Fuel Gas Code Exam Questions With All
Complete Solutions 2025 Marking
Scheme
Installation, testing, purging, and replacement of gas piping, appliances, or accessories,
and repair and servicing of equipment, shall be performed only by a ___ ___. - Answers
- ✔✔qualified agency
When the gas supply is to be turned off, it shall be the duty of the ___ ___ to notify all
affected users. - Answers - ✔✔qualified agency
Where work is being performed on piping that contains or has contained gas, smoking,
open flames, lanterns, welding, or other sources of ignition ___ ___ be permitted. -
Answers - ✔✔shall not
Where required by the authority having jurisdiction, a ___ ___ or plan shall be prepared
before proceeding with the installation. - Answers - ✔✔piping sketch
When providing a piping system plan, the plan shall show the proposed ___ of piping,
the ___ of the different branches, the various ___ demands, and the ___ of the point of
delivery. - Answers - ✔✔location, size, load, location
Where two or more meters, or two or more service regulators where meters are not
provided, are located on the same premises and supply separate users, the gas piping
systems shall no be interconnected on the ___ ___ of the meters or service regulators. -
Answers - ✔✔outlet side
Gas piping systems shall be of such size and so installed as to provide a supply of gas
sufficient to meet the ___ demand and supply gas to each appliance inlet not less than
the minimum supply pressure required by the appliance. - Answers - ✔✔maximum
The volumetric flow rate of gas to be provided (in cubic ft per hour) shall be calculated
using the ___ input ratings of the appliances served, adjusted for altitude. - Answers -
✔✔manufacturers'
The maximum design operating pressure for piping systems located inside buildings
shall not exceed ___ ___. - Answers - ✔✔5 PSI
Exception for the maximum pressure for pipping systems located inside buildings shall
not exceed 5 PSI is an LP-gas piping system with a design operating pressure greater
than ___ ___ and complies with NFPA 58 Liquefied Petroleum Gas Code. - Answers -
✔✔20 PSI
, ___ and ___ pipe shall not be used if the gas contains more than an average of 0.3
grains of hydrogen sulfide per 100 scf of gas. - Answers - ✔✔Copper and Brass
Polyethylene plastic pipe, tubing, & fittings used to supply feul gas shall conform to
ASTM D 2513 & shall be marked ___ & ____ on pipe. - Answers - ✔✔"gas" & ASTM D
2513
___ ___ compounds shall be resistant to the action of LP-gas or to any other chemical
constituents of the gases to be conducted through he piping. - Answers - ✔✔Threaded
Joint
Gas meter capacity shall be selected for the ___ expected pressure & permissible
pressure ___. - Answers - ✔✔Maximum, drop
Gas meters shall be located in ventilated spaces ___ ___ for examination, reading,
replacement, or necessary maintenance. - Answers - ✔✔readily accessible
Gas meters shall be supported or connected to ___ piping so as not to exert a strain on
the meters. - Answers - ✔✔ridged
Where flexible connectors are used to connect a gas meter to downstream piping at
mobile homes in mobile home parks, the meter shall be supported by a post or bracket
placed in a firm footing or by other means providing equivalent ___. - Answers -
✔✔support
Gas piping at multiple meter installations shall be marked by a ___ ___ or other
permanent means designating the building or the part of the building being supplied and
attached by the installing agency. - Answers - ✔✔metal tag
___ ___ devices shall be provided to prevent the pressure in the piping system from
exceeding that value that would cause unsafe operation of any connected and properly
adjusted appliances. - Answers - ✔✔Overpressure protection
Underground gas piping systems shall be installed with a minimum of ___ of cover. The
minimum cover shall be increased to ___ if external damage to the pipe of tubing from
external forces is likely to result. - Answers - ✔✔12 inches; 18 inches
Where a minimum of 12 inches of cover cannot be provided, the pipe shall be installed
in ____ or bridged (shielded). - Answers - ✔✔conduit
The trench for gas piping shall be ___ so that the pipe has a firm, substantially
continuous bearing on the bottom of the trench. - Answers - ✔✔graded
Complete Solutions 2025 Marking
Scheme
Installation, testing, purging, and replacement of gas piping, appliances, or accessories,
and repair and servicing of equipment, shall be performed only by a ___ ___. - Answers
- ✔✔qualified agency
When the gas supply is to be turned off, it shall be the duty of the ___ ___ to notify all
affected users. - Answers - ✔✔qualified agency
Where work is being performed on piping that contains or has contained gas, smoking,
open flames, lanterns, welding, or other sources of ignition ___ ___ be permitted. -
Answers - ✔✔shall not
Where required by the authority having jurisdiction, a ___ ___ or plan shall be prepared
before proceeding with the installation. - Answers - ✔✔piping sketch
When providing a piping system plan, the plan shall show the proposed ___ of piping,
the ___ of the different branches, the various ___ demands, and the ___ of the point of
delivery. - Answers - ✔✔location, size, load, location
Where two or more meters, or two or more service regulators where meters are not
provided, are located on the same premises and supply separate users, the gas piping
systems shall no be interconnected on the ___ ___ of the meters or service regulators. -
Answers - ✔✔outlet side
Gas piping systems shall be of such size and so installed as to provide a supply of gas
sufficient to meet the ___ demand and supply gas to each appliance inlet not less than
the minimum supply pressure required by the appliance. - Answers - ✔✔maximum
The volumetric flow rate of gas to be provided (in cubic ft per hour) shall be calculated
using the ___ input ratings of the appliances served, adjusted for altitude. - Answers -
✔✔manufacturers'
The maximum design operating pressure for piping systems located inside buildings
shall not exceed ___ ___. - Answers - ✔✔5 PSI
Exception for the maximum pressure for pipping systems located inside buildings shall
not exceed 5 PSI is an LP-gas piping system with a design operating pressure greater
than ___ ___ and complies with NFPA 58 Liquefied Petroleum Gas Code. - Answers -
✔✔20 PSI
, ___ and ___ pipe shall not be used if the gas contains more than an average of 0.3
grains of hydrogen sulfide per 100 scf of gas. - Answers - ✔✔Copper and Brass
Polyethylene plastic pipe, tubing, & fittings used to supply feul gas shall conform to
ASTM D 2513 & shall be marked ___ & ____ on pipe. - Answers - ✔✔"gas" & ASTM D
2513
___ ___ compounds shall be resistant to the action of LP-gas or to any other chemical
constituents of the gases to be conducted through he piping. - Answers - ✔✔Threaded
Joint
Gas meter capacity shall be selected for the ___ expected pressure & permissible
pressure ___. - Answers - ✔✔Maximum, drop
Gas meters shall be located in ventilated spaces ___ ___ for examination, reading,
replacement, or necessary maintenance. - Answers - ✔✔readily accessible
Gas meters shall be supported or connected to ___ piping so as not to exert a strain on
the meters. - Answers - ✔✔ridged
Where flexible connectors are used to connect a gas meter to downstream piping at
mobile homes in mobile home parks, the meter shall be supported by a post or bracket
placed in a firm footing or by other means providing equivalent ___. - Answers -
✔✔support
Gas piping at multiple meter installations shall be marked by a ___ ___ or other
permanent means designating the building or the part of the building being supplied and
attached by the installing agency. - Answers - ✔✔metal tag
___ ___ devices shall be provided to prevent the pressure in the piping system from
exceeding that value that would cause unsafe operation of any connected and properly
adjusted appliances. - Answers - ✔✔Overpressure protection
Underground gas piping systems shall be installed with a minimum of ___ of cover. The
minimum cover shall be increased to ___ if external damage to the pipe of tubing from
external forces is likely to result. - Answers - ✔✔12 inches; 18 inches
Where a minimum of 12 inches of cover cannot be provided, the pipe shall be installed
in ____ or bridged (shielded). - Answers - ✔✔conduit
The trench for gas piping shall be ___ so that the pipe has a firm, substantially
continuous bearing on the bottom of the trench. - Answers - ✔✔graded
