What is a common safety feature found in modern gas appliances?

A flame failure device is a critical safety feature in modern gas appliances designed to prevent potential hazards associated with gas leaks. This device monitors the flame of the appliance. If the flame goes out for any reason—such as a draft, a spill, or insufficient fuel supply—the flame failure device acts quickly by shutting off the gas supply to prevent unburned gas from escaping into the environment. This helps to reduce the risk of explosions or fire, making it an essential safety mechanism in homes and commercial settings.

While other options, like an automatic shut-off valve, pressure regulator, and gas leak detector, also contribute to safety, the flame failure device specifically addresses the immediate danger of a flame being extinguished and the subsequent risk of gas accumulation. Each feature plays a role in an overall safety system, but the flame failure device is uniquely effective in preventing dangerous situations that can arise from a gas appliance operating without a flame.