Rock Excavations Blasting Design Quiz
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Question 1 of 10
1. Question
1. Which of the following inventor was instrumental in the development of dynamite?
Hint
Invention and application of nitroglycerine dynamite by Alfred Nobel in 1866.
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Question 2 of 10
2. Question
2. When the combustion of the explosive compound occurs at less than the speed of sound it is called what?
Hint
Detonation occurs when the combustion of the explosive compound occurs more rapidly than the speed of sound.
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Question 3 of 10
3. Question
3. Give an example of a high explosive and low explosive?
Hint
Black Powder is a type of low explosive.
Dynamite is a type of high explosive. -
Question 4 of 10
4. Question
4. Powder factor is the ratio of?
Hint
Powder Factor is the ratio between the weight of explosives that have been detonated and the total volume of rock that was blasted.
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Question 5 of 10
5. Question
5. Of the two basic forms of energy released during an explosion which one provides majority of the work?
Hint
The gas energy released during the detonation process causes the majority of rock breakage in rock blasting where charges are confined in boreholes.
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Question 6 of 10
6. Question
6. Referencing the figure for detonation/explosion pressure, what is the approximate detonation velocity if the calculated detonation pressure is 20 Kbar?
Hint
10,000 ft/s
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Question 7 of 10
7. Question
7. Which of the following is not a mechanism that contributes to rock breakage in a confined charge?
Hint
Air blast overpressure
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Question 8 of 10
8. Question
8. Which of the following flexure failures generally leads to desirable breakage?
Hint
None of the above
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Question 9 of 10
9. Question
9. A blasting operation requires removal of limestone (a soft rock), this type of dynamite would be preferred?
Hint
Low Density Dynamite
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Question 10 of 10
10. Question
10. Dry blasting agents are most common with approximately 80% of explosives used in the United States, ANFO is a common type, what is the acronym for this?
Hint
ammonium nitrate and fuel oil