In case of opencast working where any part of a public road or railway lies within the danger zone then there are some conditions imposed on charging or firing under current CMR 2017. Which of the following do not come under these conditions?
A. two persons are posted one each in either extreme points of such road, railway
B. they should have efficient telephonic communication system
C. they must have loud speakers or other means of intimating traffic
D. the charging or firing is not possible unless permission is obtained from PWD or Railway authority prior to such activity
Answer: Option D
This Question Belongs to Mining Engineering >> 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
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
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