Discussion :: Building Construction
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In the method of tube boring of soil investigation, the following is essential :
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A.
a tube of about 2 metres length and 20 cm diameter with a cutting edge |
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B.
a flap valve at the bottom of tube is provided to extract the soil sample |
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C.
the tube is raised and lowered by 4 thick rope moving over a pulley suspended on a tripod stand |
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D.
the tube is dropped to fall under gravity in side a metalic casing pipe which is driven as the depth of excavation proceeds. |
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E.
all the above. |
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Answer : Option E
Explanation :
No answer description available for this question.
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