Describe two indicators that a gas-powered appliance may be involved in a fire and how firefighters should respond.

• A. Gas odor or hissing near an appliance and flames or heat near fuel sources; respond by isolating the gas supply if safe, ventilating, and contacting the utility for shutoff.
• B. Loud banging from pipes; ignore.
• C. Water leaks near appliance; shut off water.
• D. Smoke from appliance but continue operations without isolating gas.

Answer: (A)

The main idea here is recognizing when gas may be fueling a fire and knowing the immediate safety steps to stop the fuel source. Gas odor or a hissing sound near an appliance signals that gas may be leaking and feeding the fire, while flames or intense heat near fuel sources show a direct fire hazard connected to the gas system. In that situation, the safest and most effective response is to isolate the gas supply if it can be done safely—close the appliance valve or the main gas shutoff—ventilate the area to dilute any accumulated gas, and call the utility to shut off the supply. Ventilation reduces the risk of a gas cloud igniting and helps firefighters operate more safely, while the utility can secure the source so the fire won’t reignite.

Other options don’t fit because loud banging from pipes isn’t a reliable indicator of gas involvement and doesn’t address the gas hazard; water leaks aren’t related to gas and don’t stop a gas-fed fire; and continuing operations without isolating the gas keeps a fuel source active and raises the risk of explosion or a rapid flare-up.