G-36 LPG/CNG in Manhole Operations: Exam Preparation Guide and FAQs

The FDNY G-36 Certificate of Fitness is required for individuals who supervise LPG/CNG containers used to fuel appliances at manholes or similar underground structures in New York City. Candidates must pass a written examination to obtain the certificate, making focused preparation important for anyone involved in manhole heating or related operations.

What Is the G-36 Certificate of Fitness?

The G-36 Certificate of Fitness covers the use of liquefied petroleum gas (LPG) and compressed natural gas (CNG) in manhole operations. The New York City Fire Department (FDNY) identifies G-36 specifically for manhole operations and manhole heating.

The certificate is issued to a specific individual and is valid throughout New York City. Applicants must pass the required written examination before receiving the Certificate of Fitness.

The current FDNY study material groups G-36 with other LPG/CNG Certificate of Fitness examinations, including G-22, G-23, G-24, G-34, G-40, and G-44. For G-36, candidates are directed to study the designated section covering manhole operations and heating.

What Does the G-36 Exam Cover?

The examination focuses on the safe use and handling of LPG/CNG during manhole operations. Candidates should understand the characteristics of these fuels, equipment requirements, operating procedures, and hazards associated with underground work.

Key preparation areas include:

• LPG and CNG properties
• Compressed-gas safety
• Storage and handling
• Connecting and disconnecting containers
• Regulators and fuel-supply equipment
• Manhole heating equipment
• Ventilation
• Fire and explosion hazards
• Personal protective equipment
• Hazard recognition
• Emergency procedures
• Safe operating practices
• FDNY Certificate of Fitness requirements

FDNY’s current study material identifies Storage and Handling of LPG/CNG, Case Studies, Lithium-Ion Safety, and the specific G-36 section as required preparation material for the LPG/CNG examinations.

Why Is LPG/CNG Safety Important in Manhole Operations?

Manholes and other underground structures can present confined-space hazards. Fuel gases must be handled carefully because leaks, inadequate ventilation, ignition sources, and improper equipment can create dangerous conditions.

Understanding the characteristics of LPG and CNG is therefore an important part of G-36 preparation. Candidates should learn how different gases behave when released and how ventilation and appropriate safety procedures affect the risk environment.

The FDNY study materials specifically organize G-36 preparation around LPG/CNG storage and handling and the use of these fuels for manhole operations.

What Should You Know About LPG and CNG?

Candidates should begin with the basic properties and terminology associated with both fuels.

LPG, or liquefied petroleum gas, is commonly used as a fuel and is stored as a liquefied gas under pressure.

CNG, or compressed natural gas, is natural gas stored under pressure. Understanding how compressed gases are stored, connected, transported, and used is essential for safe operation.

The FDNY study materials also include a general definitions section and a dedicated part covering storage and handling of LPG/CNG.

Candidates should pay particular attention to gas behavior, pressure, containers, valves, regulators, connections, leaks, ignition sources, and ventilation.

How Should You Prepare for the G-36 Exam?

A structured study plan can make the examination material easier to manage. Start with the official FDNY study material rather than relying exclusively on third-party practice resources.

A practical preparation routine includes:

1. Review the current G-36 Certificate of Fitness information.
2. Read the FDNY LPG/CNG definitions and general safety material.
3. Study storage and handling requirements.
4. Review the specific G-36 manhole-operation section.
5. Understand equipment, containers, regulators, and connections.
6. Study ventilation and hazard-control procedures.
7. Review emergency and fire-safety procedures.
8. Practice applying safety principles to workplace scenarios.
9. Use practice questions to identify weak areas.
10. Recheck the current FDNY requirements before taking the examination.

The FDNY currently provides the G-36 study material as part of its official LPG/CNG examination resources.

What Are Common G-36 Study Areas?

Candidates should give particular attention to topics that connect fuel properties with actual manhole operations.

Fuel Storage and Handling

Understand how LPG/CNG containers should be handled, connected, disconnected, stored, and protected from hazards.

Equipment

Review regulators, valves, hoses, appliances, containers, and other components used with LPG/CNG systems.

Ventilation

Understand why ventilation is important when fuel gases are used around underground structures and how inadequate ventilation can increase hazards.

Fire Prevention

Study ignition-source control, safe operating practices, emergency procedures, and appropriate fire-safety measures.

Personal Protective Equipment

Know the purpose of appropriate PPE and how it supports safe work practices during LPG/CNG operations.

Is the G-36 Exam Required?

Yes. FDNY states that applicants must pass a written examination to obtain a G-36 Certificate of Fitness. The certificate is required to supervise LPG/CNG containers used to fuel appliances at manholes or similar underground structures.

Applicants who need to take the examination must apply in person at the FDNY Public Certification Unit in Brooklyn. The current FDNY page lists the application location as 9 MetroTech Center, Brooklyn, NY 11201.

What Is the G-36 Application Fee?

The FDNY currently lists a $25 new-application fee and a $15 renewal fee for G-36. The department also states that applications are reviewed within approximately one to two days.

Because fees and application procedures can change, candidates should verify the current information with FDNY before applying.

Frequently Asked Questions

What does G-36 stand for?

G-36 is the FDNY Certificate of Fitness designation for the use of LPG/CNG in manhole operations, including manhole heating.

Who needs a G-36 Certificate of Fitness?

Individuals who supervise LPG/CNG containers used to fuel appliances at manholes or similar underground structures in New York City need the G-36 Certificate of Fitness.

Is there a written G-36 exam?

Yes. FDNY requires applicants to pass a written examination to obtain the G-36 Certificate of Fitness.

What should I study for G-36?

Focus on LPG/CNG definitions, storage and handling, equipment, manhole heating, ventilation, fire prevention, hazard recognition, emergency procedures, and the specific G-36 material in the FDNY study guide.

Is the G-36 certificate valid throughout New York City?

Yes. FDNY states that the G-36 Certificate of Fitness is valid throughout New York City for the specific person to whom it is issued.

Where can I find official G-36 study material?

FDNY provides official LPG/CNG study material covering G-36 and related Certificate of Fitness examinations. The current material identifies G-36 as the section for LPG/CNG use in manhole operations and manhole heating.

Can practice questions help with G-36 preparation?

Practice questions can help candidates check their understanding of safety concepts, fuel properties, equipment, and operating procedures. They should be used alongside the official FDNY study material rather than as a replacement for it.

Final Thoughts

The G-36 LPG/CNG in Manhole Operations exam focuses on knowledge needed for the safe supervision and use of fuel-gas equipment in manhole operations. Effective preparation should combine the official FDNY study material with a clear understanding of LPG/CNG properties, equipment, ventilation, fire prevention, and emergency procedures.

Candidates should always consult the latest FDNY requirements and study materials before taking the examination, as application procedures, fees, and examination information may be updated.