ALABAMA GAS FITTER REAL EXAM 100
QUESTIONS WITH ANSWERS & RATIONALES
LATEST 2025-2026 UPDATE
1–10: Fundamental Concepts
1. Q: What does “BTU” stand for?
A: British Thermal Unit.
Rationale: BTU is the unit of heat required to raise 1 lb of water
1°F — used in gas appliance ratings.
2. Q: Natural gas is primarily composed of which gas?
A: Methane.
Rationale: Natural gas typically contains 85–95% methane, the
main combustible component.
3. Q: The primary hazard of a natural gas leak is:
A: Fire or explosion.
Rationale: Gas can mix with air in explosive proportions if leaked.
4. Q: Which tool is used to detect gas leaks?
A: Soapy water or electronic gas detector.
Rationale: Soapy water shows bubbles at leaks; detectors sense
gas concentrations.
5. Q: The standard gauge for measuring gas pressure is:
A: PSIG.
Rationale: Pounds per square inch gauge (PSIG) measures relative
pressure.
, 6. Q: Combustion air is required to:
A: Supply air for fuel combustion.
Rationale: Adequate combustion air prevents inefficient burning
and carbon monoxide formation.
7. Q: In gas fitting, “equivalent length” refers to:
A: Pipe length with equal pressure drop as fittings.
Rationale: Used in sizing to account for resistance from fittings.
8. Q: Before putting a gas line into service, it must be:
A: Leak tested at working pressure.
Rationale: Ensures integrity and safety of the system.
9. Q: A gas regulator’s main function is to:
A: Reduce and maintain pressure at a safe level.
Rationale: Regulates higher supply pressures down to usable
levels.
10. Q: The flame color of a properly adjusted natural gas
appliance should be:
A: Blue.
Rationale: A blue flame indicates complete combustion.
11–20: Codes & Compliance
11. Q: The current fuel gas code referenced for Alabama exams
is the:
A: 2021 International Fuel Gas Code.
Rationale: Alabama tests based on the latest adopted code.
12. Q: Alabama gas fitter exams are:
A: Open book.
Rationale: Candidates may use permissible code books during the
exam.
13. Q: Who regulates gas fitting licensing in Alabama?
A: Alabama Plumbers & Gas Fitters Examining Board.
Rationale: State board administers standards and exams.
QUESTIONS WITH ANSWERS & RATIONALES
LATEST 2025-2026 UPDATE
1–10: Fundamental Concepts
1. Q: What does “BTU” stand for?
A: British Thermal Unit.
Rationale: BTU is the unit of heat required to raise 1 lb of water
1°F — used in gas appliance ratings.
2. Q: Natural gas is primarily composed of which gas?
A: Methane.
Rationale: Natural gas typically contains 85–95% methane, the
main combustible component.
3. Q: The primary hazard of a natural gas leak is:
A: Fire or explosion.
Rationale: Gas can mix with air in explosive proportions if leaked.
4. Q: Which tool is used to detect gas leaks?
A: Soapy water or electronic gas detector.
Rationale: Soapy water shows bubbles at leaks; detectors sense
gas concentrations.
5. Q: The standard gauge for measuring gas pressure is:
A: PSIG.
Rationale: Pounds per square inch gauge (PSIG) measures relative
pressure.
, 6. Q: Combustion air is required to:
A: Supply air for fuel combustion.
Rationale: Adequate combustion air prevents inefficient burning
and carbon monoxide formation.
7. Q: In gas fitting, “equivalent length” refers to:
A: Pipe length with equal pressure drop as fittings.
Rationale: Used in sizing to account for resistance from fittings.
8. Q: Before putting a gas line into service, it must be:
A: Leak tested at working pressure.
Rationale: Ensures integrity and safety of the system.
9. Q: A gas regulator’s main function is to:
A: Reduce and maintain pressure at a safe level.
Rationale: Regulates higher supply pressures down to usable
levels.
10. Q: The flame color of a properly adjusted natural gas
appliance should be:
A: Blue.
Rationale: A blue flame indicates complete combustion.
11–20: Codes & Compliance
11. Q: The current fuel gas code referenced for Alabama exams
is the:
A: 2021 International Fuel Gas Code.
Rationale: Alabama tests based on the latest adopted code.
12. Q: Alabama gas fitter exams are:
A: Open book.
Rationale: Candidates may use permissible code books during the
exam.
13. Q: Who regulates gas fitting licensing in Alabama?
A: Alabama Plumbers & Gas Fitters Examining Board.
Rationale: State board administers standards and exams.
