Moderate
Ringelmann chart No. 2 corresponds to _______________ percent black smoke?
Correct answer: C. 40
- A. 10
- B. 20
- C. 40
- D. 80
Explanation
Ringelmann chart number 2 represents about 40% blackness or opacity. The scale increases approximately from 0% for No. 0 to 100% for No. 5, making No. 2 equal to 40%.
Written and checked by Zahid Hussain, MS Computer ScienceLast updated
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