A __________ is commonly used in open-pit mining and quarrying., a) drill jumbo, b) roller-bit rotary drill, c) stoper drill, A __________ uses a hammering action to break rock., a) percussion drill, b) small auger, c) large-hole rig, A __________ combines rotation and impact., a) long-hole drill, b) rotary-percussion drill, c) stoper drill, A __________ is mainly used for surface mining., a) small auger, b) drill jumbo, c) drifter, A __________ is used for sublevel stoping and produces large-diameter holes., a) stoper drill, b) large-hole rig, c) small auger, A __________ is designed to make long, accurate blast holes., a) long-hole drill, b) percussion drill, c) roller-bit rotary drill, A __________ is commonly associated with quarrying and upward drilling., a) drill jumbo, b) stoper drill, c) large-hole rig, A __________ is used for controlled horizontal drilling., a) column-and-bar mounted drifter, b) small auger, c) long-hole drill, A __________ can drill several holes at the same time., a) stoper drill, b) drill jumbo, c) percussion drill

MINING BOOK 2 UNIT 3

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