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_________________ is a self-propelled drill.

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_________________ is a self-propelled drill.

(a) Percussion drilling

(b) Shot drill

(c) Blasthole drill

(d) Diamond drill

The question was posed to me in a national level competition.

This intriguing question comes from Equipments topic in chapter Construction Equipments of Construction & Building Materials

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The correct option is (c) Blasthole drill

The explanation is: The Blasthole drill is a self propelled drill and it is mounted on a truck or on a Crawler truck. This drills are suitable for drilling operations of soft to medium rocks.

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