Combustible gas indicators must display volumes from zero percent to 100 percent in what increments?

Combustible gas indicators are essential tools used in various industries to detect and measure the concentration of combustible gases in the air. For effective monitoring and safety assessments, these instruments must display readings in a way that allows for precise interpretation of gas concentrations.

The choice indicating a measurement increment of 1 percent is correct because it provides a fine enough resolution to accurately assess gas levels without introducing excessive complexity. This 1 percent increment allows users to recognize small changes in gas concentration, which is crucial in ensuring environments are safe, as even minor variations can significantly affect safety protocols.

Using an increment of 1 percent means the readings are straightforward and easy to interpret, which is particularly important when trying to respond quickly to gas accumulation which can lead to hazardous situations. Other increments, although they might provide simpler readings or allow for quicker assessments, can potentially overlook important subtle shifts in gas concentrations that could lead to unsafe conditions.