Maine Gas Exam Practice Questions and Answers
Minimum vertical height for a Type B-W gas vent above the bottom of a
wall furnace? - Answer️️ -12 Feet
NFPA 54 12.7.2(3)
Minimum thickness of a steel striker barrier for gas tubing protection? -
Answer️️ -0.0508"
NFPA 54 7.3.4
What is th...
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
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"
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
3
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