Q142
In the method of tube boring of soil investigation, the following is essential:
A.
A tube of about 2 meters length and 20 cm diameter with a cutting edge
B.
A flap valve at the bottom of tube is provided to extract the soil sample
C.
The tube is raised and lowered by 4 thick rope moving over a pulley suspended on a tripod stand
D.
All the above
AnswerAnswer: Option D
Solution
Answer: Option D
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