Maine Gas Exam - with codes. Exam Questions With Correct Answers
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Course
Maine Gas
Institution
Maine Gas
Maine Gas Exam - with codes. Exam
Questions With Correct Answers
Minimum vertical height for a Type B-W gas vent above the bottom of a wall furnace? -
answer12 Feet
NFPA 54 12.7.2(3)
Minimum thickness of a steel striker barrier for gas tubing protection? - answer0.0508"
NFPA 54 7.3.4
What is...
Maine Gas Exam - with codes. Exam
Questions With Correct Answers
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
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
What is the maximum btu/hr input for an unlisted decorative appliance installed in a vented
fireplace with an 18 foot tall chimney and permanent free opening area of 29 in.²? -
answer✔50,400 BTU
NFPA 54 10.6.2.3
All of the following piping materials are approved to be used for gas piping except... -
answer✔Cast Iron
NFPA 54 5.6.2.1
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