ALABAMA GAS FITTER EXAM| COMPLETE EXAM WITH
ACTUAL QUESTIONS WITH CORRECT VERIFIED ANSWERS
WITH RATIONALES
1. The maximum allowable working pressure for a typical
residential gas piping system is:
A. 5 psi
B. 10 psi
C. 15 psi
D. 20 psi
Correct Answer: B
Rationale: Residential gas systems are normally limited to
10 psi for safety.
2. The primary purpose of a gas pressure regulator is to:
A. Increase gas flow
B. Reduce and control gas pressure
C. Filter contaminants
D. Heat gas
Correct Answer: B
Rationale: Regulators protect appliances and piping by
maintaining correct pressure.
,3. Which type of pipe is commonly used for underground
gas distribution?
A. PVC
B. Black steel
C. Copper
D. CPVC
Correct Answer: B
Rationale: Black steel pipe is durable and approved for
underground natural gas systems.
4. A gas shutoff valve should be installed:
A. At the meter and immediately upstream of each appliance
B. Only at the meter
C. Only near appliances
D. In the vent pipe
Correct Answer: A
Rationale: Local shutoff ensures safe maintenance and
emergency isolation.
5. The minimum burial depth for underground gas piping in
residential areas is:
,A. 6 inches
B. 12 inches
C. 18 inches
D. 24 inches
Correct Answer: B
Rationale: Code requires 12 inches minimum for protection
from accidental damage.
6. Gas piping must be supported:
A. Every 6 feet horizontally for steel
B. Only at corners
C. Only at vertical runs
D. At meter only
Correct Answer: A
Rationale: Supports prevent sagging and mechanical
damage.
7. A drip leg or sediment trap is installed:
A. On the appliance inlet
B. At low points in horizontal runs
C. At the meter only
, D. On vent stacks
Correct Answer: B
Rationale: Traps collect debris and moisture to protect
appliances.
8. The maximum allowable gas pressure for a residential
appliance is usually:
A. 1/2 psi
B. 2 psi
C. 5 psi
D. 10 psi
Correct Answer: B
Rationale: Most appliances are designed for 1/2 to 2 psi
maximum inlet pressure.
9. Flexible gas connectors are permitted for:
A. Underground piping
B. Connecting appliances to rigid piping
C. Long runs between meters
D. Venting
Correct Answer: B
ACTUAL QUESTIONS WITH CORRECT VERIFIED ANSWERS
WITH RATIONALES
1. The maximum allowable working pressure for a typical
residential gas piping system is:
A. 5 psi
B. 10 psi
C. 15 psi
D. 20 psi
Correct Answer: B
Rationale: Residential gas systems are normally limited to
10 psi for safety.
2. The primary purpose of a gas pressure regulator is to:
A. Increase gas flow
B. Reduce and control gas pressure
C. Filter contaminants
D. Heat gas
Correct Answer: B
Rationale: Regulators protect appliances and piping by
maintaining correct pressure.
,3. Which type of pipe is commonly used for underground
gas distribution?
A. PVC
B. Black steel
C. Copper
D. CPVC
Correct Answer: B
Rationale: Black steel pipe is durable and approved for
underground natural gas systems.
4. A gas shutoff valve should be installed:
A. At the meter and immediately upstream of each appliance
B. Only at the meter
C. Only near appliances
D. In the vent pipe
Correct Answer: A
Rationale: Local shutoff ensures safe maintenance and
emergency isolation.
5. The minimum burial depth for underground gas piping in
residential areas is:
,A. 6 inches
B. 12 inches
C. 18 inches
D. 24 inches
Correct Answer: B
Rationale: Code requires 12 inches minimum for protection
from accidental damage.
6. Gas piping must be supported:
A. Every 6 feet horizontally for steel
B. Only at corners
C. Only at vertical runs
D. At meter only
Correct Answer: A
Rationale: Supports prevent sagging and mechanical
damage.
7. A drip leg or sediment trap is installed:
A. On the appliance inlet
B. At low points in horizontal runs
C. At the meter only
, D. On vent stacks
Correct Answer: B
Rationale: Traps collect debris and moisture to protect
appliances.
8. The maximum allowable gas pressure for a residential
appliance is usually:
A. 1/2 psi
B. 2 psi
C. 5 psi
D. 10 psi
Correct Answer: B
Rationale: Most appliances are designed for 1/2 to 2 psi
maximum inlet pressure.
9. Flexible gas connectors are permitted for:
A. Underground piping
B. Connecting appliances to rigid piping
C. Long runs between meters
D. Venting
Correct Answer: B
