Building Construction
In the method of tube boring of soil investigation, the following is essential:

A flap valve at the bottom of tube is provided to extract the soil sample
The tube is raised and lowered by 4 thick rope moving over a pulley suspended on a tripod stand
All listed here
A tube of about 2 meters length and 20 cm diameter with a cutting edge

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Building Construction
Assertion A : Shishum is used for decorative woodwork.Reason R : Shishum can be polished to an excellent finish.Select your answer according to the coding system given below:

Both A and R is true but R is not the correct explanation of A
Both A and R is true and R is the correct explanation of A
A is true but R is false
A is false but R is true

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