MAINE GAS EXAM - WITH CODES EXAM
QUESTIONS WITH COMPLETE
SOLUTIONS
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
What is the minimum size dimension of outdoor combustion air openings? - Answer-3"
NFPA 54 9.3.3
What is the maximum operating pressure for a low pressure steam boiler? - Answer-15
psi
What is the maximum distance between horizontal supports for half inch OD copper
tubing used for gas supply piping? - Answer-4 feet
NFPA 54 Table 7.2.5.2
, What type of valve shall be used at the point of connection when a gas system has
supplementary standby gas connected downstream of the meter? - Answer-Three-way
valve
NFPA 54 5.3.2.2
When an appliance is installed in an attic space, what maximum distance from the attic
access can the appliance be installed when measured along the centerline? - Answer-
20 feet
NFPA 54 9.5.1.1
What is the maximum BTU per hour input rating for a listed unvented wall-mounted
room heater equipped with an oxygen depletion safety shut off system being installed in
a bedroom? - Answer-Maine Fuel Board Exception 6.2.3.3 (Maine does not allow)
What is the minimum horizontal clearance from combustible material for an unlisted
outdoor open flame illuminating appliance with a flame height of 24 inches above the
burner head? - Answer-3 feet
NFPA 54 Table 10.16.2.2
What minimum amount of slope per foot should a vent connector have upward toward
the chimney? - Answer-1/4" per foot
NFPA 54 12.11.7
Given: A manufacturing plant is replacing their boiler which was used for heating the
plant only. The new boiler will supply steam for heating plus be used for some
manufacturing processes. The new boiler will be low pressure and use undiluted
propane gas for the fuel. The boiler room is located 156 feet away from the gas meter,
which supplies gas at 11.0 inches of water column inlet pressure with a pressure drop of
0.5 inches water column with a specific gravity of 1.50.
What size corrugated stainless steel tubing should be used to supply the 820,000 BTU
of gas per hour boiler? - Answer-60 EHD
Recirculating direct-fired industrial air heaters shall receive outside ventilation air into
the space at a rate of... - Answer-Requirements listed on the heater's rating plate.
NFPA 54 10.9.5
What is the MAXIMUM length of an indoor nonmetallic gas connector hose for gas
equipment that requires mobility? - Answer-6 feet
QUESTIONS WITH COMPLETE
SOLUTIONS
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
What is the minimum size dimension of outdoor combustion air openings? - Answer-3"
NFPA 54 9.3.3
What is the maximum operating pressure for a low pressure steam boiler? - Answer-15
psi
What is the maximum distance between horizontal supports for half inch OD copper
tubing used for gas supply piping? - Answer-4 feet
NFPA 54 Table 7.2.5.2
, What type of valve shall be used at the point of connection when a gas system has
supplementary standby gas connected downstream of the meter? - Answer-Three-way
valve
NFPA 54 5.3.2.2
When an appliance is installed in an attic space, what maximum distance from the attic
access can the appliance be installed when measured along the centerline? - Answer-
20 feet
NFPA 54 9.5.1.1
What is the maximum BTU per hour input rating for a listed unvented wall-mounted
room heater equipped with an oxygen depletion safety shut off system being installed in
a bedroom? - Answer-Maine Fuel Board Exception 6.2.3.3 (Maine does not allow)
What is the minimum horizontal clearance from combustible material for an unlisted
outdoor open flame illuminating appliance with a flame height of 24 inches above the
burner head? - Answer-3 feet
NFPA 54 Table 10.16.2.2
What minimum amount of slope per foot should a vent connector have upward toward
the chimney? - Answer-1/4" per foot
NFPA 54 12.11.7
Given: A manufacturing plant is replacing their boiler which was used for heating the
plant only. The new boiler will supply steam for heating plus be used for some
manufacturing processes. The new boiler will be low pressure and use undiluted
propane gas for the fuel. The boiler room is located 156 feet away from the gas meter,
which supplies gas at 11.0 inches of water column inlet pressure with a pressure drop of
0.5 inches water column with a specific gravity of 1.50.
What size corrugated stainless steel tubing should be used to supply the 820,000 BTU
of gas per hour boiler? - Answer-60 EHD
Recirculating direct-fired industrial air heaters shall receive outside ventilation air into
the space at a rate of... - Answer-Requirements listed on the heater's rating plate.
NFPA 54 10.9.5
What is the MAXIMUM length of an indoor nonmetallic gas connector hose for gas
equipment that requires mobility? - Answer-6 feet
