Maine Gas Exam UPDATED Exam Questions and CORRECT Answers
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Course
Maine Gas
Institution
Maine Gas
Maine Gas Exam UPDATED Exam
Questions and CORRECT Answers
Minimum vertical height for a Type B-W gas vent above the bottom of a wall furnace? -
CORRECT ANSWER- 12 Feet
Minimum thickness of a steel striker barrier for gas tubing protection? - CORRECT
ANSWER- 0.0508"
What is the maximum temp ...
Maine Gas Exam UPDATED Exam
Questions and CORRECT Answers
Minimum vertical height for a Type B-W gas vent above the bottom of a wall furnace? -
CORRECT ANSWER- 12 Feet
Minimum thickness of a steel striker barrier for gas tubing protection? - CORRECT
ANSWER- 0.0508"
What is the maximum temp that a clay flue liner must be able to withstand without cracking?
- CORRECT ANSWER- 1,800 degrees F
Combustion air obtained from indoors on the same story shall have a minimum of... -
CORRECT ANSWER- 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
ANSWER- 50 feet
What reference standard covers the storage of liquid propane gas? - CORRECT 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? - CORRECT ANSWER- 1 "
Maximum distance a gas shut-off valve can be installed from the equipment it serves? -
CORRECT ANSWER- 6 feet
Maximum distance off the ceiling of the room shall an indoor combustion air opening be
installed? - CORRECT ANSWER- 12"
What is the minimum required clearance for an unlisted pool heater on all sides and rear? -
CORRECT ANSWER- 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 ANSWER- 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 ANSWER- Anhydrous Citric Acid
When a mechanical appliance is installed in an excavation deeper than 12", what shall the
excavation be lined with? - CORRECT ANSWER- 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 ANSWER- 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 ANSWER- 10%
What is the minimum test pressure that can be used for testing newly installed gas piping? -
CORRECT ANSWER- 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 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? - CORRECT
ANSWER- 6"
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? -
CORRECT ANSWER- 50,400 BTU
All of the following piping materials are approved to be used for gas piping except... -
CORRECT ANSWER- Cast Iron
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