Fuel gas code Exam Questions With
Answers 2025 New Update A+ Pass
T/F - unlisted, single wall flexible vent connectors are not allowed on residential gas
equipment - Answers - ✔✔True
T/F- A small defect in a gas pipe fitting may be repaired by welding, or other proper
effective means - Answers - ✔✔False
T/F- Gas piping run through a brick or concrete wall should be sleeved or wrapped with
tape - Answers - ✔✔True
T/F-gas piping run through an interior concrete floor to an appliance, shall be run inside
an invented sealed casing - Answers - ✔✔False
gas piping run beneath an interior concrete floor must be run inside a casing that is
___________ - Answers - ✔✔vented
T/F- a steel striker barrier 1/16" min thickness shall be installed to protect gas tubing
whenever it runs through a wall plate or stud - Answers - ✔✔true
T/F- unions and pressure regulators may be installed in a concealed space provided
adequate means are taken to safety vent any leaking gas - Answers - ✔✔False
T/F- you can always smell a gas leak - Answers - ✔✔False
T/F - incinerators may be vented into a class B chimney - Answers - ✔✔False
T/F - when a ferrous gas pipe is installed underground, it may be protected from
corrosion by a field applied coating - Answers - ✔✔False
ferrous pipe installed underground must be protected by a _________
_______________ _________ - Answers - ✔✔factory applied coating
T/F - the explosive limits of natural gas are 5%-15% gas in air - Answers - ✔✔True
T/F - steel and wrought iron pipe may be used for buried gas pipe - Answers - ✔✔True
T/F - if a gas meter is installed on the outside of a building, a main shutoff must be
installed on the gas piping before it enters the building. - Answers - ✔✔False
, T/F- if an appliance is equipped with it's own combo gas valve, a separate manual gas
valve is not required - Answers - ✔✔False
T/F - it is permissible to use a gas piping system as an electrical ground, provided it is
bonded to the cold water supply - Answers - ✔✔False
T/F - a separate manual gas valve is required on each appliance - Answers - ✔✔True
T/F - an appliance gas shutoff valve shall be located within six feet of the appliance it
serves - Answers - ✔✔True
T/F - low pressure natural gas is defined as at a pressure of 14" w.c. or less - Answers -
✔✔True
T/F - low pressure gas piping is tested at 15 psi for 24 hours - Answers - ✔✔False
T/F - a leak limiting device may be used on any pounds inlet to inches water column
outlet pressure regulator - Answers - ✔✔False
T/F - a gas regulator may be installed in a false ceiling, provided the are above the
ceiling is used as a return air plenum - Answers - ✔✔False
T/F - an approved shutoff valve must be installed immediately upstream of all gas
pressure regulators - Answers - ✔✔True
T/F - it is permissible to vent pressure regulators into a common vent, provided said
vent is 1-1/2 times the cross sectional area of the largest individual vent - Answers -
✔✔False
T/F - low pressure regulators may be vented into a class "A" chimney provided all
appliance flues are vented into a liner - Answers - ✔✔False
T/F - manually operated dampers may be installed in appliance vents, provided they are
used to increase appliance efficiency - Answers - ✔✔False
T/F - an exhaust terminal from an appliance equipped with a forced draft vent shall be at
least seven feet above a public sidewalk - Answers - ✔✔True
T/F - manual dampers may be installed in combustion air intake ducts so that they can
be closed during summer months to conserve cooling costs, are permissible by code -
Answers - ✔✔False
Answers 2025 New Update A+ Pass
T/F - unlisted, single wall flexible vent connectors are not allowed on residential gas
equipment - Answers - ✔✔True
T/F- A small defect in a gas pipe fitting may be repaired by welding, or other proper
effective means - Answers - ✔✔False
T/F- Gas piping run through a brick or concrete wall should be sleeved or wrapped with
tape - Answers - ✔✔True
T/F-gas piping run through an interior concrete floor to an appliance, shall be run inside
an invented sealed casing - Answers - ✔✔False
gas piping run beneath an interior concrete floor must be run inside a casing that is
___________ - Answers - ✔✔vented
T/F- a steel striker barrier 1/16" min thickness shall be installed to protect gas tubing
whenever it runs through a wall plate or stud - Answers - ✔✔true
T/F- unions and pressure regulators may be installed in a concealed space provided
adequate means are taken to safety vent any leaking gas - Answers - ✔✔False
T/F- you can always smell a gas leak - Answers - ✔✔False
T/F - incinerators may be vented into a class B chimney - Answers - ✔✔False
T/F - when a ferrous gas pipe is installed underground, it may be protected from
corrosion by a field applied coating - Answers - ✔✔False
ferrous pipe installed underground must be protected by a _________
_______________ _________ - Answers - ✔✔factory applied coating
T/F - the explosive limits of natural gas are 5%-15% gas in air - Answers - ✔✔True
T/F - steel and wrought iron pipe may be used for buried gas pipe - Answers - ✔✔True
T/F - if a gas meter is installed on the outside of a building, a main shutoff must be
installed on the gas piping before it enters the building. - Answers - ✔✔False
, T/F- if an appliance is equipped with it's own combo gas valve, a separate manual gas
valve is not required - Answers - ✔✔False
T/F - it is permissible to use a gas piping system as an electrical ground, provided it is
bonded to the cold water supply - Answers - ✔✔False
T/F - a separate manual gas valve is required on each appliance - Answers - ✔✔True
T/F - an appliance gas shutoff valve shall be located within six feet of the appliance it
serves - Answers - ✔✔True
T/F - low pressure natural gas is defined as at a pressure of 14" w.c. or less - Answers -
✔✔True
T/F - low pressure gas piping is tested at 15 psi for 24 hours - Answers - ✔✔False
T/F - a leak limiting device may be used on any pounds inlet to inches water column
outlet pressure regulator - Answers - ✔✔False
T/F - a gas regulator may be installed in a false ceiling, provided the are above the
ceiling is used as a return air plenum - Answers - ✔✔False
T/F - an approved shutoff valve must be installed immediately upstream of all gas
pressure regulators - Answers - ✔✔True
T/F - it is permissible to vent pressure regulators into a common vent, provided said
vent is 1-1/2 times the cross sectional area of the largest individual vent - Answers -
✔✔False
T/F - low pressure regulators may be vented into a class "A" chimney provided all
appliance flues are vented into a liner - Answers - ✔✔False
T/F - manually operated dampers may be installed in appliance vents, provided they are
used to increase appliance efficiency - Answers - ✔✔False
T/F - an exhaust terminal from an appliance equipped with a forced draft vent shall be at
least seven feet above a public sidewalk - Answers - ✔✔True
T/F - manual dampers may be installed in combustion air intake ducts so that they can
be closed during summer months to conserve cooling costs, are permissible by code -
Answers - ✔✔False
