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
1. What is the primary hazard associated with flammable compressed
gases?
A) Electrical shock
B) Fire and explosion
C) Corrosion
D) Asphyxiation
Rationale: Flammable compressed gases pose a significant risk of fire or
explosion if released in an uncontrolled manner.
2. Which of the following gases is classified as flammable?
A) Nitrogen
, B) Propane
C) Carbon dioxide
D) Helium
Rationale: Propane is a hydrocarbon gas that can ignite easily when exposed
to an ignition source.
3. What is the minimum safe distance for storing flammable compressed
gas cylinders from a source of ignition?
A) 5 feet
B) 10 feet
C) 20 feet
D) 50 feet
Rationale: NFPA guidelines require flammable gas cylinders to be stored at
least 20 feet from potential ignition sources.
4. Which type of valve should never be used on flammable compressed
gas cylinders?
A) Handwheel valve
B) Excess flow valve not rated for the gas
C) Cylinder outlet valve
D) Pressure relief valve
Rationale: Using valves not rated for flammable gases can result in leaks or
uncontrolled release, creating fire hazards.
, 5. What is the recommended method for transporting a full flammable
gas cylinder?
A) Rolling on its side
B) Using a cylinder cart secured upright
C) Dragging across the floor
D) Carrying by the valve
Rationale: Cylinders must be transported upright and secured to prevent
tipping, which could damage the cylinder or valve.
6. Flammable gas cylinders should be stored:
A) Near heat sources for quick access
B) In enclosed wooden cabinets
C) In a well-ventilated, cool area
D) Underground
Rationale: Proper storage involves ventilation to prevent gas accumulation
and keeping cylinders away from heat to reduce fire risk.
7. What color are flammable gas cylinders typically painted according to
OSHA/NFPA standards?
A) Red
B) Flame red or other standardized colors depending on gas
C) Blue
D) Yellow
, Rationale: Color coding helps identify the type of gas, alerting workers to
potential hazards.
8. Which of the following is a correct procedure before using a
flammable gas cylinder?
A) Open the valve fully and then adjust the regulator
B) Check the cylinder label, inspect for leaks, and secure the cylinder
C) Shake the cylinder to mix the gas
D) Heat the cylinder to increase flow
Rationale: Inspecting and securing the cylinder ensures safety and prevents
accidental release or fire.
9. The primary purpose of a regulator on a flammable gas cylinder is to:
A) Heat the gas for use
B) Reduce and control the gas pressure
C) Convert gas to liquid
D) Increase cylinder pressure
Rationale: Regulators control the high pressure from the cylinder to a safe,
usable level.
10. What action should be taken if a flammable gas leak is detected?
A) Ignore it if minor
B) Evacuate area, eliminate ignition sources, and call appropriate
personnel
Flammable Compressed Gases Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. What is the primary hazard associated with flammable compressed
gases?
A) Electrical shock
B) Fire and explosion
C) Corrosion
D) Asphyxiation
Rationale: Flammable compressed gases pose a significant risk of fire or
explosion if released in an uncontrolled manner.
2. Which of the following gases is classified as flammable?
A) Nitrogen
, B) Propane
C) Carbon dioxide
D) Helium
Rationale: Propane is a hydrocarbon gas that can ignite easily when exposed
to an ignition source.
3. What is the minimum safe distance for storing flammable compressed
gas cylinders from a source of ignition?
A) 5 feet
B) 10 feet
C) 20 feet
D) 50 feet
Rationale: NFPA guidelines require flammable gas cylinders to be stored at
least 20 feet from potential ignition sources.
4. Which type of valve should never be used on flammable compressed
gas cylinders?
A) Handwheel valve
B) Excess flow valve not rated for the gas
C) Cylinder outlet valve
D) Pressure relief valve
Rationale: Using valves not rated for flammable gases can result in leaks or
uncontrolled release, creating fire hazards.
, 5. What is the recommended method for transporting a full flammable
gas cylinder?
A) Rolling on its side
B) Using a cylinder cart secured upright
C) Dragging across the floor
D) Carrying by the valve
Rationale: Cylinders must be transported upright and secured to prevent
tipping, which could damage the cylinder or valve.
6. Flammable gas cylinders should be stored:
A) Near heat sources for quick access
B) In enclosed wooden cabinets
C) In a well-ventilated, cool area
D) Underground
Rationale: Proper storage involves ventilation to prevent gas accumulation
and keeping cylinders away from heat to reduce fire risk.
7. What color are flammable gas cylinders typically painted according to
OSHA/NFPA standards?
A) Red
B) Flame red or other standardized colors depending on gas
C) Blue
D) Yellow
, Rationale: Color coding helps identify the type of gas, alerting workers to
potential hazards.
8. Which of the following is a correct procedure before using a
flammable gas cylinder?
A) Open the valve fully and then adjust the regulator
B) Check the cylinder label, inspect for leaks, and secure the cylinder
C) Shake the cylinder to mix the gas
D) Heat the cylinder to increase flow
Rationale: Inspecting and securing the cylinder ensures safety and prevents
accidental release or fire.
9. The primary purpose of a regulator on a flammable gas cylinder is to:
A) Heat the gas for use
B) Reduce and control the gas pressure
C) Convert gas to liquid
D) Increase cylinder pressure
Rationale: Regulators control the high pressure from the cylinder to a safe,
usable level.
10. What action should be taken if a flammable gas leak is detected?
A) Ignore it if minor
B) Evacuate area, eliminate ignition sources, and call appropriate
personnel
