Answer :
Final answer:
To prevent overfilling of propane containers, two methods are widely used: the Overfill Protection Device (OPD) and the fixed liquid level gauge. The OPD automatically stops propane flow when the tank reaches capacity, while the fixed liquid level gauge provides a visual means to ensure the tank is not overfilled. The correct multiple-choice option is (a).
Explanation:
The question about preventing overfilling of propane containers can be addressed by understanding that two main methods are in use for this purpose: Overfill Protection Device (OPD) and fixed liquid level gauge. The OPD is designed to stop the flow of propane into the tank once it reaches its maximum allowed capacity, thus preventing overpressure and potential accidents. On the other hand, the fixed liquid level gauge is a visual indicator used during filling to ensure that the tank is not filled beyond its maximum permitted liquid level, again to avoid overpressurisation and provide safety during the tank's use.
Both the OPD and the fixed liquid level gauge work to mitigate risks associated with properly filling propane tanks, which is crucial not only for the safety of the individuals using them but also for the longevity and integrity of the tanks themselves. The correct multiple-choice option is (a).
