What would be the PRIMARY hazard to a responder while rescuing victims in a building where a non-flammable hazard class 2 product is leaking?

• A. Inhalation
• B. Electrical shock
• C. Burns
• D. Exposure to contamination on skin

Answer: (A)

When a non-flammable gas is leaking, the most immediate danger to someone rescuing victims is inhalation. Gas leaks in enclosed spaces can displace oxygen, creating an oxygen-deficient environment. Even though the gas won’t ignite, breathing contaminated or reduced-oxygen air can quickly lead to dizziness, loss of consciousness, or death. That’s why responders must protect their breathing with appropriate respirators (often SCBAs) and ventilate or evacuate victims to fresh air.

Electrical shock and burns aren’t the primary concerns here because the gas isn’t flammable, so ignition hazards are less likely, and burns would depend on existing ignition sources or contact with hot surfaces. Skin exposure could be a concern, but the most dangerous and immediate risk during rescue is inhalation due to oxygen displacement and potential inhalation of the gas itself.