Practice Exam Questions And Correct

FDNY G46 Storage, Handling, Use and Refilling of Non-Flammable Gas Cylinders Practice Exam Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• What does the G46 certificate primarily regulate?
• Gasoline storage
• Flammable LPG systems
• Storage and handling of non-flammable gas cylinders
• Coal-based fuel systems

Rationale: G46 is specifically designated for non-flammable gas

cylinders, not flammable gas systems.

• Which gas would fall under a G46 regulation?
• Propane
• Carbon dioxide
• Acetylene 1 / 3

• Hydrogen

Rationale: CO2 is a non-flammable gas, appropriate to G46

regulations.

3. Non-flammable gas cylinders must be stored:

• Horizontally
• Upright and secured
• On their side
• Under pressure

Rationale: Cylinders must always remain upright and secured to

prevent displacement and valve damage.

4. When transporting cylinders, the protective caps should be:

• Removed
• Installed and tightened
• Loosely fitted
• Covered with plastic

Rationale: Caps protect the valve from impact during transport.

• Which symbol denotes a non-flammable gas?
• Flame icon
• Green diamond label
• Skull and crossbones
• Yellow triangular exclamation

Rationale: The green diamond is the DOT marking for non-flammable

compressed gas. 2 / 3

6. Before refilling a cylinder, one must verify:

• Customer identity
• Cylinder certification and hydrostatic date
• Temperature outside
• Color of storage cage

Rationale: A cylinder must be within its hydrostatic test period to be

safely refilled.

• Cylinders must be kept at least how far from a heat source?
• 1 ft
• 3 ft
• 5 ft
• 10 ft

Rationale: Heat exposure increases internal pressure and can

compromise safety.

• Who may authorize the refilling of non-flammable gas cylinders on

site?

• Any employee
• A trained and certified G46 holder
• The building superintendent
• Delivery personnel

Rationale: Only certified personnel may handle and refill cylinders

under FDNY rules.

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