Maine Gas Exam - with codes Questions & Answers Rated A+
Minimum vertical height for a Type B-W gas vent above the bottom of a wall furnace? -
ANSWER-12 Feet
NFPA 54 12.7.2(3)
Minimum thickness of a steel striker barrier for gas tubing protection? - ANSWER-
0.0508"
NFPA 54 7.3.4
What is the maximum temp that a clay flue liner must be able to withstand without
cracking? - ANSWER-1,800 degrees F
NFPA 54 12.6.1.3
Combustion air obtained from indoors on the same story shall have a minimum of... -
ANSWER-Two openings. Each opening 1in squared/1000 btu/hr of all appliances in
space
NFPA 54 9.3.2.3
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?
- ANSWER-50 feet
NFPA 54 9.6.4.3
What reference standard covers the storage of liquid propane gas? - ANSWER-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 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? - ANSWER-1 "
Maximum distance a gas shut-off valve can be installed from the equipment it serves? -
ANSWER-6 feet
NFPA 54 9.6.4.1
Maximum distance off the ceiling of the room shall an indoor combustion air opening be
installed? - ANSWER-12"
NFPA 54 9.3.2.3
What is the minimum required clearance for an unlisted pool heater on all sides and
rear? - ANSWER-12"
NFPA 54 10.21.2(3)
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? - ANSWER-Rubber
NFPA 54 5.6.11
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?! - ANSWER-Anhydrous Citric Acid
, When a mechanical appliance is installed in an excavation deeper than 12", what shall
the excavation be lined with? - ANSWER-Copper pan, concrete pit, or other suitable
material
NFPA 54 10.11.9
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? - ANSWER-Monitoring
NFPA 54 3.3.88.4
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? - ANSWER-10%
NFPA 54 13.2.7
What is the minimum test pressure that can be used for testing newly installed gas
piping? - ANSWER-1 1/2 times the working pressure. Not less than 3 psi
NFPA 54 8.1.4.2
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? - ANSWER-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? -
ANSWER-6"
NFPA 54 Table 12.8.4.4
Minimum vertical height for a Type B-W gas vent above the bottom of a wall furnace? -
ANSWER-12 Feet
NFPA 54 12.7.2(3)
Minimum thickness of a steel striker barrier for gas tubing protection? - ANSWER-
0.0508"
NFPA 54 7.3.4
What is the maximum temp that a clay flue liner must be able to withstand without
cracking? - ANSWER-1,800 degrees F
NFPA 54 12.6.1.3
Combustion air obtained from indoors on the same story shall have a minimum of... -
ANSWER-Two openings. Each opening 1in squared/1000 btu/hr of all appliances in
space
NFPA 54 9.3.2.3
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?
- ANSWER-50 feet
NFPA 54 9.6.4.3
What reference standard covers the storage of liquid propane gas? - ANSWER-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 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? - ANSWER-1 "
Maximum distance a gas shut-off valve can be installed from the equipment it serves? -
ANSWER-6 feet
NFPA 54 9.6.4.1
Maximum distance off the ceiling of the room shall an indoor combustion air opening be
installed? - ANSWER-12"
NFPA 54 9.3.2.3
What is the minimum required clearance for an unlisted pool heater on all sides and
rear? - ANSWER-12"
NFPA 54 10.21.2(3)
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? - ANSWER-Rubber
NFPA 54 5.6.11
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?! - ANSWER-Anhydrous Citric Acid
, When a mechanical appliance is installed in an excavation deeper than 12", what shall
the excavation be lined with? - ANSWER-Copper pan, concrete pit, or other suitable
material
NFPA 54 10.11.9
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? - ANSWER-Monitoring
NFPA 54 3.3.88.4
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? - ANSWER-10%
NFPA 54 13.2.7
What is the minimum test pressure that can be used for testing newly installed gas
piping? - ANSWER-1 1/2 times the working pressure. Not less than 3 psi
NFPA 54 8.1.4.2
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? - ANSWER-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? -
ANSWER-6"
NFPA 54 Table 12.8.4.4
