Alabama Gas Fitter Examination Questions And Correct Answers (Verified Answers) Plus Rationale 2027 Q&A | Instant Download Pdf – Questions And Answers | Verified And Well Detailed Answers | Plus Rationales | Guaranteed Pass | Latest Exam Update

ALABAMA GAS FITTER EXAMINATION QUESTIONS AND
CORRECT ANSWERS (VERIFIED ANSWERS) PLUS RATIONALE
2027 Q&A | INSTANT DOWNLOAD PDF – QUESTIONS AND
ANSWERS | VERIFIED AND WELL DETAILED ANSWERS | PLUS
RATIONALES | GUARANTEED PASS | LATEST EXAM UPDATE



CORE DOMAINS
1. Gas Fundamentals and Combustion Theory – Properties of fuel gases, combustion chemistry, BTU
content, specific gravity, and ignition characteristics.
2. Piping Materials and Installation – Approved piping materials, joining methods, CSST, copper, steel
pipe, and installation practices.
3. Pipe Sizing and Pressure Calculations – Gas load calculations, equivalent length, pressure drop, and
sizing tables.
4. Venting and Combustion Air – Venting categories, draft hoods, termination clearances, and
combustion air requirements.
5. Gas Appliances and Equipment – Appliance installation, controls, safety devices, and operational
requirements.
6. Codes, Regulations, and Licensing – Alabama Plumbers and Gas Fitters Examining Board rules,
IFGC, NFPA 54, and licensing requirements.
7. Safety, Testing, and Leak Detection – Pressure testing, leak detection methods, purging, and
emergency procedures.
8. Professional Ethics and Responsibility – Code compliance, workplace safety, and professional
standards.




INTRODUCTION
The Alabama Gas Fitter Examination assesses the knowledge and competency of individuals seeking
certification as Journeyman or Master Gas Fitters in the State of Alabama. This comprehensive
examination evaluates candidates on foundational gas theory, practical installation skills, code
compliance, safety protocols, and professional decision-making. The multiple-choice and scenario-based
structure emphasizes real-world application, requiring candidates to demonstrate critical thinking,
problem-solving abilities, and sound professional judgment. Successful completion ensures that certified
gas fitters possess the technical expertise and regulatory knowledge necessary to perform gas fitting work
safely and competently, protecting public health and property.

,SECTION ONE – QUESTIONS 1–100


Question 1

What is the primary combustible component of natural gas?

A. Propane
B. Butane
C. Methane
D. Hydrogen

🟢 Correct answer: C
🔴 Explanation: Natural gas typically contains 85–95% methane (CH₄), which serves as the primary
combustible component responsible for heat generation during combustion.




Question 2

What is the approximate specific gravity of natural gas relative to air?

A. 0.60
B. 1.50
C. 2.00
D. 0.85

🟢 Correct answer: A
🔴 Explanation: Natural gas has a specific gravity of approximately 0.60, meaning it is lighter than air
and will rise if leaked, dissipating more readily in open spaces.




Question 3

Which gas has a higher specific gravity than air and will settle in low areas if leaked?

A. Natural gas
B. Methane
C. Hydrogen
D. Propane

🟢 Correct answer: D

,🔴 Explanation: Propane has a specific gravity of approximately 1.52, making it heavier than air. If
leaked, propane will settle in low areas such as basements or pits, creating explosion hazards.




Question 4

What is the primary hazard associated with a natural gas leak in an enclosed space?

A. Asphyxiation
B. Fire or explosion
C. Corrosion
D. Water contamination

🟢 Correct answer: B
🔴 Explanation: Natural gas can accumulate and mix with air in explosive proportions (between 5%
and 15% concentration). Any ignition source can cause a fire or explosion, making this the primary
hazard.




Question 5

Which instrument is commonly used to measure gas pressure in inches of water column?

A. Hygrometer
B. Ammeter
C. Manometer
D. Thermocouple

🟢 Correct answer: C
🔴 Explanation: A manometer measures gas pressure accurately in inches of water column or PSI and
is commonly used for leak testing, regulator adjustment, and appliance pressure verification.




Question 6

What is the typical operating pressure for residential natural gas appliances?

A. 7 inches of water column
B. 5 PSI
C. 10 PSI
D. 25 PSI

🟢 Correct answer: A

, 🔴 Explanation: Residential natural gas appliances typically operate at approximately 7 inches of water
column (about 0.25 PSI), which is a low pressure safe for household appliances.




Question 7

What does the term "equivalent length" refer to in gas pipe sizing?

A. The actual measured length of pipe
B. Pipe length with equal pressure drop as fittings
C. The length of pipe required for expansion
D. The distance between regulators

🟢 Correct answer: B
🔴 Explanation: Equivalent length accounts for pressure resistance from fittings (elbows, tees, valves)
by converting them to an equivalent straight pipe length for accurate sizing calculations.




Question 8

What is the maximum allowable working pressure for typical residential natural gas piping systems?

A. 1 PSI
B. 5 PSI
C. 10 PSI
D. 25 PSI

🟢 Correct answer: B
🔴 Explanation: Residential gas systems are typically designed for low pressure not exceeding 5 PSI to
ensure safety and compatibility with standard appliances and regulators.




Question 9

Which code is the primary reference for fuel gas installations in Alabama?

A. NFPA 70 (National Electrical Code)
B. NFPA 54 (National Fuel Gas Code)
C. ASHRAE 90.1
D. OSHA 1910

🟢 Correct answer: B