Question 32Safety & Environmental - Assistant Engineer

The correct answer is B) Prolonged exposure to gases such as CO2 may affect the accuracy of the indicator. This is correct because oxygen indicators can be affected by exposure to other gases, including carbon dioxide (CO2). Prolonged exposure to high levels of CO2 or other gases can cause the oxygen indicator to provide inaccurate readings of the actual oxygen concentration. The other options are incorrect: A) Oxygen indicators do not provide an instantaneous, accurate reading and may have a delay in responding to changes in the atmosphere. C) A cotton filter is not typically used to protect oxygen indicators from acidic gases, as the indicator itself may be affected by the gas exposure over time.