FDNY CoF G71 Exam
1. What is the primary purpose of the G-71 Certificate of Fitness?
A. To install electrical systems
B. To supervise natural gas piping systems work
C. To conduct welding operations
D. To inspect sprinkler systems
✅ Answer: B
Explanation: The G-71 CoF is required to supervise work involving natural gas piping
systems in NYC.
2. Which New York City code governs natural gas work operations?
A. NYC Electrical Code
B. NYC Fire Code
C. NYC Fuel Gas Code
D. NYC Building Code
✅ Answer: C
Explanation: The NYC Fuel Gas Code outlines rules for gas piping installation,
inspection, and maintenance.
3. Who must be present at the work site during all gas piping installation operations?
A. Licensed plumber only
B. FDNY inspector
C. Certificate of Fitness holder (G-71)
D. Fire Safety Director
✅ Answer: C
,Explanation: A G-71 Certificate holder must be on-site during operations involving
natural gas work.
4. Before beginning work on a gas piping system, what must be confirmed?
A. Approval from the insurance company
B. The gas meter is working
C. The work permit and gas authorization are in place
D. The fire extinguisher is full
✅ Answer: C
Explanation: Gas work must not begin without proper permits and utility company
authorization.
5. Natural gas is:
A. Heavier than air and sinks
B. Lighter than air and rises
C. Non-flammable
D. Colorless and odorless without odorant
✅ Answer: B
Explanation: Natural gas is lighter than air and rises, which is critical for ventilation
planning.
6. What odor is added to natural gas for safety?
A. Rotten eggs (mercaptan)
B. Chlorine
C. Sulfur dioxide
D. Carbon monoxide
✅ Answer: A
Explanation: Mercaptan is added to give gas a recognizable rotten egg smell for leak
detection.
7. If a gas leak is suspected, what is the FIRST action the G-71 holder should take?
A. Use a lighter to locate the leak
, B. Shut down the job site and evacuate the area
C. Cover the leak with a rag
D. Call the plumber to continue work
✅ Answer: B
Explanation: Immediate evacuation and shutdown are necessary to prevent ignition
or explosion.
8. Which of the following tools is prohibited when checking for gas leaks?
A. Soap and water solution
B. Combustible gas detector
C. Open flame
D. Electronic gas sniffer
✅ Answer: C
Explanation: Open flames must never be used to check for leaks due to explosion
risk.
9. How often should gas detectors and meters be calibrated?
A. Monthly
B. Daily
C. As per manufacturer instructions
D. Once every two years
✅ Answer: C
Explanation: Calibration must follow manufacturer guidelines to ensure accuracy.
10. Who is responsible for ensuring that workers follow all safety procedures at the
site?
A. The plumber’s apprentice
B. The general contractor
C. The G-71 Certificate holder
D. The building owner
✅ Answer: C
1. What is the primary purpose of the G-71 Certificate of Fitness?
A. To install electrical systems
B. To supervise natural gas piping systems work
C. To conduct welding operations
D. To inspect sprinkler systems
✅ Answer: B
Explanation: The G-71 CoF is required to supervise work involving natural gas piping
systems in NYC.
2. Which New York City code governs natural gas work operations?
A. NYC Electrical Code
B. NYC Fire Code
C. NYC Fuel Gas Code
D. NYC Building Code
✅ Answer: C
Explanation: The NYC Fuel Gas Code outlines rules for gas piping installation,
inspection, and maintenance.
3. Who must be present at the work site during all gas piping installation operations?
A. Licensed plumber only
B. FDNY inspector
C. Certificate of Fitness holder (G-71)
D. Fire Safety Director
✅ Answer: C
,Explanation: A G-71 Certificate holder must be on-site during operations involving
natural gas work.
4. Before beginning work on a gas piping system, what must be confirmed?
A. Approval from the insurance company
B. The gas meter is working
C. The work permit and gas authorization are in place
D. The fire extinguisher is full
✅ Answer: C
Explanation: Gas work must not begin without proper permits and utility company
authorization.
5. Natural gas is:
A. Heavier than air and sinks
B. Lighter than air and rises
C. Non-flammable
D. Colorless and odorless without odorant
✅ Answer: B
Explanation: Natural gas is lighter than air and rises, which is critical for ventilation
planning.
6. What odor is added to natural gas for safety?
A. Rotten eggs (mercaptan)
B. Chlorine
C. Sulfur dioxide
D. Carbon monoxide
✅ Answer: A
Explanation: Mercaptan is added to give gas a recognizable rotten egg smell for leak
detection.
7. If a gas leak is suspected, what is the FIRST action the G-71 holder should take?
A. Use a lighter to locate the leak
, B. Shut down the job site and evacuate the area
C. Cover the leak with a rag
D. Call the plumber to continue work
✅ Answer: B
Explanation: Immediate evacuation and shutdown are necessary to prevent ignition
or explosion.
8. Which of the following tools is prohibited when checking for gas leaks?
A. Soap and water solution
B. Combustible gas detector
C. Open flame
D. Electronic gas sniffer
✅ Answer: C
Explanation: Open flames must never be used to check for leaks due to explosion
risk.
9. How often should gas detectors and meters be calibrated?
A. Monthly
B. Daily
C. As per manufacturer instructions
D. Once every two years
✅ Answer: C
Explanation: Calibration must follow manufacturer guidelines to ensure accuracy.
10. Who is responsible for ensuring that workers follow all safety procedures at the
site?
A. The plumber’s apprentice
B. The general contractor
C. The G-71 Certificate holder
D. The building owner
✅ Answer: C
