Question 33Safety & Environmental - Assistant Engineer

The correct answer is D) duration of exposure. The shade of the color on the spot produced by the sensitized tape used for hydrogen sulfide detection depends on the concentration of the gas and the duration of exposure. As the hydrogen sulfide gas interacts with the chemicals on the tape, the discoloration becomes more pronounced over time, indicating a higher concentration of the gas. The air temperature, pressure, and humidity during exposure do not directly affect the color change, but rather the overall sensitivity and response of the detection tape.