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IFGC Exam Questions And Accurate Answers
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2025-2026 IFGC Exam Questions AndAccurate Answers
Chapter 1: Scope and Administration
Tabs: Emergency Permit (106.1)
The Code used when gas piping installations are from the point of delivery to the outlet
of the appliance shutoff valve(s) is _______.
IFGC (2018 IFGC: [A] 101.2.2)
On Saturday, June 8th, an emergency gas appliance repair was required. If the Building
Department is open, the permit is to be obtained on _______.
Monday, June 10th (2018 IFGC: [A] 106.1 Exception)
Chapter 2: Definitions
Tabs: Definitions (202)
Appliances that are constructed and installed so that all air for combustion is derived
directly from the outdoor atmosphere and all flue gases are discharged directly to the
outdoor atmosphere is BEST defined as a/an _______.
Direct-vent appliance (2018 IFGC: Section 202 General Definitions)
Chapter 3: General Regulations
Tabs: Indoor Air Standard (304.5.1), Two-Opening Method (304.6.1), Louver Openings
,(304.10)
A gas appliance has been installed within a building. To dilute the gases of this
appliance, the minimum indoor required combustion air shall be _______ of the
appliance's input rating.
50 cubic ft per 1,000 Btu/h (2018 IFGC: 304.5.1)
The minimum dimension of outside combustion air openings for a gas appliance shall be
no less than _______.
3 inches (2018 IFGC: 304.6)
When using the two-permanent-openings method for outdoor combustion air, and where
communicating with the outdoors through vertical ducts, each opening shall have a
minimum free area of _______ of total input rating of all appliances in the enclosure.
1 square inch per 4,000 Btu/h (2018 IFGC: 304.6.1)
The input rating of a fuel-burning natural gas appliance is 200,000 Btu/h. The appliance
is being installed in a confined location with all its combustion air being supplied
through VERTICAL ducts. The system is using the two-permanent-openings method.
Each opening shall have at least _______ of unobstructed free area.
50 square in (2018 IFGC: 304.6.1)
When using the two-permanent-openings method for a gas appliance, one opening shall
be within _______ inches of the top of the enclosure, and one shall be within ________
inches of the bottom of the enclosure.
12, 12 (2018 IFGC: 304.6.1)
The input rating of a fuel-burning natural gas appliance is 200,000 Btu/h. The appliance
is being installed in a confined location with all its combustion air being supplied
through HORIZONTAL ducts. The system is using the two-permanent-openings method.
Each opening shall have at least _______ of unobstructed free area.
100 square in (2018 IFGC: 304.6.1)
, Combustion air is provided by a mechanical air supply system from the outdoors. The
rate of the combustion air shall not be less than _______ of total input rating of all
appliances located within the space.
0.35 cubic feet per minute per 1,000 Btu/h
(2018 IFGC: 304.9)
A wood louver is being used for combustion. Its opening size is not known. It is assumed
that the wood louver shall have a/an _______ free area.
25 percent (2018 IFGC: 304.10)
A metal louver is being used for combustion air. Its screen shall have a mesh size not
smaller than _______.
1/4 in (2018 IFGC: 304.10)
A metal louver is being used for combustion. Its opening size is not known. It is assumed
that the metal louver shall have a/an _______ free area.
75 percent (2018 IFGC: 304.10)
A gas appliance is equipped with an ignition source. The source of ignition shall be at
least _______ above the floor of a private garage.
18 in (2018 IFGC: 305.3)
Where a gas appliance is located on a roof top higher than _______ above grade, an
exterior means of access shall be provided.
16 ft (2018 IFGC: [M] 306.5)
A guard is required for a platform on a roof having a slope of 6:12. The guard shall
extend not less than _______ above the platform.
42 inches (2018 IFGC: [M] 306.5.1)
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