Which cassette has the larger filter area according to the data?

• A. The 37 mm cassette
• B. No cassette data
• C. The 25 mm cassette
• D. The 25 mm cassette has the larger area

Answer: (D)

The main idea is to read the data by comparing the reported filter-area values themselves. The cassette with the larger numerical value for filter area has the larger surface available for collecting particles. In this data set, the 25 mm cassette shows the larger area value, so it has the larger filter area. Keep in mind that “area” here is the measured or specified filtration surface, which may not line up exactly with the physical diameter due to how the filter is designed or arranged inside the cassette. So, you identify the answer by pointing to the option that corresponds to the higher area value in the data.