Which of the following conditions is a sign of possible damage to a gas facility?

The correct answer highlights a significant safety concern within gas infrastructure. When a pipe travels under a garage, it may be at risk for several issues, including physical stress or damage due to the weight of vehicles or equipment above it. This placement can expose the pipe to potential leaks, corrosion, or other forms of deterioration, which may lead to hazardous situations such as gas leaks or even explosions if not managed properly.

Other options represent normal or safe conditions. Undamaged infrastructure signifies that there are no visible or detectable issues with the gas facilities. Routine operational checks indicate that the facility is being monitored and maintained appropriately, which does not suggest damage. Consistent gas flow readings typically denote stability and normal functioning, implying that there are no anomalies or signs of damage present. Thus, option B stands out as an indicator of possible damage that warrants further investigation and precautionary measures.