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DRILLING AND BLASTING Multiple Choice Questions

1. A building where explosives and detonators are stored is called





2. The drilling pattern followed in underground coal mine is





3. The portable apparatus which provides the current necessary for firing electric detonators is called





4. What is the full form of PETN





5. which of the following is true for ordinary electric detonator





6. A delay detonator has a delay element introduced between





7. The delay detonators and non-delay detonators are distinguished physically by





8. Which of the following detonators are used with P5 explosives (solid blasting)?





9. What are the available delay numbers with copper tube only to be used with solid blasting?





10. Which of the following detonators are used mostly in oil and mineral prospecting?





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