ExamVeda
Login
Home

When O2 falls to 5 or less and methane rises to...

This question belongs to Mining Engineering Drilling And Blasting
Drilling and Blasting
?

When O2 falls to 5% or less and methane rises to 30% N more behind the stopping, the samples collected at intervals of . . . . . . . .

Answer & Solution
Correct Answer: Option A
Let's discuss the solution. Join the discussion
Examveda
Question posted by Examveda
Community

Join the Discussion

No comments yet Be the first to discuss this question.
Keep Learning

Related Questions on Drilling and Blasting

Which of the following prime characteristic the nonel blasting has?
A. It has greater shock to the surrounding B. It is noiseless in character C. It has tremendous effect on explosive column D. It can not be used in a place where there is a chance of stray current
The main purpose of self rescuer is to enable the wearer to escape through an atmosphere resulting after a . . . . . . . . or after an . . . . . . . . in a mine.
A. Fire, Explosion B. Gas, Outburt C. Rockburst, bump D. None
Cyclone, bag filter and scrubber can be used for control.
A. Water pollution B. Soil pollution C. Air pollution D. Noise pollution
A two phase system in which an inner or dispersed phase is distributed in an outer called
A. Emulsion B. Slurry C. Explosion D. Erosion
More Related Questions on Drilling and Blasting