Civil Engineering - UPSC Civil Service Exam Questions - Discussion

28. 

Ringelmann's scale is used to

[A]. measure CO
[B]. measure SO2
[C]. grade density of smoke
[D]. grade automobile exhaust gas

Answer: Option C

Explanation:

No answer description available for this question.

Post your comments here:

Name *:

Email   : (optional)

» Your comments will be displayed only after manual approval.