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_______________ is a heavy duty rock drills used for drifting and tunnelling and for benching and production drills.

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_______________ is a heavy duty rock drills used for drifting and tunnelling and for benching and production drills.

(a) Drifter

(b) Jack hammer

(c) Rotary Hammer

(d) Tripod drill

The question was asked in a job interview.

My question is from Equipments topic in section Construction Equipments of Construction & Building Materials

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The correct option is (a) Drifter

For explanation I would say: The Drifter can be used in both under ground and surface work mounted on Wagon drill, with features of reversible rotation, which can be also disengaged, so that only the impact mechanism works. Flushing is possible as air blows or water flushing and all drill functions are operated from a control.

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