Indoor Repair Exam Practice Questions And

FDNY G24 Use of Liquefied Petroleum Gas or Compressed Natural Gas in Emergency Indoor Repair Exam Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• What is the primary safety concern when using LPG or CNG indoors

during emergency repairs?

• Cost of fuel
• Noise levels
• Accumulation of flammable gases
• Speed of ignition

*Rationale: Flammable gases can accumulate in enclosed spaces, creating a

high risk of explosion or fire. 1 / 4

• Which type of detector is recommended to identify LPG leaks indoors?
• Smoke detector
• Combustible gas detector
• Carbon monoxide detector
• Heat detector

*Rationale: A combustible gas detector is specifically designed to sense

leaks of flammable gases like LPG.

• Before beginning an indoor repair using LPG, what must be ensured

regarding ventilation?

• Windows closed
• Air conditioning off
• Adequate ventilation to disperse any leaked gas
• Fans removed

*Rationale: Proper ventilation reduces the concentration of flammable

gases, lowering the risk of ignition.

• What is the maximum acceptable leak rate for LPG or CNG before it

must be shut off?

• 10% of the container capacity
• 5% of the container capacity
• 1% of the container capacity
• Any detectable leak 2 / 4

*Rationale: Any detectable leak must be addressed immediately to prevent

fire or explosion hazards.

• Which personal protective equipment (PPE) is essential during indoor

emergency gas repair?

• Sunglasses
• Gloves only
• Flame-resistant clothing, gloves, and eye protection
• Earplugs

*Rationale: Flame-resistant clothing and PPE protect workers from burns

and injuries during potential gas ignition events.

6. When using a portable LPG cylinder indoors, it should always be:

• Placed near heat sources
• Upright and secure
• Lying on its side
• Partially open

*Rationale: LPG cylinders are designed to release gas safely only when

upright.

• Which action should be taken if a strong odor of gas is detected during

repair?

• Continue work carefully
• Evacuate the area and ventilate immediately 3 / 4

• Ignore it
• Open windows slightly and stay

*Rationale: Gas accumulation poses immediate danger; evacuation is

necessary.

• What is the main hazard of using CNG indoors without proper

ventilation?

• Oxygen enrichment
• Explosion due to gas accumulation
• Water contamination
• Noise hazards

*Rationale: CNG can accumulate and create explosive conditions if

confined indoors.

• Which is the correct sequence for turning off an LPG supply during an

emergency?

• Cylinder valve, appliance valve, regulator
• Appliance valve, cylinder valve, regulator
• Cylinder valve first, then appliance valve, then regulator
• Regulator, appliance valve, cylinder valve

*Rationale: Shutting off the cylinder first stops the source of gas, reducing

risk during repair.

10. When repairing a leak indoors, spark-producing tools should be:

• Used with care
• / 4