CORRECT ANSWERS ✔✔12"
Flanges used for gas piping shall have gaskets made of an approved
material designed to withstand temperatures, pressure and chemical
constituents of the gas. Which of the following gasket materials is not
acceptable? - CORRECT ANSWERS ✔✔Rubber
When corrosive or flammable fumes or gases are present near
appliances, a safe disposal method shall be provided. All of the
following are considered flammable or corrosive EXCEPT?! - CORRECT
ANSWERS ✔✔Anhydrous Citric Acid
, Maine Gas Exam Question & Answers
(Latest 2025 )
When a mechanical appliance is installed in an excavation deeper than
12", what shall the excavation be lined with? - CORRECT ANSWERS
✔✔Copper pan
Which type of regulator is used in series with an another pressure
regulator for the purpose of automatically taking over in an emergency
the control of the pressure down stream in case the pressure tends to
exceed a set maximum? - CORRECT ANSWERS ✔✔Monitoring
When more than 2 90° elbow's are required in a vent connector, the
maximum capacity of the connector shall be reduced for each
additional 90° elbow by? - CORRECT ANSWERS ✔✔10%
What is the minimum test pressure that can be used for testing newly
installed gas piping? - CORRECT ANSWERS ✔✔3 psig
What is the minimum vertical distance to the bottom of a combustion
air intake located on the exterior of a building above adjacent finish
ground level? - CORRECT ANSWERS ✔✔12"
A residential boiler or furnace with a listed gas conversion burner and
draft hood with a type B gas vent shall have a minimum clearance from
combustible materials of? - CORRECT ANSWERS ✔✔6"
