Percussion drilling is unsuitable in _______(a) unconsolidated sand(b) unconsolidated gravel(c) consolidated rocks(d) quick sandThis question was addressed to me by my college director while I was bunking the class.My question is taken from Water Supply, Electrical and Road Work topic in section Rules and Methods of Measurement of Civil Engineering Drawing

Percussion drilling is unsuitable in _______(a) unconsolidated sand(b)

1.	Percussion drilling is unsuitable in _______(a) unconsolidated sand(b) unconsolidated gravel(c) consolidated rocks(d) quick sandThis question was addressed to me by my college director while I was bunking the class.My question is taken from Water Supply, Electrical and Road Work topic in section Rules and Methods of Measurement of Civil Engineering Drawing
Answer» Correct ANSWER is (d) quick sand Easy explanation: Percussion drilling is a manual drilling technique in which a heavy cutting or hammering BIT attached to a rope or cable is LOWERED in the open hole or inside a temporary casing. The technique is OFTEN also referred to as ‘Cable tool’. Usually a tripod is used to support the tools.

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