When the percentage reading increases during opacity testing of diesel engine exhaust gas, what does this indicate?

Question

Quizplus · Accepted Answer

Higher exhaust gas density is indicated by an increase in the percentage reading during opacity testing of diesel engine exhaust gas. This is because opacity measures the amount of light blocked by the exhaust, which increases with more particulate matter or denser exhaust gases.

When the Percentage Reading Increases During Opacity Testing of Diesel