The term _____________ is used to indicate the spacing of the drill holes.(a) Drilling bit(b) Drilling pattern(c) Abrasion drill(d) Percussion drillingThis question was addressed to me in an internship interview.My question is based upon Equipments in division Construction Equipments of Construction & Building Materials

The term _____________ is used to indicate the spacing of the drill ho

1.	The term _____________ is used to indicate the spacing of the drill holes.(a) Drilling bit(b) Drilling pattern(c) Abrasion drill(d) Percussion drillingThis question was addressed to me in an internship interview.My question is based upon Equipments in division Construction Equipments of Construction & Building Materials
Answer» The correct option is (b) Drilling pattern For explanation I WOULD say: The drilling pattern to be selected for LOADING of explosives which depend on the type of drill employed, depth of the drill holes, amount of stemming required, type of rock, quantity and quality of explosive, ETC. There are several drilling patterns based on practical experience and suitable modifications are made to meet with the REQUIREMENT of each INDIVIDUAL project.

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