The secondary barrier also called
A. Heavy
B. Light
C. Primary
D. None
Answer: Option A
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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. Five, Explosion
B. Gas, Outburt
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D. None
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D. Noise pollution
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C. Explosion
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