What is expected to occur if the emergency flow indicator is white while holding one's breath?

When the emergency flow indicator is white while holding one's breath, it is indicating a problem with the oxygen supply system. The white color signifies that there is an issue, typically related to mask or system leakage. This happens because, under normal circumstances, if the system is functioning properly, the indicator would not remain white when the user is holding their breath and should be indicating the flow of oxygen. The presence of white suggests that either the mask is not sealing properly or there is some other form of leakage, preventing adequate oxygen delivery. Recognizing this condition is critical in aerospace operations, as it signals that the pilot may not be receiving the necessary oxygen supply, thus necessitating immediate corrective action to ensure safety.