Question 235Safety & Environmental - QMED

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 prolonged exposure to certain gases, such as carbon dioxide (CO2). The presence of these gases can interfere with the instrument's ability to provide an accurate reading of the oxygen content in the space being measured. Option A is incorrect because oxygen indicators often have a slight delay in providing a reading, as they need time to analyze the air sample. Option C is incorrect because a cotton filter is not typically used to protect the instrument from acidic gases; this would not affect the accuracy of the reading. Option D is incorrect because not all the statements are true.