INTERNATIONAL FUEL GAS CODE (IFGC) EXAM
(LATEST UPDATE) PREP EXAM/TEST
100 QUESTIONS AND 100% DETAILED VERIFIED
ANSWERS| A+ GRADE.
1. The International Fuel Gas Code primarily regulates which of the following
systems?
A. Electrical distribution systems
B. Plumbing drainage systems
C. Fuel gas piping, appliances, and accessories
D. Fire sprinkler systems
Correct Answer: C
and LP-gas.The IFGC governs the installation and operation of fuel gas systems
using natural gas
2. Which fuel gas is heavier than air and tends to accumulate near the floor?
A. Natural gas
B. Liquefied petroleum (LP) gas
C. Hydrogen
D. Methane
Correct Answer: B
LP gas is heavier than air, creating greater explosion risk in low areas.
3. Which authority has the final responsibility for interpreting the IFGC?
A. ICC
, B. Contractor
C. Engineer of record
D. Authority Having Jurisdiction (AHJ)
Correct Answer: D
The AHJ enforces and interprets code requirements locally.
4. The IFGC applies to fuel gas systems supplying which pressure range?
A. Only low-pressure systems
B. Only high-pressure systems
C. Low and high pressure unless otherwise excluded
D. Only residential systems
Correct Answer: C
The code addresses a wide range of pressures unless specifically exempted.
5. What is the minimum clearance required between a gas appliance vent
connector and combustible material (unless listed otherwise)?
A. 1 inch
B. 3 inches
C. 6 inches
D. 12 inches
Correct Answer: C
Standard vent connectors require 6 inches clearance unless listed for reduced
clearance.
6. Shutoff valves must be installed in which location relative to appliances?
A. Outside the building
B. Within the same room as the appliance
C. Inside the vent system
D. At the gas meter only
, Correct Answer: B
The IFGC requires appliance shutoff valves to be accessible and in the same room.
7. Which material is NOT permitted for underground gas piping?
A. Polyethylene (PE)
B. Steel
C. Copper in corrosive soil
D. Corrugated stainless steel tubing (CSST)
Correct Answer: C
Copper is prohibited underground in soils that can cause corrosion.
8. What is the minimum burial depth for underground gas piping under
private property?
A. 6 inches
B. 12 inches
C. 18 inches
D. 24 inches
Correct Answer: B
IFGC requires at least 12 inches of cover under private property.
9. Which test pressure is required for a low-pressure gas piping system before
inspection?
A. Operating pressure only
B. At least 3 psi
C. 10 psi
D. 15 psi
Correct Answer: B
Low-pressure systems must be tested at no less than 3 psi.
(LATEST UPDATE) PREP EXAM/TEST
100 QUESTIONS AND 100% DETAILED VERIFIED
ANSWERS| A+ GRADE.
1. The International Fuel Gas Code primarily regulates which of the following
systems?
A. Electrical distribution systems
B. Plumbing drainage systems
C. Fuel gas piping, appliances, and accessories
D. Fire sprinkler systems
Correct Answer: C
and LP-gas.The IFGC governs the installation and operation of fuel gas systems
using natural gas
2. Which fuel gas is heavier than air and tends to accumulate near the floor?
A. Natural gas
B. Liquefied petroleum (LP) gas
C. Hydrogen
D. Methane
Correct Answer: B
LP gas is heavier than air, creating greater explosion risk in low areas.
3. Which authority has the final responsibility for interpreting the IFGC?
A. ICC
, B. Contractor
C. Engineer of record
D. Authority Having Jurisdiction (AHJ)
Correct Answer: D
The AHJ enforces and interprets code requirements locally.
4. The IFGC applies to fuel gas systems supplying which pressure range?
A. Only low-pressure systems
B. Only high-pressure systems
C. Low and high pressure unless otherwise excluded
D. Only residential systems
Correct Answer: C
The code addresses a wide range of pressures unless specifically exempted.
5. What is the minimum clearance required between a gas appliance vent
connector and combustible material (unless listed otherwise)?
A. 1 inch
B. 3 inches
C. 6 inches
D. 12 inches
Correct Answer: C
Standard vent connectors require 6 inches clearance unless listed for reduced
clearance.
6. Shutoff valves must be installed in which location relative to appliances?
A. Outside the building
B. Within the same room as the appliance
C. Inside the vent system
D. At the gas meter only
, Correct Answer: B
The IFGC requires appliance shutoff valves to be accessible and in the same room.
7. Which material is NOT permitted for underground gas piping?
A. Polyethylene (PE)
B. Steel
C. Copper in corrosive soil
D. Corrugated stainless steel tubing (CSST)
Correct Answer: C
Copper is prohibited underground in soils that can cause corrosion.
8. What is the minimum burial depth for underground gas piping under
private property?
A. 6 inches
B. 12 inches
C. 18 inches
D. 24 inches
Correct Answer: B
IFGC requires at least 12 inches of cover under private property.
9. Which test pressure is required for a low-pressure gas piping system before
inspection?
A. Operating pressure only
B. At least 3 psi
C. 10 psi
D. 15 psi
Correct Answer: B
Low-pressure systems must be tested at no less than 3 psi.
