For how long does an SCSR 100 provide oxygen?

The SCSR 100, or Self-Contained Self-Rescuer 100, is designed to provide a supply of breathable oxygen in the event of an emergency, such as a fire or toxic gas release, commonly encountered in coal mining environments. It is specifically constructed to last for approximately one hour, which is crucial for allowing sufficient time for the individual to escape dangerous situations or reach a safe area where breathable air is available.

The one-hour duration is based on typical average consumption rates of oxygen and considers various factors, including the physical exertion of the user and the environment they're in. This makes it vital for workers to have reliable equipment that accommodates the time needed to evacuate from hazardous areas safely. This characteristic is essential for emergency preparedness and gives miners the assurance they need in threatening situations.

The durations provided in the other choices do not align with the specifications of the SCSR 100, as it is designed specifically for that one-hour mark, therefore emphasizing the importance of familiarization with this equipment and its operational capabilities.