FDNY G22 CERTIFICATE OF FITNESS: USE OF
LPG/CNG EXAM – QUESTIONS AND ANSWERS |
VERIFIED AND WELL DETAILED ANSWERS | PLUS
RATIONALES | GUARANTEED PASS | LATEST EXAM
UPDATE
Core Domains:
1. Properties and Characteristics of LPG and CNG
2. FDNY Regulations and Fire Code Compliance
3. Storage and Handling Procedures
4. Leak Detection and Emergency Response
5. Cylinder and Container Safety Standards
6. Piping Systems and Appliance Installation
7. Ventilation and Fire Prevention Measures
8. Transportation and Delivery Protocols
9. Inspection, Testing, and Maintenance Requirements
10. Ethics, Recordkeeping, and Professional Standards
Introduction
This comprehensive examination is designed to assess the knowledge, skills, and
decision-making capabilities required for the safe and legal use of liquefied
petroleum gas (LPG) and compressed natural gas (CNG) within New York City.
Candidates must demonstrate a thorough understanding of FDNY regulations, fire
prevention strategies, proper storage and handling techniques, and emergency
response protocols. The exam comprises 200 multiple-choice questions presented in
two sections, combining theoretical foundations with practical, scenario-based
applications. Emphasis is placed on real-world decision-making, regulatory
compliance, and ethical professional conduct. Successful completion of this exam
verifies that the certificate holder possesses the competence necessary to protect life
and property through the responsible management of these hazardous materials.
,SECTION ONE: QUESTIONS 1–100
Question 1
What is the primary reason LPG vapor is heavier than air?
A. LPG vapor has a lower molecular weight than air
B. LPG vapor is composed of propane and butane, which have higher densities
than atmospheric gases
C. LPG vapor expands significantly when released
D. LPG vapor mixes uniformly with air regardless of density
🟢B
🔴 Explanation: LPG vapor is composed primarily of propane and butane, both of
which have molecular weights greater than the average molecular weight of air.
This causes the vapor to settle in low-lying areas, creating a significant fire and
explosion hazard.
Question 2
According to FDNY regulations, what is the maximum allowable capacity for an
individual LPG cylinder stored indoors at a residential occupancy without a special
permit?
A. 50 pounds
B. 100 pounds
C. 10 pounds
D. 20 pounds
🟢D
🔴 Explanation: FDNY Fire Code restricts indoor storage of LPG cylinders in
residential occupancies to a maximum of 20 pounds per cylinder without special
permits. This limitation reduces the potential for catastrophic fires or explosions
within occupied spaces.
,Question 3
Which of the following is the correct procedure when a strong odor of gas is
detected in an area with LPG equipment?
A. Immediately operate all electrical switches to verify power
B. Evacuate the area, eliminate all sources of ignition, and ventilate from a safe
location
C. Light a match to determine the source of the leak
D. Close all windows and doors to contain the gas
🟢B
🔴 Explanation: When a gas odor is detected, the immediate priorities are to
protect life and prevent ignition. Evacuation, elimination of ignition sources, and
safe ventilation are the correct actions. Operating electrical switches or lighting
matches could create sparks or flames, igniting the gas.
Question 4
What is the primary function of an excess flow valve in an LPG system?
A. To regulate the pressure of gas flowing to appliances
B. To automatically shut off or restrict gas flow if a leak or rupture occurs
downstream
C. To filter impurities from the gas stream
D. To measure the volume of gas consumed
🟢B
🔴 Explanation: An excess flow valve is a safety device designed to detect
abnormally high gas flow rates indicative of a line break or major leak. Upon
detection, the valve activates to significantly reduce or stop gas flow, preventing
the uncontrolled release of large quantities of fuel.
Question 5
Which agency regulates the transportation of LPG and CNG by highway within
New York City?
, A. Environmental Protection Agency (EPA)
B. Department of Transportation (DOT)
C. New York State Department of Environmental Conservation (DEC)
D. Occupational Safety and Health Administration (OSHA)
🟢B
🔴 Explanation: The U.S. Department of Transportation (DOT) has primary
jurisdiction over the transportation of hazardous materials, including LPG and
CNG, by highway. This includes requirements for vehicle markings, shipping
papers, cylinder specifications, and driver training.
Question 6
A G22 certificate holder observes a co-worker bypassing a safety interlock on a
CNG fueling station. What is the most appropriate ethical and professional
response?
A. Ignore the action because it is not the certificate holder's responsibility
B. Immediately report the safety violation to a supervisor and document the
incident
C. Assist the co-worker to ensure the task is completed quickly
D. Recommend a better method for bypassing the interlock to improve efficiency
🟢B
🔴 Explanation: Reporting safety violations is a fundamental ethical and
professional duty. Bypassing safety interlocks creates a serious hazard. The
certificate holder must prioritize safety and report the violation to a supervisor or
designated authority, documenting the incident to ensure corrective action is
taken.
Question 7
What is the minimum required distance between an LPG container and any
building opening (door, window, or vent) in most NYC installations?
LPG/CNG EXAM – QUESTIONS AND ANSWERS |
VERIFIED AND WELL DETAILED ANSWERS | PLUS
RATIONALES | GUARANTEED PASS | LATEST EXAM
UPDATE
Core Domains:
1. Properties and Characteristics of LPG and CNG
2. FDNY Regulations and Fire Code Compliance
3. Storage and Handling Procedures
4. Leak Detection and Emergency Response
5. Cylinder and Container Safety Standards
6. Piping Systems and Appliance Installation
7. Ventilation and Fire Prevention Measures
8. Transportation and Delivery Protocols
9. Inspection, Testing, and Maintenance Requirements
10. Ethics, Recordkeeping, and Professional Standards
Introduction
This comprehensive examination is designed to assess the knowledge, skills, and
decision-making capabilities required for the safe and legal use of liquefied
petroleum gas (LPG) and compressed natural gas (CNG) within New York City.
Candidates must demonstrate a thorough understanding of FDNY regulations, fire
prevention strategies, proper storage and handling techniques, and emergency
response protocols. The exam comprises 200 multiple-choice questions presented in
two sections, combining theoretical foundations with practical, scenario-based
applications. Emphasis is placed on real-world decision-making, regulatory
compliance, and ethical professional conduct. Successful completion of this exam
verifies that the certificate holder possesses the competence necessary to protect life
and property through the responsible management of these hazardous materials.
,SECTION ONE: QUESTIONS 1–100
Question 1
What is the primary reason LPG vapor is heavier than air?
A. LPG vapor has a lower molecular weight than air
B. LPG vapor is composed of propane and butane, which have higher densities
than atmospheric gases
C. LPG vapor expands significantly when released
D. LPG vapor mixes uniformly with air regardless of density
🟢B
🔴 Explanation: LPG vapor is composed primarily of propane and butane, both of
which have molecular weights greater than the average molecular weight of air.
This causes the vapor to settle in low-lying areas, creating a significant fire and
explosion hazard.
Question 2
According to FDNY regulations, what is the maximum allowable capacity for an
individual LPG cylinder stored indoors at a residential occupancy without a special
permit?
A. 50 pounds
B. 100 pounds
C. 10 pounds
D. 20 pounds
🟢D
🔴 Explanation: FDNY Fire Code restricts indoor storage of LPG cylinders in
residential occupancies to a maximum of 20 pounds per cylinder without special
permits. This limitation reduces the potential for catastrophic fires or explosions
within occupied spaces.
,Question 3
Which of the following is the correct procedure when a strong odor of gas is
detected in an area with LPG equipment?
A. Immediately operate all electrical switches to verify power
B. Evacuate the area, eliminate all sources of ignition, and ventilate from a safe
location
C. Light a match to determine the source of the leak
D. Close all windows and doors to contain the gas
🟢B
🔴 Explanation: When a gas odor is detected, the immediate priorities are to
protect life and prevent ignition. Evacuation, elimination of ignition sources, and
safe ventilation are the correct actions. Operating electrical switches or lighting
matches could create sparks or flames, igniting the gas.
Question 4
What is the primary function of an excess flow valve in an LPG system?
A. To regulate the pressure of gas flowing to appliances
B. To automatically shut off or restrict gas flow if a leak or rupture occurs
downstream
C. To filter impurities from the gas stream
D. To measure the volume of gas consumed
🟢B
🔴 Explanation: An excess flow valve is a safety device designed to detect
abnormally high gas flow rates indicative of a line break or major leak. Upon
detection, the valve activates to significantly reduce or stop gas flow, preventing
the uncontrolled release of large quantities of fuel.
Question 5
Which agency regulates the transportation of LPG and CNG by highway within
New York City?
, A. Environmental Protection Agency (EPA)
B. Department of Transportation (DOT)
C. New York State Department of Environmental Conservation (DEC)
D. Occupational Safety and Health Administration (OSHA)
🟢B
🔴 Explanation: The U.S. Department of Transportation (DOT) has primary
jurisdiction over the transportation of hazardous materials, including LPG and
CNG, by highway. This includes requirements for vehicle markings, shipping
papers, cylinder specifications, and driver training.
Question 6
A G22 certificate holder observes a co-worker bypassing a safety interlock on a
CNG fueling station. What is the most appropriate ethical and professional
response?
A. Ignore the action because it is not the certificate holder's responsibility
B. Immediately report the safety violation to a supervisor and document the
incident
C. Assist the co-worker to ensure the task is completed quickly
D. Recommend a better method for bypassing the interlock to improve efficiency
🟢B
🔴 Explanation: Reporting safety violations is a fundamental ethical and
professional duty. Bypassing safety interlocks creates a serious hazard. The
certificate holder must prioritize safety and report the violation to a supervisor or
designated authority, documenting the incident to ensure corrective action is
taken.
Question 7
What is the minimum required distance between an LPG container and any
building opening (door, window, or vent) in most NYC installations?
