JOURNEYMAN GAS FITTER LICENSING
EXAMINATION COMPLETE QUESTIONS AND
DETAILED SOLUTIONS LATEST UPDATE THIS YEAR
JUST RELEASED
Question 1
Before beginning work on a new commercial gas piping installation, what is the
most important first step for a licensed journeyman gas fitter?
A. Purchase all piping materials before reviewing plans
B. Review approved plans, permits, and applicable fuel gas code requirements
C. Install the meter before obtaining inspection approval
D. Pressurize the system immediately after rough-in
Correct Answer: B
Rationale: Reviewing approved plans, permits, and code requirements ensures
the installation is legal, safe, and compliant before any physical work begins.
Question 2
When sizing a natural gas piping system, the gas fitter must primarily consider
appliance demand, gas pressure, and which additional factor?
A. Color of the piping material
B. Developed length of the piping run
C. Number of pipe supports only
D. Outdoor temperature only
,Correct Answer: B
Rationale: Pipe sizing depends heavily on developed length because pressure
drop increases as piping length increases, affecting available gas flow.
Question 3
A sediment trap is required on many gas appliance installations primarily to
prevent what condition?
A. Excessive gas pressure
B. Moisture and debris entering the appliance controls
C. Vent condensation forming
D. Combustion air restriction
Correct Answer: B
Rationale: Sediment traps collect debris, scale, and moisture before they reach
sensitive appliance valves and burners, helping prevent malfunctions.
Question 4
Which material is generally not permitted for exposed interior gas piping unless
specifically approved by the applicable fuel gas code?
A. Black steel pipe
B. Corrugated stainless steel tubing
C. PVC plastic pipe
D. Copper tubing where approved
Correct Answer: C
Rationale: PVC is not approved for exposed interior fuel gas distribution because
it lacks the required fire and mechanical resistance.
,Question 5
During a pressure test of a newly installed gas piping system, what should be
done with appliance regulators that cannot withstand test pressure?
A. Leave them connected and monitor closely
B. Increase test pressure slowly
C. Isolate or disconnect them from the test section
D. Open appliance valves fully
Correct Answer: C
Rationale: Regulators and other sensitive components may be damaged by test
pressures and must be isolated or removed during testing.
Question 6
What is the primary purpose of providing adequate combustion air to a gas-fired
appliance?
A. Reduce piping costs
B. Increase gas meter capacity
C. Ensure complete combustion and safe operation
D. Cool the appliance jacket
Correct Answer: C
Rationale: Adequate combustion air supports complete combustion, reducing
carbon monoxide production and ensuring efficient, safe appliance performance.
Question 7
A gas shutoff valve installed for an appliance must generally be located where?
A. Outside the building only
, B. In a concealed wall cavity
C. In the same room and readily accessible
D. Directly above the burner
Correct Answer: C
Rationale: Codes generally require appliance shutoff valves to be accessible and
located in the same room as the appliance.
Question 8
Which condition is most likely to cause excessive carbon monoxide production in
a natural gas appliance?
A. Proper manifold pressure
B. Adequate combustion air
C. Incomplete combustion caused by insufficient air
D. Correct vent sizing
Correct Answer: C
Rationale: Insufficient combustion air leads to incomplete combustion, which is a
major cause of elevated carbon monoxide levels.
Question 9
When installing CSST, bonding requirements are intended primarily to reduce the
risk of damage from what source?
A. Freezing temperatures
B. Lightning-related electrical energy
C. High gas odor levels
D. Water hammer
EXAMINATION COMPLETE QUESTIONS AND
DETAILED SOLUTIONS LATEST UPDATE THIS YEAR
JUST RELEASED
Question 1
Before beginning work on a new commercial gas piping installation, what is the
most important first step for a licensed journeyman gas fitter?
A. Purchase all piping materials before reviewing plans
B. Review approved plans, permits, and applicable fuel gas code requirements
C. Install the meter before obtaining inspection approval
D. Pressurize the system immediately after rough-in
Correct Answer: B
Rationale: Reviewing approved plans, permits, and code requirements ensures
the installation is legal, safe, and compliant before any physical work begins.
Question 2
When sizing a natural gas piping system, the gas fitter must primarily consider
appliance demand, gas pressure, and which additional factor?
A. Color of the piping material
B. Developed length of the piping run
C. Number of pipe supports only
D. Outdoor temperature only
,Correct Answer: B
Rationale: Pipe sizing depends heavily on developed length because pressure
drop increases as piping length increases, affecting available gas flow.
Question 3
A sediment trap is required on many gas appliance installations primarily to
prevent what condition?
A. Excessive gas pressure
B. Moisture and debris entering the appliance controls
C. Vent condensation forming
D. Combustion air restriction
Correct Answer: B
Rationale: Sediment traps collect debris, scale, and moisture before they reach
sensitive appliance valves and burners, helping prevent malfunctions.
Question 4
Which material is generally not permitted for exposed interior gas piping unless
specifically approved by the applicable fuel gas code?
A. Black steel pipe
B. Corrugated stainless steel tubing
C. PVC plastic pipe
D. Copper tubing where approved
Correct Answer: C
Rationale: PVC is not approved for exposed interior fuel gas distribution because
it lacks the required fire and mechanical resistance.
,Question 5
During a pressure test of a newly installed gas piping system, what should be
done with appliance regulators that cannot withstand test pressure?
A. Leave them connected and monitor closely
B. Increase test pressure slowly
C. Isolate or disconnect them from the test section
D. Open appliance valves fully
Correct Answer: C
Rationale: Regulators and other sensitive components may be damaged by test
pressures and must be isolated or removed during testing.
Question 6
What is the primary purpose of providing adequate combustion air to a gas-fired
appliance?
A. Reduce piping costs
B. Increase gas meter capacity
C. Ensure complete combustion and safe operation
D. Cool the appliance jacket
Correct Answer: C
Rationale: Adequate combustion air supports complete combustion, reducing
carbon monoxide production and ensuring efficient, safe appliance performance.
Question 7
A gas shutoff valve installed for an appliance must generally be located where?
A. Outside the building only
, B. In a concealed wall cavity
C. In the same room and readily accessible
D. Directly above the burner
Correct Answer: C
Rationale: Codes generally require appliance shutoff valves to be accessible and
located in the same room as the appliance.
Question 8
Which condition is most likely to cause excessive carbon monoxide production in
a natural gas appliance?
A. Proper manifold pressure
B. Adequate combustion air
C. Incomplete combustion caused by insufficient air
D. Correct vent sizing
Correct Answer: C
Rationale: Insufficient combustion air leads to incomplete combustion, which is a
major cause of elevated carbon monoxide levels.
Question 9
When installing CSST, bonding requirements are intended primarily to reduce the
risk of damage from what source?
A. Freezing temperatures
B. Lightning-related electrical energy
C. High gas odor levels
D. Water hammer
