of Flammable Compressed Gases Exam

FDNY G98 Handling, Use, and Storage of Flammable Compressed Gases Exam Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• What is the most important safety precaution when handling

flammable compressed gas cylinders?

• Store cylinders near heat sources
• Transport cylinders without caps
• Keep cylinders upright and secured
• Open valves fully before transport

Rationale: Cylinders must always be kept upright and secured to

prevent tipping, damage, or accidental release of flammable gases.

• Which color is commonly used to identify flammable gas cylinders in

the United States? 1 / 4

• Green
• Red
• Blue
• Yellow

Rationale: In the US, yellow is the standard color for flammable gas

cylinders to differentiate them from other gas types.

• What is the primary hazard associated with flammable compressed

gases?

• Corrosion
• Fire and explosion
• Radiation
• Toxicity

Rationale: Flammable compressed gases pose a significant risk of fire

and explosion if released near ignition sources.

• When storing flammable gas cylinders, how far must they be kept

from sources of ignition?

• 5 feet
• 20 feet
• 50 feet
• 100 feet

Rationale: NFPA standards require flammable gas cylinders to be

stored at least 20 feet from sources of ignition. 2 / 4

• Which device should always be used when opening a cylinder valve?
• Hammer
• Pliers
• Proper regulator or wrench
• Pipe wrench

Rationale: Only the proper regulator or cylinder wrench should be

used to prevent valve damage and leaks.

• What is the purpose of a cylinder safety cap?
• To increase pressure
• To protect the valve during storage and transport
• To filter gas impurities
• To mark cylinder contents

Rationale: Safety caps protect the cylinder valve from damage which

could cause leaks or explosions.

• How should flammable gas cylinders be transported?
• Lying flat in a cart
• Rolling on their sides
• Upright with valve caps in place
• Hanging from a crane

Rationale: Cylinders must be upright and capped during transport to

prevent accidents and maintain control of the gas.

• What is the primary function of a regulator on a compressed gas

cylinder? 3 / 4

• To increase cylinder pressure
• To reduce gas pressure to a usable level
• To change gas type
• To prevent leaks entirely

Rationale: Regulators reduce high cylinder pressure to a safe, usable

pressure for equipment.

• Which NFPA code specifically addresses the storage and handling of

flammable compressed gases?

A. NFPA 30

B. NFPA 70

C. NFPA 55

D. NFPA 101

Rationale: NFPA 55 provides requirements for the storage, use, and

handling of compressed gases, including flammable types.

• When using a flammable gas cylinder in a workshop, which of

the following is critical?

• Keeping cylinders near open flames
• Storing cylinders in dark areas
• Ensuring proper ventilation
• Storing cylinders upside down

Rationale: Proper ventilation reduces the risk of gas accumulation,

which could lead to fire or explosion.

• / 4