FDNY G98 Handling, Use and Storage of Flammable
Compressed Gases Practice 2026 Exam Questions with
Verified Answers and Rationales (GUARANTEED PASS)
QUESTION 1
What is the primary hazard associated with flammable compressed
gases?
A. Corrosion
B. Fire and explosion
C. Electrocution
D. Radiation
VERIFIED ANSWER: B
Rationale: Flammable compressed gases pose a significant risk of fire or
explosion if released in an uncontrolled manner and exposed to heat,
sparks, or open flames .
QUESTION 2
Which of the following gases is classified as a flammable compressed
gas?
A. Nitrogen
B. Propane
,C. Argon
D. Carbon dioxide
VERIFIED ANSWER: B
Rationale: Propane is a hydrocarbon gas that can ignite easily when
exposed to an ignition source. Nitrogen, argon, and carbon dioxide are
non-flammable .
QUESTION 3
Under NFPA standards, how should flammable gases be stored?
A. With oxidizers
B. In well-ventilated areas away from ignition sources
C. In underground tanks only
D. Next to heat sources
VERIFIED ANSWER: B
Rationale: Proper storage prevents gas accumulation and reduces the
likelihood of ignition. Well-ventilated areas allow any leaked gas to
disperse safely .
QUESTION 4
What is the minimum distance flammable gas cylinders must be kept from
sources of ignition?
A. 5 feet
,B. 10 feet
C. 20 feet
D. 50 feet
VERIFIED ANSWER: C
Rationale: NFPA guidelines and safety standards require flammable gas
cylinders to be stored at least 20 feet from potential ignition sources
such as open flames, welding equipment, or electrical sparks .
QUESTION 5
Which color is typically used to identify flammable gas cylinders?
A. Blue
B. Green
C. Red
D. Yellow
VERIFIED ANSWER: C
Rationale: Red is commonly used to indicate flammable gases for quick
visual recognition by workers and emergency responders. Color coding
helps identify the type of gas, alerting workers to potential hazards .
QUESTION 6
How should flammable gas cylinders be stored to prevent them from
falling over?
, A. Lying on their side
B. Stacked horizontally
C. Upright and secured with a chain or strap
D. On a soft surface
VERIFIED ANSWER: C
Rationale: Securing cylinders upright prevents tipping, which could
damage the valve and cause a leak. Cylinders should always be chained or
strapped to a fixed structure when not in use .
QUESTION 7
What should you do if a flammable gas cylinder is leaking?
A. Try to seal it with tape
B. Move it to a closed room
C. Evacuate the area, eliminate ignition sources, and notify the fire
department
D. Ignore it if minor
VERIFIED ANSWER: C
Rationale: Leaks of flammable gases are extremely hazardous as they
can quickly create a fire or explosion hazard. Evacuation and professional
emergency response are required .
QUESTION 8
Compressed Gases Practice 2026 Exam Questions with
Verified Answers and Rationales (GUARANTEED PASS)
QUESTION 1
What is the primary hazard associated with flammable compressed
gases?
A. Corrosion
B. Fire and explosion
C. Electrocution
D. Radiation
VERIFIED ANSWER: B
Rationale: Flammable compressed gases pose a significant risk of fire or
explosion if released in an uncontrolled manner and exposed to heat,
sparks, or open flames .
QUESTION 2
Which of the following gases is classified as a flammable compressed
gas?
A. Nitrogen
B. Propane
,C. Argon
D. Carbon dioxide
VERIFIED ANSWER: B
Rationale: Propane is a hydrocarbon gas that can ignite easily when
exposed to an ignition source. Nitrogen, argon, and carbon dioxide are
non-flammable .
QUESTION 3
Under NFPA standards, how should flammable gases be stored?
A. With oxidizers
B. In well-ventilated areas away from ignition sources
C. In underground tanks only
D. Next to heat sources
VERIFIED ANSWER: B
Rationale: Proper storage prevents gas accumulation and reduces the
likelihood of ignition. Well-ventilated areas allow any leaked gas to
disperse safely .
QUESTION 4
What is the minimum distance flammable gas cylinders must be kept from
sources of ignition?
A. 5 feet
,B. 10 feet
C. 20 feet
D. 50 feet
VERIFIED ANSWER: C
Rationale: NFPA guidelines and safety standards require flammable gas
cylinders to be stored at least 20 feet from potential ignition sources
such as open flames, welding equipment, or electrical sparks .
QUESTION 5
Which color is typically used to identify flammable gas cylinders?
A. Blue
B. Green
C. Red
D. Yellow
VERIFIED ANSWER: C
Rationale: Red is commonly used to indicate flammable gases for quick
visual recognition by workers and emergency responders. Color coding
helps identify the type of gas, alerting workers to potential hazards .
QUESTION 6
How should flammable gas cylinders be stored to prevent them from
falling over?
, A. Lying on their side
B. Stacked horizontally
C. Upright and secured with a chain or strap
D. On a soft surface
VERIFIED ANSWER: C
Rationale: Securing cylinders upright prevents tipping, which could
damage the valve and cause a leak. Cylinders should always be chained or
strapped to a fixed structure when not in use .
QUESTION 7
What should you do if a flammable gas cylinder is leaking?
A. Try to seal it with tape
B. Move it to a closed room
C. Evacuate the area, eliminate ignition sources, and notify the fire
department
D. Ignore it if minor
VERIFIED ANSWER: C
Rationale: Leaks of flammable gases are extremely hazardous as they
can quickly create a fire or explosion hazard. Evacuation and professional
emergency response are required .
QUESTION 8
