Question 78Safety & Environmental - 1st Asst/Chief

The correct answer is B) an oxygen deficiency in a space. An oxygen indicator is designed to detect a lack of oxygen in a given space or environment. This is important for ensuring the safety of personnel working in enclosed or confined spaces, as a deficiency of oxygen can pose serious health risks. The other answer choices are incorrect because an oxygen indicator is not specifically designed to detect carbon monoxide, explosive gases, or a combination of all these hazards. Its primary function is to monitor oxygen levels and alert when the concentration falls below a safe threshold.