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2015 INTERNATIONAL FUEL GAS CODE EXAM
NEWEST 2025 ACTUAL EXAM QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED
ANSWERS) |ALREADY GRADED A+
A valve designed to activate when fuel gas passing through it exceeds a prescribed flow rate
is a .
- CORRECT ANS>>A. Excess flow valve
An appliance that operates with a non-positive vent static pressure and with a vent gas
temperature that is capable of causing excessive condensate production in the vent is a
appliance.
- CORRECT ANS>>B. Category II
Holes bored in a floor joist shall not exceed their depth.
- CORRECT ANS>>C. 1/3
Bored holes shall no be greater than of the stud depth in non-load bearing walls where
each bored stud is doubled.
- CORRECT ANS>>B. 60%
Gas appliances shall not be located in a unless it meets one of the approved exceptions.
- CORRECT ANS>>C. Bathroom
A single wall mounted unvented natural gas room heater equipped with an oxygen depletion
safety system may be installed in a .
- CORRECT ANS>>A. bathroom if it is 6,000 btu's or less
Indoor combustion air for gas appliances using the standard method is sized based on cubic
feet per 1,000 btu/h of the appliance input rating.
- CORRECT ANS>>A. 50
How many cubic feet of space would be required to use the standard method of combustion
air for gas appliances if you had a space with a 60,000 btu fan assisted furnace, 34,000 btu
natural draft water heater, and 28,000 btu gas dryer?
- CORRECT ANS>>C. 6,100 cu ft
, 2
What would the maximum gas appliance btu input be for an open basement measuring
26'x52' with an 8' ceiling to be able to use the standard combustion air method?
- CORRECT ANS>>A. 216,320
When combing spaces on the same story to obtain the required combustion air for gas
appliances, each opening shall be sized a minimum 1 sq. in for the total input rating of all gas
appliances but not less than sq. in.
- CORRECT ANS>>D. 100
The minimum dimension of air openings for combustion air for gas appliances is
- CORRECT ANS>>A. 3"
When using two permanent openings to provide combustion air for gas appliances and
communicating directly with the outdoors, each opening shall have a minimum free area of 1
sq. in for every total input rating of all equipment in the enclosure.
- CORRECT ANS>>B. 4,000 btu
When installing all gas appliances, combustion air is allowed to utilize one permanent
opening commencing within 12" from the top of the enclosure. The opening must be a
minimum 1 sq. in for every total appliance input.
- CORRECT ANS>>B. 3,000 btu
When mechanical combustion air is provided for gas appliances, the combustion air shall be
supplied from the outdoors at a rate not less than cfm per 1,000 btu/h of total input rating of
all appliances located within the space.
- CORRECT ANS>>C. .35
Where exhaust fans are installed, air shall be provided to replace the exhausted air.
- CORRECT ANS>>D. make up
Where the design free area of louvers and grilles are not known, it shall be assumed that
wood louvers will have % free area and metal louvers will have % free area.
- CORRECT ANS>>D. 25; 75
Combustion air ducts for gas appliances shall not be where terminating in an attic.
- CORRECT ANS>>A. screened
Condensate waste and drain line size shall not be less then .
- CORRECT ANS>>D. 3/4" internal diameter
2015 INTERNATIONAL FUEL GAS CODE EXAM
NEWEST 2025 ACTUAL EXAM QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED
ANSWERS) |ALREADY GRADED A+
A valve designed to activate when fuel gas passing through it exceeds a prescribed flow rate
is a .
- CORRECT ANS>>A. Excess flow valve
An appliance that operates with a non-positive vent static pressure and with a vent gas
temperature that is capable of causing excessive condensate production in the vent is a
appliance.
- CORRECT ANS>>B. Category II
Holes bored in a floor joist shall not exceed their depth.
- CORRECT ANS>>C. 1/3
Bored holes shall no be greater than of the stud depth in non-load bearing walls where
each bored stud is doubled.
- CORRECT ANS>>B. 60%
Gas appliances shall not be located in a unless it meets one of the approved exceptions.
- CORRECT ANS>>C. Bathroom
A single wall mounted unvented natural gas room heater equipped with an oxygen depletion
safety system may be installed in a .
- CORRECT ANS>>A. bathroom if it is 6,000 btu's or less
Indoor combustion air for gas appliances using the standard method is sized based on cubic
feet per 1,000 btu/h of the appliance input rating.
- CORRECT ANS>>A. 50
How many cubic feet of space would be required to use the standard method of combustion
air for gas appliances if you had a space with a 60,000 btu fan assisted furnace, 34,000 btu
natural draft water heater, and 28,000 btu gas dryer?
- CORRECT ANS>>C. 6,100 cu ft
, 2
What would the maximum gas appliance btu input be for an open basement measuring
26'x52' with an 8' ceiling to be able to use the standard combustion air method?
- CORRECT ANS>>A. 216,320
When combing spaces on the same story to obtain the required combustion air for gas
appliances, each opening shall be sized a minimum 1 sq. in for the total input rating of all gas
appliances but not less than sq. in.
- CORRECT ANS>>D. 100
The minimum dimension of air openings for combustion air for gas appliances is
- CORRECT ANS>>A. 3"
When using two permanent openings to provide combustion air for gas appliances and
communicating directly with the outdoors, each opening shall have a minimum free area of 1
sq. in for every total input rating of all equipment in the enclosure.
- CORRECT ANS>>B. 4,000 btu
When installing all gas appliances, combustion air is allowed to utilize one permanent
opening commencing within 12" from the top of the enclosure. The opening must be a
minimum 1 sq. in for every total appliance input.
- CORRECT ANS>>B. 3,000 btu
When mechanical combustion air is provided for gas appliances, the combustion air shall be
supplied from the outdoors at a rate not less than cfm per 1,000 btu/h of total input rating of
all appliances located within the space.
- CORRECT ANS>>C. .35
Where exhaust fans are installed, air shall be provided to replace the exhausted air.
- CORRECT ANS>>D. make up
Where the design free area of louvers and grilles are not known, it shall be assumed that
wood louvers will have % free area and metal louvers will have % free area.
- CORRECT ANS>>D. 25; 75
Combustion air ducts for gas appliances shall not be where terminating in an attic.
- CORRECT ANS>>A. screened
Condensate waste and drain line size shall not be less then .
- CORRECT ANS>>D. 3/4" internal diameter
