MNG 331 Exam Questions Correctly Answered.

MNG 331 Exam Questions Correctly Answered. Why is the use of explosives important to our economy? - CORRECT ANSWER -Drilling & blasting is the least expensive way of breaking solid rock. -If it's hard rock, you have to use explosives to break it so you can economically mine it. -If we didn't have explosives, many raw materials would be very expensive. On average, how much explosives does the United States use every year? - CORRECT ANSWER 6 billion pounds What is the most efficient way to use explosives? - CORRECT ANSWER -Maximize energy used to break rock to requirements. -Minimize energy expended on making: Air blast, ground vibrations, and flyrock. Who invented the blasting cap? - CORRECT ANSWER Alfred Nobel Who invented dynamite? - CORRECT ANSWER Alfred Nobel The course objectives include: - CORRECT ANSWER Obtain an understanding of explosives and explosive products, and the ability to apply this to the breakage of rock in an environmentally acceptable and safe manner. The purpose of explosives is to break rock so we can easily: - CORRECT ANSWER Dig It Load It Haul It Crush It The goals of the course include: - CORRECT ANSWER To be knowledgeable in the subject and be confident and able to design blasting shots Secondary Fragmentation - CORRECT ANSWER Crushing and grinding in moving of muckpile Gas Pressure - CORRECT ANSWER Fractures extend to free face Shock Wave - CORRECT ANSWER Crushing around the hole Rotation of fragments - CORRECT ANSWER Momentum What is optimum fragmentation? - CORRECT ANSWER It varies from operation to operation.