# E define the major components of a pusher cycle time

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E. Define the major components of a pusher cycle time used to assistscraper in loading. (3 points)F.What are the major factors to considered in selecting scrapers ? (3 points)Question # 4(25 points)A. What are the factors affecting loosing techniques in rock excavationprojects. (3 points)B.What is the metamorphic type of rock, give an example. (2 points)C.Identify two uses of the seismic test. (2 points)D. Mention two types of drilling equipment and one type of drilling pitassociated with each. (4 points)E.Explain the process that you would follow if you were to control thedirection of rock through in a rock excavation project. (4 point)F.A parallel-series electric blasting circuit consists of eight branches of sixcaps each. Holes are spaced 15 ft apart in a rectangular pattern, resultingin a total pattern length of 105 ft. cap legwire length is 24 feet. A No. 16gauge reverse hookup bus having a total length of 315 ft is used. The leadwires are No. 12 gauge with a one-way length of 1000 ft. Find theminimum dc current and voltage required to safely fire this blast undernormal conditions. (12 points)4% gradeSec. A cut 400 ftRR = 200 lb/tonSec. B haul 1500 ftRR = 80 lb/tonSec. C cut 1000 ftRR = 120 lb/tonSec. D fill 400 ftRR = 200 lb/tonGOOD LUCK1000 ftPower source6 caps eachLeads (# 12)Bus (# 16)