Maine Gas Exam - with codes
Study online at https://quizlet.com/_eoczk0
1. Minimum vertical height for a Type B-W gas vent 12 Feet
above the bottom of a wall furnace?
NFPA 54 12.7.2(3)
2. Minimum thickness of a steel striker barrier for gas 0.0508"
tubing protection?
NFPA 54 7.3.4
3. What is the maximum temp that a clay flue liner must 1,800 degrees F
be able to withstand without cracking?
NFPA 54 12.6.1.3
4. Combustion air obtained from indoors on the same Two openings.
story shall have a minimum of... Each opening 1in
squared/1000 btu/hr of
all appliances in space
NFPA 54 9.3.2.3
5. When gas is being supplied by a manifold located in 50 feet
a remote area, what is the maximum distance the
shutoff valve at the manifold can be located from the NFPA 54 9.6.4.3
appliance?
6. What reference standard covers the storage of liquid NFPA 58
propane gas?
7. A service station is being built with one boiler 28 feet 1 "
away from the meter that uses natural gas; all other
equipment is electric. What size K or L semi-rigid cop-
per 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?
, Maine Gas Exam - with codes
Study online at https://quizlet.com/_eoczk0
8. Maximum distance a gas shut-off valve can be in- 6 feet
stalled from the equipment it serves?
NFPA 54 9.6.4.1
9. Maximum distance off the ceiling of the room shall an 12"
indoor combustion air opening be installed?
NFPA 54 9.3.2.3
10. What is the minimum required clearance for an unlist- 12"
ed pool heater on all sides and rear?
NFPA 54 10.21.2(3)
11. Flanges used for gas piping shall have gaskets made Rubber
of an approved material designed to withstand tem-
peratures, pressure and chemical constituents of the NFPA 54 5.6.11
gas. Which of the following gasket materials is not
acceptable?
12. When corrosive or flammable fumes or gases are pre- Anhydrous Citric Acid
sent near appliances, a safe disposal method shall be
provided. All of the following are considered flamma-
ble or corrosive EXCEPT?!
13. When a mechanical appliance is installed in an exca- Copper pan, concrete pit,
vation deeper than 12", what shall the excavation be or other suitable material
lined with?
NFPA 54 10.11.9
14. Which type of regulator is used in series with an an- Monitoring
other pressure regulator for the purpose of automat-
ically taking over in an emergency the control of the NFPA 54 3.3.88.4
pressure down stream in case the pressure tends to
exceed a set maximum?
, Maine Gas Exam - with codes
Study online at https://quizlet.com/_eoczk0
15. When more than 2 90° elbow's are required in a vent 10%
connector, the maximum capacity of the connector
shall be reduced for each additional 90° elbow by? NFPA 54 13.2.7
16. What is the minimum test pressure that can be used 1 1/2 times the working
for testing newly installed gas piping? pressure. Not less than 3
psi
NFPA 54 8.1.4.2
17. What is the minimum vertical distance to the bottom 12"
of a combustion air intake located on the exterior of a
building above adjacent finish ground level?
18. A residential boiler or furnace with a listed gas con- 6"
version burner and draft hood with a type B gas vent
shall have a minimum clearance from combustible NFPA 54 Table 12.8.4.4
materials of?
19. What is the maximum btu/hr input for an unlisted dec- 50,400 BTU
orative appliance installed in a vented fireplace with
an 18 foot tall chimney and permanent free opening NFPA 54 10.6.2.3
area of 29 in.²?
20. All of the following piping materials are approved to Cast Iron
be used for gas piping except...
NFPA 54 5.6.2.1
21. What is the minimum size dimension of outdoor com- 3"
bustion air openings?
NFPA 54 9.3.3
22. What is the maximum operating pressure for a low 15 psi
pressure steam boiler?
Study online at https://quizlet.com/_eoczk0
1. Minimum vertical height for a Type B-W gas vent 12 Feet
above the bottom of a wall furnace?
NFPA 54 12.7.2(3)
2. Minimum thickness of a steel striker barrier for gas 0.0508"
tubing protection?
NFPA 54 7.3.4
3. What is the maximum temp that a clay flue liner must 1,800 degrees F
be able to withstand without cracking?
NFPA 54 12.6.1.3
4. Combustion air obtained from indoors on the same Two openings.
story shall have a minimum of... Each opening 1in
squared/1000 btu/hr of
all appliances in space
NFPA 54 9.3.2.3
5. When gas is being supplied by a manifold located in 50 feet
a remote area, what is the maximum distance the
shutoff valve at the manifold can be located from the NFPA 54 9.6.4.3
appliance?
6. What reference standard covers the storage of liquid NFPA 58
propane gas?
7. A service station is being built with one boiler 28 feet 1 "
away from the meter that uses natural gas; all other
equipment is electric. What size K or L semi-rigid cop-
per 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?
, Maine Gas Exam - with codes
Study online at https://quizlet.com/_eoczk0
8. Maximum distance a gas shut-off valve can be in- 6 feet
stalled from the equipment it serves?
NFPA 54 9.6.4.1
9. Maximum distance off the ceiling of the room shall an 12"
indoor combustion air opening be installed?
NFPA 54 9.3.2.3
10. What is the minimum required clearance for an unlist- 12"
ed pool heater on all sides and rear?
NFPA 54 10.21.2(3)
11. Flanges used for gas piping shall have gaskets made Rubber
of an approved material designed to withstand tem-
peratures, pressure and chemical constituents of the NFPA 54 5.6.11
gas. Which of the following gasket materials is not
acceptable?
12. When corrosive or flammable fumes or gases are pre- Anhydrous Citric Acid
sent near appliances, a safe disposal method shall be
provided. All of the following are considered flamma-
ble or corrosive EXCEPT?!
13. When a mechanical appliance is installed in an exca- Copper pan, concrete pit,
vation deeper than 12", what shall the excavation be or other suitable material
lined with?
NFPA 54 10.11.9
14. Which type of regulator is used in series with an an- Monitoring
other pressure regulator for the purpose of automat-
ically taking over in an emergency the control of the NFPA 54 3.3.88.4
pressure down stream in case the pressure tends to
exceed a set maximum?
, Maine Gas Exam - with codes
Study online at https://quizlet.com/_eoczk0
15. When more than 2 90° elbow's are required in a vent 10%
connector, the maximum capacity of the connector
shall be reduced for each additional 90° elbow by? NFPA 54 13.2.7
16. What is the minimum test pressure that can be used 1 1/2 times the working
for testing newly installed gas piping? pressure. Not less than 3
psi
NFPA 54 8.1.4.2
17. What is the minimum vertical distance to the bottom 12"
of a combustion air intake located on the exterior of a
building above adjacent finish ground level?
18. A residential boiler or furnace with a listed gas con- 6"
version burner and draft hood with a type B gas vent
shall have a minimum clearance from combustible NFPA 54 Table 12.8.4.4
materials of?
19. What is the maximum btu/hr input for an unlisted dec- 50,400 BTU
orative appliance installed in a vented fireplace with
an 18 foot tall chimney and permanent free opening NFPA 54 10.6.2.3
area of 29 in.²?
20. All of the following piping materials are approved to Cast Iron
be used for gas piping except...
NFPA 54 5.6.2.1
21. What is the minimum size dimension of outdoor com- 3"
bustion air openings?
NFPA 54 9.3.3
22. What is the maximum operating pressure for a low 15 psi
pressure steam boiler?
